diff --git a/arion-compose/fixtures-mongodb.nix b/arion-compose/fixtures-mongodb.nix
index 47446e23..f76af617 100644
--- a/arion-compose/fixtures-mongodb.nix
+++ b/arion-compose/fixtures-mongodb.nix
@@ -1,4 +1,5 @@
 # MongoDB fixtures in the form of docker volume mounting strings
 {
+  all-fixtures = "${toString ./..}/fixtures/mongodb:/docker-entrypoint-initdb.d:ro";
   chinook = "${toString ./..}/fixtures/mongodb/chinook:/docker-entrypoint-initdb.d:ro";
 }
diff --git a/arion-compose/project-connector.nix b/arion-compose/project-connector.nix
index 22c7e687..5af31152 100644
--- a/arion-compose/project-connector.nix
+++ b/arion-compose/project-connector.nix
@@ -6,7 +6,7 @@
 
 { pkgs, ... }:
 let
-  connector-port = "7130";
+  connector = "7130";
   engine-port = "7100";
   mongodb-port = "27017";
 in
@@ -14,13 +14,16 @@ in
   project.name = "mongodb-connector";
 
   services = {
-    connector = import ./service-mongodb-connector.nix {
+    connector = import ./service-connector.nix {
       inherit pkgs;
-      port = connector-port;
-      hostPort = connector-port;
+      configuration-dir = ../fixtures/connector/sample_mflix;
+      database-uri = "mongodb://mongodb/sample_mflix";
+      port = connector;
+      hostPort = connector;
       otlp-endpoint = "http://jaeger:4317";
       service.depends_on = {
         jaeger.condition = "service_healthy";
+        mongodb.condition = "service_healthy";
       };
     };
 
@@ -30,7 +33,7 @@ in
       hostPort = mongodb-port;
       volumes = [
         "mongodb:/data/db"
-        (import ./fixtures-mongodb.nix).chinook
+        (import ./fixtures-mongodb.nix).all-fixtures
       ];
     };
 
@@ -38,7 +41,9 @@ in
       inherit pkgs;
       port = engine-port;
       hostPort = engine-port;
-      connector-url = "http://connector:${connector-port}";
+      connectors = [
+        { name = "sample_mflix"; url = "http://connector:${connector}"; subgraph = ../fixtures/ddn/subgraphs/sample_mflix; }
+      ];
       otlp-endpoint = "http://jaeger:4317";
       service.depends_on = {
         auth-hook.condition = "service_started";
diff --git a/arion-compose/project-e2e-testing.nix b/arion-compose/project-e2e-testing.nix
index e25b1359..e8483684 100644
--- a/arion-compose/project-e2e-testing.nix
+++ b/arion-compose/project-e2e-testing.nix
@@ -18,8 +18,10 @@ in
       };
     };
 
-    connector = import ./service-mongodb-connector.nix {
+    connector = import ./service-connector.nix {
       inherit pkgs;
+      configuration-dir = ../fixtures/connector/chinook;
+      database-uri = "mongodb://mongodb/chinook";
       port = connector-port;
       service.depends_on.mongodb.condition = "service_healthy";
     };
@@ -35,7 +37,7 @@ in
     engine = import ./service-engine.nix {
       inherit pkgs;
       port = engine-port;
-      connector-url = "http://connector:${connector-port}";
+      connectors = [{ name = "chinook"; url = "http://connector:${connector-port}"; subgraph = ../fixtures/ddn/subgraphs/chinook; }];
       service.depends_on = {
         auth-hook.condition = "service_started";
       };
diff --git a/arion-compose/project-ndc-test.nix b/arion-compose/project-ndc-test.nix
index 541a0cf0..11721611 100644
--- a/arion-compose/project-ndc-test.nix
+++ b/arion-compose/project-ndc-test.nix
@@ -7,9 +7,10 @@ in
   project.name = "mongodb-ndc-test";
 
   services = {
-    test = import ./service-mongodb-connector.nix {
+    test = import ./service-connector.nix {
       inherit pkgs;
       command = "test";
+      configuration-dir = ../fixtures/connector/chinook;
       database-uri = "mongodb://mongodb:${mongodb-port}/chinook";
       service.depends_on.mongodb.condition = "service_healthy";
     };
@@ -17,6 +18,9 @@ in
     mongodb = import ./service-mongodb.nix {
       inherit pkgs;
       port = mongodb-port;
+      volumes = [
+        (import ./fixtures-mongodb.nix).chinook
+      ];
     };
   };
 }
diff --git a/arion-compose/service-mongodb-connector.nix b/arion-compose/service-connector.nix
similarity index 93%
rename from arion-compose/service-mongodb-connector.nix
rename to arion-compose/service-connector.nix
index 0843ca44..2bd9edf2 100644
--- a/arion-compose/service-mongodb-connector.nix
+++ b/arion-compose/service-connector.nix
@@ -12,8 +12,8 @@
 , profile ? "dev" # Rust crate profile, usually either "dev" or "release"
 , hostPort ? null
 , command ? "serve"
-, configuration-dir ? ../fixtures/connector/chinook
-, database-uri ? "mongodb://mongodb/chinook"
+, configuration-dir ? ../fixtures/connector/sample_mflix
+, database-uri ? "mongodb://mongodb/sample_mflix"
 , service ? { } # additional options to customize this service configuration
 , otlp-endpoint ? null
 }:
diff --git a/arion-compose/service-engine.nix b/arion-compose/service-engine.nix
index e72ed866..f6404d39 100644
--- a/arion-compose/service-engine.nix
+++ b/arion-compose/service-engine.nix
@@ -1,8 +1,7 @@
 { pkgs
 , port ? "7100"
 , hostPort ? null
-, connector-url ? "http://connector:7130"
-, ddn-subgraph-dir ? ../fixtures/ddn/subgraphs/chinook
+, connectors ? [{ name = "sample_mflix"; url = "http://connector:7130"; subgraph = ../fixtures/ddn/subgraphs/sample_mflix; }]
 , auth-webhook ? { url = "http://auth-hook:3050/validate-request"; }
 , otlp-endpoint ? "http://jaeger:4317"
 , service ? { } # additional options to customize this service configuration
@@ -12,8 +11,8 @@ let
   # Compile JSON metadata from HML fixture
   metadata = pkgs.stdenv.mkDerivation {
     name = "hasura-metadata.json";
-    src = ddn-subgraph-dir;
-    nativeBuildInputs = with pkgs; [ jq yq-go ];
+    src = (builtins.head connectors).subgraph;
+    nativeBuildInputs = with pkgs; [ findutils jq yq-go ];
 
     # The yq command converts the input sequence of yaml docs to a sequence of
     # newline-separated json docs.
@@ -22,13 +21,14 @@ let
     # switch), and modifies the json to update the data connector url.
     buildPhase = ''
       combined=$(mktemp -t subgraph-XXXXXX.hml)
-      for obj in **/*.hml; do
+      for obj in $(find . -name '*hml'); do
         echo "---" >> "$combined"
         cat "$obj" >> "$combined"
       done
       cat "$combined" \
         | yq -o=json \
-        | jq -s 'map(if .kind == "DataConnectorLink" then .definition.url = { singleUrl: { value: "${connector-url}" } } else . end) | map(select(type != "null"))' \
+        ${connector-url-substituters} \
+        | jq -s 'map(select(type != "null"))' \
         > metadata.json
     '';
 
@@ -37,6 +37,14 @@ let
     '';
   };
 
+  # Pipe commands to replace data connector urls in fixture configuration with
+  # urls of dockerized connector instances
+  connector-url-substituters = builtins.toString (builtins.map
+    ({ name, url, ... }:
+      '' | jq 'if .kind == "DataConnectorLink" and .definition.name == "${name}" then .definition.url = { singleUrl: { value: "${url}" } } else . end' ''
+    )
+    connectors);
+
   auth-config = pkgs.writeText "auth_config.json" (builtins.toJSON {
     version = "v1";
     definition = {
diff --git a/fixtures/connector/sample_mflix/schema/comments.json b/fixtures/connector/sample_mflix/schema/comments.json
new file mode 100644
index 00000000..bc8d022e
--- /dev/null
+++ b/fixtures/connector/sample_mflix/schema/comments.json
@@ -0,0 +1,44 @@
+{
+  "name": "comments",
+  "collections": {
+    "comments": {
+      "type": "comments"
+    }
+  },
+  "objectTypes": {
+    "comments": {
+      "fields": {
+        "_id": {
+          "type": {
+            "scalar": "objectId"
+          }
+        },
+        "date": {
+          "type": {
+            "scalar": "date"
+          }
+        },
+        "email": {
+          "type": {
+            "scalar": "string"
+          }
+        },
+        "movie_id": {
+          "type": {
+            "scalar": "objectId"
+          }
+        },
+        "name": {
+          "type": {
+            "scalar": "string"
+          }
+        },
+        "text": {
+          "type": {
+            "scalar": "string"
+          }
+        }
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/fixtures/connector/sample_mflix/schema/movies.json b/fixtures/connector/sample_mflix/schema/movies.json
new file mode 100644
index 00000000..31237cc7
--- /dev/null
+++ b/fixtures/connector/sample_mflix/schema/movies.json
@@ -0,0 +1,290 @@
+{
+  "name": "movies",
+  "collections": {
+    "movies": {
+      "type": "movies"
+    }
+  },
+  "objectTypes": {
+    "movies": {
+      "fields": {
+        "_id": {
+          "type": {
+            "scalar": "objectId"
+          }
+        },
+        "awards": {
+          "type": {
+            "object": "movies_awards"
+          }
+        },
+        "cast": {
+          "type": {
+            "nullable": {
+              "arrayOf": {
+                "scalar": "string"
+              }
+            }
+          }
+        },
+        "countries": {
+          "type": {
+            "arrayOf": {
+              "scalar": "string"
+            }
+          }
+        },
+        "directors": {
+          "type": {
+            "arrayOf": {
+              "scalar": "string"
+            }
+          }
+        },
+        "fullplot": {
+          "type": {
+            "scalar": "string"
+          }
+        },
+        "genres": {
+          "type": {
+            "arrayOf": {
+              "scalar": "string"
+            }
+          }
+        },
+        "imdb": {
+          "type": {
+            "object": "movies_imdb"
+          }
+        },
+        "languages": {
+          "type": {
+            "arrayOf": {
+              "scalar": "string"
+            }
+          }
+        },
+        "lastupdated": {
+          "type": {
+            "scalar": "string"
+          }
+        },
+        "metacritic": {
+          "type": {
+            "nullable": {
+              "scalar": "int"
+            }
+          }
+        },
+        "num_mflix_comments": {
+          "type": {
+            "nullable": {
+              "scalar": "int"
+            }
+          }
+        },
+        "plot": {
+          "type": {
+            "scalar": "string"
+          }
+        },
+        "poster": {
+          "type": {
+            "scalar": "string"
+          }
+        },
+        "rated": {
+          "type": {
+            "nullable": {
+              "scalar": "string"
+            }
+          }
+        },
+        "released": {
+          "type": {
+            "scalar": "date"
+          }
+        },
+        "runtime": {
+          "type": {
+            "scalar": "int"
+          }
+        },
+        "title": {
+          "type": {
+            "scalar": "string"
+          }
+        },
+        "tomatoes": {
+          "type": {
+            "object": "movies_tomatoes"
+          }
+        },
+        "type": {
+          "type": {
+            "scalar": "string"
+          }
+        },
+        "writers": {
+          "type": {
+            "arrayOf": {
+              "scalar": "string"
+            }
+          }
+        },
+        "year": {
+          "type": {
+            "scalar": "int"
+          }
+        }
+      }
+    },
+    "movies_awards": {
+      "fields": {
+        "nominations": {
+          "type": {
+            "scalar": "int"
+          }
+        },
+        "text": {
+          "type": {
+            "scalar": "string"
+          }
+        },
+        "wins": {
+          "type": {
+            "scalar": "int"
+          }
+        }
+      }
+    },
+    "movies_imdb": {
+      "fields": {
+        "id": {
+          "type": {
+            "scalar": "int"
+          }
+        },
+        "rating": {
+          "type": "extendedJSON"
+        },
+        "votes": {
+          "type": {
+            "scalar": "int"
+          }
+        }
+      }
+    },
+    "movies_tomatoes": {
+      "fields": {
+        "boxOffice": {
+          "type": {
+            "nullable": {
+              "scalar": "string"
+            }
+          }
+        },
+        "consensus": {
+          "type": {
+            "nullable": {
+              "scalar": "string"
+            }
+          }
+        },
+        "critic": {
+          "type": {
+            "nullable": {
+              "object": "movies_tomatoes_critic"
+            }
+          }
+        },
+        "dvd": {
+          "type": {
+            "nullable": {
+              "scalar": "date"
+            }
+          }
+        },
+        "fresh": {
+          "type": {
+            "nullable": {
+              "scalar": "int"
+            }
+          }
+        },
+        "lastUpdated": {
+          "type": {
+            "scalar": "date"
+          }
+        },
+        "production": {
+          "type": {
+            "nullable": {
+              "scalar": "string"
+            }
+          }
+        },
+        "rotten": {
+          "type": {
+            "nullable": {
+              "scalar": "int"
+            }
+          }
+        },
+        "viewer": {
+          "type": {
+            "object": "movies_tomatoes_viewer"
+          }
+        },
+        "website": {
+          "type": {
+            "nullable": {
+              "scalar": "string"
+            }
+          }
+        }
+      }
+    },
+    "movies_tomatoes_critic": {
+      "fields": {
+        "meter": {
+          "type": {
+            "nullable": {
+              "scalar": "int"
+            }
+          }
+        },
+        "numReviews": {
+          "type": {
+            "scalar": "int"
+          }
+        },
+        "rating": {
+          "type": {
+            "nullable": {
+              "scalar": "double"
+            }
+          }
+        }
+      }
+    },
+    "movies_tomatoes_viewer": {
+      "fields": {
+        "meter": {
+          "type": {
+            "scalar": "int"
+          }
+        },
+        "numReviews": {
+          "type": {
+            "scalar": "int"
+          }
+        },
+        "rating": {
+          "type": "extendedJSON"
+        }
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/fixtures/connector/sample_mflix/schema/sessions.json b/fixtures/connector/sample_mflix/schema/sessions.json
new file mode 100644
index 00000000..364b9050
--- /dev/null
+++ b/fixtures/connector/sample_mflix/schema/sessions.json
@@ -0,0 +1,29 @@
+{
+  "name": "sessions",
+  "collections": {
+    "sessions": {
+      "type": "sessions"
+    }
+  },
+  "objectTypes": {
+    "sessions": {
+      "fields": {
+        "_id": {
+          "type": {
+            "scalar": "objectId"
+          }
+        },
+        "jwt": {
+          "type": {
+            "scalar": "string"
+          }
+        },
+        "user_id": {
+          "type": {
+            "scalar": "string"
+          }
+        }
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/fixtures/connector/sample_mflix/schema/theaters.json b/fixtures/connector/sample_mflix/schema/theaters.json
new file mode 100644
index 00000000..df44678b
--- /dev/null
+++ b/fixtures/connector/sample_mflix/schema/theaters.json
@@ -0,0 +1,90 @@
+{
+  "name": "theaters",
+  "collections": {
+    "theaters": {
+      "type": "theaters"
+    }
+  },
+  "objectTypes": {
+    "theaters": {
+      "fields": {
+        "_id": {
+          "type": {
+            "scalar": "objectId"
+          }
+        },
+        "location": {
+          "type": {
+            "object": "theaters_location"
+          }
+        },
+        "theaterId": {
+          "type": {
+            "scalar": "int"
+          }
+        }
+      }
+    },
+    "theaters_location": {
+      "fields": {
+        "address": {
+          "type": {
+            "object": "theaters_location_address"
+          }
+        },
+        "geo": {
+          "type": {
+            "object": "theaters_location_geo"
+          }
+        }
+      }
+    },
+    "theaters_location_address": {
+      "fields": {
+        "city": {
+          "type": {
+            "scalar": "string"
+          }
+        },
+        "state": {
+          "type": {
+            "scalar": "string"
+          }
+        },
+        "street1": {
+          "type": {
+            "scalar": "string"
+          }
+        },
+        "street2": {
+          "type": {
+            "nullable": {
+              "scalar": "string"
+            }
+          }
+        },
+        "zipcode": {
+          "type": {
+            "scalar": "string"
+          }
+        }
+      }
+    },
+    "theaters_location_geo": {
+      "fields": {
+        "coordinates": {
+          "type": {
+            "arrayOf": {
+              "scalar": "double"
+            }
+          }
+        },
+        "type": {
+          "type": {
+            "scalar": "string"
+          }
+        }
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/fixtures/connector/sample_mflix/schema/users.json b/fixtures/connector/sample_mflix/schema/users.json
new file mode 100644
index 00000000..71e27cec
--- /dev/null
+++ b/fixtures/connector/sample_mflix/schema/users.json
@@ -0,0 +1,34 @@
+{
+  "name": "users",
+  "collections": {
+    "users": {
+      "type": "users"
+    }
+  },
+  "objectTypes": {
+    "users": {
+      "fields": {
+        "_id": {
+          "type": {
+            "scalar": "objectId"
+          }
+        },
+        "email": {
+          "type": {
+            "scalar": "string"
+          }
+        },
+        "name": {
+          "type": {
+            "scalar": "string"
+          }
+        },
+        "password": {
+          "type": {
+            "scalar": "string"
+          }
+        }
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/fixtures/ddn/subgraphs/chinook/commands/InsertArtist.hml b/fixtures/ddn/subgraphs/chinook/commands/InsertArtist.hml
index 6a726d4b..115a31bb 100644
--- a/fixtures/ddn/subgraphs/chinook/commands/InsertArtist.hml
+++ b/fixtures/ddn/subgraphs/chinook/commands/InsertArtist.hml
@@ -10,7 +10,7 @@ definition:
     - name: name
       type: String!
   source:
-    dataConnectorName: mongodb
+    dataConnectorName: chinook
     dataConnectorCommand:
       procedure: insertArtist
     argumentMapping:
@@ -42,7 +42,7 @@ definition:
     - name: n
       type: Int!
   dataConnectorTypeMapping:
-    - dataConnectorName: mongodb
+    - dataConnectorName: chinook
       dataConnectorObjectType: InsertArtist
       fieldMapping:
         ok: { column: { name: ok } }
diff --git a/fixtures/ddn/subgraphs/chinook/dataconnectors/mongodb-types.hml b/fixtures/ddn/subgraphs/chinook/dataconnectors/chinook-types.hml
similarity index 89%
rename from fixtures/ddn/subgraphs/chinook/dataconnectors/mongodb-types.hml
rename to fixtures/ddn/subgraphs/chinook/dataconnectors/chinook-types.hml
index cb62f8d9..fb4f6592 100644
--- a/fixtures/ddn/subgraphs/chinook/dataconnectors/mongodb-types.hml
+++ b/fixtures/ddn/subgraphs/chinook/dataconnectors/chinook-types.hml
@@ -10,7 +10,7 @@ definition:
 kind: DataConnectorScalarRepresentation
 version: v1
 definition:
-  dataConnectorName: mongodb
+  dataConnectorName: chinook
   dataConnectorScalarType: ObjectId
   representation: ObjectId
   graphql:
@@ -20,7 +20,7 @@ definition:
 kind: DataConnectorScalarRepresentation
 version: v1
 definition:
-  dataConnectorName: mongodb
+  dataConnectorName: chinook
   dataConnectorScalarType: Int
   representation: Int
   graphql:
@@ -30,7 +30,7 @@ definition:
 kind: DataConnectorScalarRepresentation
 version: v1
 definition:
-  dataConnectorName: mongodb
+  dataConnectorName: chinook
   dataConnectorScalarType: String
   representation: String
   graphql:
@@ -48,7 +48,7 @@ definition:
 kind: DataConnectorScalarRepresentation
 version: v1
 definition:
-  dataConnectorName: mongodb
+  dataConnectorName: chinook
   dataConnectorScalarType: ExtendedJSON
   representation: ExtendedJson
   graphql:
@@ -58,7 +58,7 @@ definition:
 kind: DataConnectorScalarRepresentation
 version: v1
 definition:
-  dataConnectorName: mongodb
+  dataConnectorName: chinook
   dataConnectorScalarType: Float
   representation: Float
   graphql:
diff --git a/fixtures/ddn/subgraphs/chinook/dataconnectors/mongodb.hml b/fixtures/ddn/subgraphs/chinook/dataconnectors/chinook.hml
similarity index 99%
rename from fixtures/ddn/subgraphs/chinook/dataconnectors/mongodb.hml
rename to fixtures/ddn/subgraphs/chinook/dataconnectors/chinook.hml
index af17bf72..40c6b0a3 100644
--- a/fixtures/ddn/subgraphs/chinook/dataconnectors/mongodb.hml
+++ b/fixtures/ddn/subgraphs/chinook/dataconnectors/chinook.hml
@@ -1,7 +1,7 @@
 kind: DataConnectorLink
 version: v1
 definition:
-  name: mongodb
+  name: chinook
   url:
     singleUrl:
       value: http://localhost:7130
diff --git a/fixtures/ddn/subgraphs/chinook/models/Album.hml b/fixtures/ddn/subgraphs/chinook/models/Album.hml
index 51854f13..f332e8a4 100644
--- a/fixtures/ddn/subgraphs/chinook/models/Album.hml
+++ b/fixtures/ddn/subgraphs/chinook/models/Album.hml
@@ -16,7 +16,7 @@ definition:
     typeName: App_Album
     inputTypeName: App_AlbumInput
   dataConnectorTypeMapping:
-    - dataConnectorName: mongodb
+    - dataConnectorName: chinook
       dataConnectorObjectType: Album
       fieldMapping:
         id:
@@ -52,7 +52,7 @@ version: v1
 definition:
   name: AlbumBoolExp
   objectType: Album
-  dataConnectorName: mongodb
+  dataConnectorName: chinook
   dataConnectorObjectType: Album
   comparableFields:
     - fieldName: id
@@ -77,7 +77,7 @@ definition:
   name: Album
   objectType: Album
   source:
-    dataConnectorName: mongodb
+    dataConnectorName: chinook
     collection: Album
   filterExpressionType: AlbumBoolExp
   orderableFields:
diff --git a/fixtures/ddn/subgraphs/chinook/models/Artist.hml b/fixtures/ddn/subgraphs/chinook/models/Artist.hml
index a3a8f7b6..971975ea 100644
--- a/fixtures/ddn/subgraphs/chinook/models/Artist.hml
+++ b/fixtures/ddn/subgraphs/chinook/models/Artist.hml
@@ -14,7 +14,7 @@ definition:
     typeName: App_Artist
     inputTypeName: App_ArtistInput
   dataConnectorTypeMapping:
-    - dataConnectorName: mongodb
+    - dataConnectorName: chinook
       dataConnectorObjectType: Artist
       fieldMapping:
         id:
@@ -46,7 +46,7 @@ version: v1
 definition:
   name: ArtistBoolExp
   objectType: Artist
-  dataConnectorName: mongodb
+  dataConnectorName: chinook
   dataConnectorObjectType: Artist
   comparableFields:
     - fieldName: id
@@ -68,7 +68,7 @@ definition:
   name: Artist
   objectType: Artist
   source:
-    dataConnectorName: mongodb
+    dataConnectorName: chinook
     collection: Artist
   filterExpressionType: ArtistBoolExp
   orderableFields:
diff --git a/fixtures/ddn/subgraphs/chinook/models/Customer.hml b/fixtures/ddn/subgraphs/chinook/models/Customer.hml
index 3de9bc1e..54917793 100644
--- a/fixtures/ddn/subgraphs/chinook/models/Customer.hml
+++ b/fixtures/ddn/subgraphs/chinook/models/Customer.hml
@@ -36,7 +36,7 @@ definition:
     typeName: App_Customer
     inputTypeName: App_CustomerInput
   dataConnectorTypeMapping:
-    - dataConnectorName: mongodb
+    - dataConnectorName: chinook
       dataConnectorObjectType: Customer
       fieldMapping:
         id:
@@ -112,7 +112,7 @@ version: v1
 definition:
   name: CustomerBoolExp
   objectType: Customer
-  dataConnectorName: mongodb
+  dataConnectorName: chinook
   dataConnectorObjectType: Customer
   comparableFields:
     - fieldName: id
@@ -167,7 +167,7 @@ definition:
   name: Customer
   objectType: Customer
   source:
-    dataConnectorName: mongodb
+    dataConnectorName: chinook
     collection: Customer
   filterExpressionType: CustomerBoolExp
   orderableFields:
diff --git a/fixtures/ddn/subgraphs/chinook/models/Employee.hml b/fixtures/ddn/subgraphs/chinook/models/Employee.hml
index 5610228a..a59f3d73 100644
--- a/fixtures/ddn/subgraphs/chinook/models/Employee.hml
+++ b/fixtures/ddn/subgraphs/chinook/models/Employee.hml
@@ -40,7 +40,7 @@ definition:
     typeName: App_Employee
     inputTypeName: App_EmployeeInput
   dataConnectorTypeMapping:
-    - dataConnectorName: mongodb
+    - dataConnectorName: chinook
       dataConnectorObjectType: Employee
       fieldMapping:
         id:
@@ -124,7 +124,7 @@ version: v1
 definition:
   name: EmployeeBoolExp
   objectType: Employee
-  dataConnectorName: mongodb
+  dataConnectorName: chinook
   dataConnectorObjectType: Employee
   comparableFields:
     - fieldName: id
@@ -185,7 +185,7 @@ definition:
   name: Employee
   objectType: Employee
   source:
-    dataConnectorName: mongodb
+    dataConnectorName: chinook
     collection: Employee
   filterExpressionType: EmployeeBoolExp
   orderableFields:
diff --git a/fixtures/ddn/subgraphs/chinook/models/Genre.hml b/fixtures/ddn/subgraphs/chinook/models/Genre.hml
index 81deb556..1af381cc 100644
--- a/fixtures/ddn/subgraphs/chinook/models/Genre.hml
+++ b/fixtures/ddn/subgraphs/chinook/models/Genre.hml
@@ -14,7 +14,7 @@ definition:
     typeName: App_Genre
     inputTypeName: App_GenreInput
   dataConnectorTypeMapping:
-    - dataConnectorName: mongodb
+    - dataConnectorName: chinook
       dataConnectorObjectType: Genre
       fieldMapping:
         id:
@@ -46,7 +46,7 @@ version: v1
 definition:
   name: GenreBoolExp
   objectType: Genre
-  dataConnectorName: mongodb
+  dataConnectorName: chinook
   dataConnectorObjectType: Genre
   comparableFields:
     - fieldName: id
@@ -68,7 +68,7 @@ definition:
   name: Genre
   objectType: Genre
   source:
-    dataConnectorName: mongodb
+    dataConnectorName: chinook
     collection: Genre
   filterExpressionType: GenreBoolExp
   orderableFields:
diff --git a/fixtures/ddn/subgraphs/chinook/models/Invoice.hml b/fixtures/ddn/subgraphs/chinook/models/Invoice.hml
index 38601434..2773af88 100644
--- a/fixtures/ddn/subgraphs/chinook/models/Invoice.hml
+++ b/fixtures/ddn/subgraphs/chinook/models/Invoice.hml
@@ -28,7 +28,7 @@ definition:
     typeName: App_Invoice
     inputTypeName: App_InvoiceInput
   dataConnectorTypeMapping:
-    - dataConnectorName: mongodb
+    - dataConnectorName: chinook
       dataConnectorObjectType: Invoice
       fieldMapping:
         id:
@@ -88,7 +88,7 @@ version: v1
 definition:
   name: InvoiceBoolExp
   objectType: Invoice
-  dataConnectorName: mongodb
+  dataConnectorName: chinook
   dataConnectorObjectType: Invoice
   comparableFields:
     - fieldName: id
@@ -131,7 +131,7 @@ definition:
   name: Invoice
   objectType: Invoice
   source:
-    dataConnectorName: mongodb
+    dataConnectorName: chinook
     collection: Invoice
   filterExpressionType: InvoiceBoolExp
   orderableFields:
diff --git a/fixtures/ddn/subgraphs/chinook/models/InvoiceLine.hml b/fixtures/ddn/subgraphs/chinook/models/InvoiceLine.hml
index 11cb9aee..f0259b38 100644
--- a/fixtures/ddn/subgraphs/chinook/models/InvoiceLine.hml
+++ b/fixtures/ddn/subgraphs/chinook/models/InvoiceLine.hml
@@ -20,7 +20,7 @@ definition:
     typeName: App_InvoiceLine
     inputTypeName: App_InvoiceLineInput
   dataConnectorTypeMapping:
-    - dataConnectorName: mongodb
+    - dataConnectorName: chinook
       dataConnectorObjectType: InvoiceLine
       fieldMapping:
         id:
@@ -64,7 +64,7 @@ version: v1
 definition:
   name: InvoiceLineBoolExp
   objectType: InvoiceLine
-  dataConnectorName: mongodb
+  dataConnectorName: chinook
   dataConnectorObjectType: InvoiceLine
   comparableFields:
     - fieldName: id
@@ -95,7 +95,7 @@ definition:
   name: InvoiceLine
   objectType: InvoiceLine
   source:
-    dataConnectorName: mongodb
+    dataConnectorName: chinook
     collection: InvoiceLine
   filterExpressionType: InvoiceLineBoolExp
   orderableFields:
diff --git a/fixtures/ddn/subgraphs/chinook/models/MediaType.hml b/fixtures/ddn/subgraphs/chinook/models/MediaType.hml
index 1748f0f3..fab30969 100644
--- a/fixtures/ddn/subgraphs/chinook/models/MediaType.hml
+++ b/fixtures/ddn/subgraphs/chinook/models/MediaType.hml
@@ -14,7 +14,7 @@ definition:
     typeName: App_MediaType
     inputTypeName: App_MediaTypeInput
   dataConnectorTypeMapping:
-    - dataConnectorName: mongodb
+    - dataConnectorName: chinook
       dataConnectorObjectType: MediaType
       fieldMapping:
         id:
@@ -46,7 +46,7 @@ version: v1
 definition:
   name: MediaTypeBoolExp
   objectType: MediaType
-  dataConnectorName: mongodb
+  dataConnectorName: chinook
   dataConnectorObjectType: MediaType
   comparableFields:
     - fieldName: id
@@ -68,7 +68,7 @@ definition:
   name: MediaType
   objectType: MediaType
   source:
-    dataConnectorName: mongodb
+    dataConnectorName: chinook
     collection: MediaType
   filterExpressionType: MediaTypeBoolExp
   orderableFields:
diff --git a/fixtures/ddn/subgraphs/chinook/models/Playlist.hml b/fixtures/ddn/subgraphs/chinook/models/Playlist.hml
index 3b90174b..d5ae7143 100644
--- a/fixtures/ddn/subgraphs/chinook/models/Playlist.hml
+++ b/fixtures/ddn/subgraphs/chinook/models/Playlist.hml
@@ -14,7 +14,7 @@ definition:
     typeName: App_Playlist
     inputTypeName: App_PlaylistInput
   dataConnectorTypeMapping:
-    - dataConnectorName: mongodb
+    - dataConnectorName: chinook
       dataConnectorObjectType: Playlist
       fieldMapping:
         id:
@@ -46,7 +46,7 @@ version: v1
 definition:
   name: PlaylistBoolExp
   objectType: Playlist
-  dataConnectorName: mongodb
+  dataConnectorName: chinook
   dataConnectorObjectType: Playlist
   comparableFields:
     - fieldName: id
@@ -68,7 +68,7 @@ definition:
   name: Playlist
   objectType: Playlist
   source:
-    dataConnectorName: mongodb
+    dataConnectorName: chinook
     collection: Playlist
   filterExpressionType: PlaylistBoolExp
   orderableFields:
diff --git a/fixtures/ddn/subgraphs/chinook/models/PlaylistTrack.hml b/fixtures/ddn/subgraphs/chinook/models/PlaylistTrack.hml
index d0b0eed9..20c16e5e 100644
--- a/fixtures/ddn/subgraphs/chinook/models/PlaylistTrack.hml
+++ b/fixtures/ddn/subgraphs/chinook/models/PlaylistTrack.hml
@@ -14,7 +14,7 @@ definition:
     typeName: App_PlaylistTrack
     inputTypeName: App_PlaylistTrackInput
   dataConnectorTypeMapping:
-    - dataConnectorName: mongodb
+    - dataConnectorName: chinook
       dataConnectorObjectType: PlaylistTrack
       fieldMapping:
         id:
@@ -46,7 +46,7 @@ version: v1
 definition:
   name: PlaylistTrackBoolExp
   objectType: PlaylistTrack
-  dataConnectorName: mongodb
+  dataConnectorName: chinook
   dataConnectorObjectType: PlaylistTrack
   comparableFields:
     - fieldName: id
@@ -68,7 +68,7 @@ definition:
   name: PlaylistTrack
   objectType: PlaylistTrack
   source:
-    dataConnectorName: mongodb
+    dataConnectorName: chinook
     collection: PlaylistTrack
   filterExpressionType: PlaylistTrackBoolExp
   orderableFields:
diff --git a/fixtures/ddn/subgraphs/chinook/models/Track.hml b/fixtures/ddn/subgraphs/chinook/models/Track.hml
index 69a1881e..1b684e18 100644
--- a/fixtures/ddn/subgraphs/chinook/models/Track.hml
+++ b/fixtures/ddn/subgraphs/chinook/models/Track.hml
@@ -28,7 +28,7 @@ definition:
     typeName: App_Track
     inputTypeName: App_TrackInput
   dataConnectorTypeMapping:
-    - dataConnectorName: mongodb
+    - dataConnectorName: chinook
       dataConnectorObjectType: Track
       fieldMapping:
         id:
@@ -88,7 +88,7 @@ version: v1
 definition:
   name: TrackBoolExp
   objectType: Track
-  dataConnectorName: mongodb
+  dataConnectorName: chinook
   dataConnectorObjectType: Track
   comparableFields:
     - fieldName: id
@@ -131,7 +131,7 @@ definition:
   name: Track
   objectType: Track
   source:
-    dataConnectorName: mongodb
+    dataConnectorName: chinook
     collection: Track
   filterExpressionType: TrackBoolExp
   orderableFields:
diff --git a/fixtures/ddn/subgraphs/sample_mflix/dataconnectors/.gitkeep b/fixtures/ddn/subgraphs/sample_mflix/dataconnectors/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/fixtures/ddn/subgraphs/sample_mflix/dataconnectors/sample_mflix-types.hml b/fixtures/ddn/subgraphs/sample_mflix/dataconnectors/sample_mflix-types.hml
new file mode 100644
index 00000000..39bb6889
--- /dev/null
+++ b/fixtures/ddn/subgraphs/sample_mflix/dataconnectors/sample_mflix-types.hml
@@ -0,0 +1,83 @@
+---
+kind: ScalarType
+version: v1
+definition:
+  name: ObjectId
+  graphql:
+    typeName: App_ObjectId
+
+---
+kind: ScalarType
+version: v1
+definition:
+  name: Date
+  graphql:
+    typeName: App_Date
+
+---
+kind: DataConnectorScalarRepresentation
+version: v1
+definition:
+  dataConnectorName: sample_mflix
+  dataConnectorScalarType: ObjectId
+  representation: ObjectId
+  graphql:
+    comparisonExpressionTypeName: App_ObjectIdComparisonExp
+
+---
+kind: DataConnectorScalarRepresentation
+version: v1
+definition:
+  dataConnectorName: sample_mflix
+  dataConnectorScalarType: Date
+  representation: Date
+  graphql:
+    comparisonExpressionTypeName: App_DateComparisonExp
+
+---
+kind: DataConnectorScalarRepresentation
+version: v1
+definition:
+  dataConnectorName: sample_mflix
+  dataConnectorScalarType: String
+  representation: String
+  graphql:
+    comparisonExpressionTypeName: App_StringComparisonExp
+
+---
+kind: ScalarType
+version: v1
+definition:
+  name: ExtendedJson
+  graphql:
+    typeName: App_ExtendedJson
+
+---
+kind: DataConnectorScalarRepresentation
+version: v1
+definition:
+  dataConnectorName: sample_mflix
+  dataConnectorScalarType: Int
+  representation: Int
+  graphql:
+    comparisonExpressionTypeName: App_IntComparisonExp
+
+---
+kind: DataConnectorScalarRepresentation
+version: v1
+definition:
+  dataConnectorName: sample_mflix
+  dataConnectorScalarType: ExtendedJSON
+  representation: ExtendedJson
+  graphql:
+    comparisonExpressionTypeName: App_ExtendedJsonComparisonExp
+
+---
+kind: DataConnectorScalarRepresentation
+version: v1
+definition:
+  dataConnectorName: sample_mflix
+  dataConnectorScalarType: Float
+  representation: Float
+  graphql:
+    comparisonExpressionTypeName: App_FloatComparisonExp
diff --git a/fixtures/ddn/subgraphs/sample_mflix/dataconnectors/sample_mflix.hml b/fixtures/ddn/subgraphs/sample_mflix/dataconnectors/sample_mflix.hml
new file mode 100644
index 00000000..27bd7bfa
--- /dev/null
+++ b/fixtures/ddn/subgraphs/sample_mflix/dataconnectors/sample_mflix.hml
@@ -0,0 +1,904 @@
+kind: DataConnectorLink
+version: v1
+definition:
+  name: sample_mflix
+  url:
+    singleUrl:
+      value: http://localhost:7131
+  schema:
+    version: v0.1
+    schema:
+      scalar_types:
+        BinData:
+          aggregate_functions:
+            count:
+              result_type:
+                type: named
+                name: Int
+          comparison_operators:
+            _eq:
+              type: equal
+            _neq:
+              type: custom
+              argument_type:
+                type: named
+                name: BinData
+        Boolean:
+          aggregate_functions:
+            count:
+              result_type:
+                type: named
+                name: Int
+          comparison_operators:
+            _eq:
+              type: equal
+            _neq:
+              type: custom
+              argument_type:
+                type: named
+                name: Boolean
+        Date:
+          aggregate_functions:
+            count:
+              result_type:
+                type: named
+                name: Int
+            max:
+              result_type:
+                type: named
+                name: Date
+            min:
+              result_type:
+                type: named
+                name: Date
+          comparison_operators:
+            _eq:
+              type: equal
+            _gt:
+              type: custom
+              argument_type:
+                type: named
+                name: Date
+            _gte:
+              type: custom
+              argument_type:
+                type: named
+                name: Date
+            _lt:
+              type: custom
+              argument_type:
+                type: named
+                name: Date
+            _lte:
+              type: custom
+              argument_type:
+                type: named
+                name: Date
+            _neq:
+              type: custom
+              argument_type:
+                type: named
+                name: Date
+        DbPointer:
+          aggregate_functions:
+            count:
+              result_type:
+                type: named
+                name: Int
+          comparison_operators:
+            _eq:
+              type: equal
+            _neq:
+              type: custom
+              argument_type:
+                type: named
+                name: DbPointer
+        Decimal:
+          aggregate_functions:
+            avg:
+              result_type:
+                type: named
+                name: Decimal
+            count:
+              result_type:
+                type: named
+                name: Int
+            max:
+              result_type:
+                type: named
+                name: Decimal
+            min:
+              result_type:
+                type: named
+                name: Decimal
+            sum:
+              result_type:
+                type: named
+                name: Decimal
+          comparison_operators:
+            _eq:
+              type: equal
+            _gt:
+              type: custom
+              argument_type:
+                type: named
+                name: Decimal
+            _gte:
+              type: custom
+              argument_type:
+                type: named
+                name: Decimal
+            _lt:
+              type: custom
+              argument_type:
+                type: named
+                name: Decimal
+            _lte:
+              type: custom
+              argument_type:
+                type: named
+                name: Decimal
+            _neq:
+              type: custom
+              argument_type:
+                type: named
+                name: Decimal
+        ExtendedJSON:
+          aggregate_functions: {}
+          comparison_operators: {}
+        Float:
+          aggregate_functions:
+            avg:
+              result_type:
+                type: named
+                name: Float
+            count:
+              result_type:
+                type: named
+                name: Int
+            max:
+              result_type:
+                type: named
+                name: Float
+            min:
+              result_type:
+                type: named
+                name: Float
+            sum:
+              result_type:
+                type: named
+                name: Float
+          comparison_operators:
+            _eq:
+              type: equal
+            _gt:
+              type: custom
+              argument_type:
+                type: named
+                name: Float
+            _gte:
+              type: custom
+              argument_type:
+                type: named
+                name: Float
+            _lt:
+              type: custom
+              argument_type:
+                type: named
+                name: Float
+            _lte:
+              type: custom
+              argument_type:
+                type: named
+                name: Float
+            _neq:
+              type: custom
+              argument_type:
+                type: named
+                name: Float
+        Int:
+          aggregate_functions:
+            avg:
+              result_type:
+                type: named
+                name: Int
+            count:
+              result_type:
+                type: named
+                name: Int
+            max:
+              result_type:
+                type: named
+                name: Int
+            min:
+              result_type:
+                type: named
+                name: Int
+            sum:
+              result_type:
+                type: named
+                name: Int
+          comparison_operators:
+            _eq:
+              type: equal
+            _gt:
+              type: custom
+              argument_type:
+                type: named
+                name: Int
+            _gte:
+              type: custom
+              argument_type:
+                type: named
+                name: Int
+            _lt:
+              type: custom
+              argument_type:
+                type: named
+                name: Int
+            _lte:
+              type: custom
+              argument_type:
+                type: named
+                name: Int
+            _neq:
+              type: custom
+              argument_type:
+                type: named
+                name: Int
+        Javascript:
+          aggregate_functions:
+            count:
+              result_type:
+                type: named
+                name: Int
+          comparison_operators: {}
+        JavascriptWithScope:
+          aggregate_functions:
+            count:
+              result_type:
+                type: named
+                name: Int
+          comparison_operators: {}
+        Long:
+          aggregate_functions:
+            avg:
+              result_type:
+                type: named
+                name: Long
+            count:
+              result_type:
+                type: named
+                name: Int
+            max:
+              result_type:
+                type: named
+                name: Long
+            min:
+              result_type:
+                type: named
+                name: Long
+            sum:
+              result_type:
+                type: named
+                name: Long
+          comparison_operators:
+            _eq:
+              type: equal
+            _gt:
+              type: custom
+              argument_type:
+                type: named
+                name: Long
+            _gte:
+              type: custom
+              argument_type:
+                type: named
+                name: Long
+            _lt:
+              type: custom
+              argument_type:
+                type: named
+                name: Long
+            _lte:
+              type: custom
+              argument_type:
+                type: named
+                name: Long
+            _neq:
+              type: custom
+              argument_type:
+                type: named
+                name: Long
+        MaxKey:
+          aggregate_functions:
+            count:
+              result_type:
+                type: named
+                name: Int
+          comparison_operators:
+            _eq:
+              type: equal
+            _neq:
+              type: custom
+              argument_type:
+                type: named
+                name: MaxKey
+        MinKey:
+          aggregate_functions:
+            count:
+              result_type:
+                type: named
+                name: Int
+          comparison_operators:
+            _eq:
+              type: equal
+            _neq:
+              type: custom
+              argument_type:
+                type: named
+                name: MinKey
+        "Null":
+          aggregate_functions:
+            count:
+              result_type:
+                type: named
+                name: Int
+          comparison_operators:
+            _eq:
+              type: equal
+            _neq:
+              type: custom
+              argument_type:
+                type: named
+                name: "Null"
+        ObjectId:
+          aggregate_functions:
+            count:
+              result_type:
+                type: named
+                name: Int
+          comparison_operators:
+            _eq:
+              type: equal
+            _neq:
+              type: custom
+              argument_type:
+                type: named
+                name: ObjectId
+        Regex:
+          aggregate_functions:
+            count:
+              result_type:
+                type: named
+                name: Int
+          comparison_operators: {}
+        String:
+          aggregate_functions:
+            count:
+              result_type:
+                type: named
+                name: Int
+            max:
+              result_type:
+                type: named
+                name: String
+            min:
+              result_type:
+                type: named
+                name: String
+          comparison_operators:
+            _eq:
+              type: equal
+            _gt:
+              type: custom
+              argument_type:
+                type: named
+                name: String
+            _gte:
+              type: custom
+              argument_type:
+                type: named
+                name: String
+            _iregex:
+              type: custom
+              argument_type:
+                type: named
+                name: String
+            _lt:
+              type: custom
+              argument_type:
+                type: named
+                name: String
+            _lte:
+              type: custom
+              argument_type:
+                type: named
+                name: String
+            _neq:
+              type: custom
+              argument_type:
+                type: named
+                name: String
+            _regex:
+              type: custom
+              argument_type:
+                type: named
+                name: String
+        Symbol:
+          aggregate_functions:
+            count:
+              result_type:
+                type: named
+                name: Int
+          comparison_operators:
+            _eq:
+              type: equal
+            _neq:
+              type: custom
+              argument_type:
+                type: named
+                name: Symbol
+        Timestamp:
+          aggregate_functions:
+            count:
+              result_type:
+                type: named
+                name: Int
+            max:
+              result_type:
+                type: named
+                name: Timestamp
+            min:
+              result_type:
+                type: named
+                name: Timestamp
+          comparison_operators:
+            _eq:
+              type: equal
+            _gt:
+              type: custom
+              argument_type:
+                type: named
+                name: Timestamp
+            _gte:
+              type: custom
+              argument_type:
+                type: named
+                name: Timestamp
+            _lt:
+              type: custom
+              argument_type:
+                type: named
+                name: Timestamp
+            _lte:
+              type: custom
+              argument_type:
+                type: named
+                name: Timestamp
+            _neq:
+              type: custom
+              argument_type:
+                type: named
+                name: Timestamp
+        Undefined:
+          aggregate_functions:
+            count:
+              result_type:
+                type: named
+                name: Int
+          comparison_operators:
+            _eq:
+              type: equal
+            _neq:
+              type: custom
+              argument_type:
+                type: named
+                name: Undefined
+      object_types:
+        comments:
+          fields:
+            _id:
+              type:
+                type: named
+                name: ObjectId
+            date:
+              type:
+                type: named
+                name: Date
+            email:
+              type:
+                type: named
+                name: String
+            movie_id:
+              type:
+                type: named
+                name: ObjectId
+            name:
+              type:
+                type: named
+                name: String
+            text:
+              type:
+                type: named
+                name: String
+        movies:
+          fields:
+            _id:
+              type:
+                type: named
+                name: ObjectId
+            awards:
+              type:
+                type: named
+                name: movies_awards
+            cast:
+              type:
+                type: array
+                element_type:
+                  type: named
+                  name: String
+            countries:
+              type:
+                type: array
+                element_type:
+                  type: named
+                  name: String
+            directors:
+              type:
+                type: array
+                element_type:
+                  type: named
+                  name: String
+            fullplot:
+              type:
+                type: nullable
+                underlying_type:
+                  type: named
+                  name: String
+            genres:
+              type:
+                type: array
+                element_type:
+                  type: named
+                  name: String
+            imdb:
+              type:
+                type: named
+                name: movies_imdb
+            languages:
+              type:
+                type: array
+                element_type:
+                  type: named
+                  name: String
+            lastupdated:
+              type:
+                type: named
+                name: String
+            metacritic:
+              type:
+                type: nullable
+                underlying_type:
+                  type: named
+                  name: Int
+            num_mflix_comments:
+              type:
+                type: nullable
+                underlying_type:
+                  type: named
+                  name: Int
+            plot:
+              type:
+                type: nullable
+                underlying_type:
+                  type: named
+                  name: String
+            poster:
+              type:
+                type: nullable
+                underlying_type:
+                  type: named
+                  name: String
+            rated:
+              type:
+                type: nullable
+                underlying_type:
+                  type: named
+                  name: String
+            released:
+              type:
+                type: named
+                name: Date
+            runtime:
+              type:
+                type: named
+                name: Int
+            title:
+              type:
+                type: named
+                name: String
+            tomatoes:
+              type:
+                type: nullable
+                underlying_type:
+                  type: named
+                  name: movies_tomatoes
+            type:
+              type:
+                type: named
+                name: String
+            writers:
+              type:
+                type: array
+                element_type:
+                  type: named
+                  name: String
+            year:
+              type:
+                type: named
+                name: Int
+        movies_awards:
+          fields:
+            nominations:
+              type:
+                type: named
+                name: Int
+            text:
+              type:
+                type: named
+                name: String
+            wins:
+              type:
+                type: named
+                name: Int
+        movies_imdb:
+          fields:
+            id:
+              type:
+                type: named
+                name: Int
+            rating:
+              type:
+                type: nullable
+                underlying_type:
+                  type: named
+                  name: ExtendedJSON
+            votes:
+              type:
+                type: named
+                name: Int
+        movies_tomatoes:
+          fields:
+            boxOffice:
+              type:
+                type: nullable
+                underlying_type:
+                  type: named
+                  name: String
+            consensus:
+              type:
+                type: nullable
+                underlying_type:
+                  type: named
+                  name: String
+            critic:
+              type:
+                type: nullable
+                underlying_type:
+                  type: named
+                  name: movies_tomatoes_critic
+            dvd:
+              type:
+                type: nullable
+                underlying_type:
+                  type: named
+                  name: Date
+            fresh:
+              type:
+                type: nullable
+                underlying_type:
+                  type: named
+                  name: Int
+            lastUpdated:
+              type:
+                type: named
+                name: Date
+            production:
+              type:
+                type: nullable
+                underlying_type:
+                  type: named
+                  name: String
+            rotten:
+              type:
+                type: nullable
+                underlying_type:
+                  type: named
+                  name: Int
+            viewer:
+              type:
+                type: named
+                name: movies_tomatoes_viewer
+            website:
+              type:
+                type: nullable
+                underlying_type:
+                  type: named
+                  name: String
+        movies_tomatoes_critic:
+          fields:
+            meter:
+              type:
+                type: named
+                name: Int
+            numReviews:
+              type:
+                type: named
+                name: Int
+            rating:
+              type:
+                type: nullable
+                underlying_type:
+                  type: named
+                  name: ExtendedJSON
+        movies_tomatoes_viewer:
+          fields:
+            meter:
+              type:
+                type: named
+                name: Int
+            numReviews:
+              type:
+                type: named
+                name: Int
+            rating:
+              type:
+                type: nullable
+                underlying_type:
+                  type: named
+                  name: ExtendedJSON
+        sessions:
+          fields:
+            _id:
+              type:
+                type: named
+                name: ObjectId
+            jwt:
+              type:
+                type: named
+                name: String
+            user_id:
+              type:
+                type: named
+                name: String
+        theaters:
+          fields:
+            _id:
+              type:
+                type: named
+                name: ObjectId
+            location:
+              type:
+                type: named
+                name: theaters_location
+            theaterId:
+              type:
+                type: named
+                name: Int
+        theaters_location:
+          fields:
+            address:
+              type:
+                type: named
+                name: theaters_location_address
+            geo:
+              type:
+                type: named
+                name: theaters_location_geo
+        theaters_location_address:
+          fields:
+            city:
+              type:
+                type: named
+                name: String
+            state:
+              type:
+                type: named
+                name: String
+            street1:
+              type:
+                type: named
+                name: String
+            street2:
+              type:
+                type: nullable
+                underlying_type:
+                  type: named
+                  name: String
+            zipcode:
+              type:
+                type: named
+                name: String
+        theaters_location_geo:
+          fields:
+            coordinates:
+              type:
+                type: array
+                element_type:
+                  type: named
+                  name: Float
+            type:
+              type:
+                type: named
+                name: String
+        users:
+          fields:
+            _id:
+              type:
+                type: named
+                name: ObjectId
+            email:
+              type:
+                type: named
+                name: String
+            name:
+              type:
+                type: named
+                name: String
+            password:
+              type:
+                type: named
+                name: String
+      collections:
+        - name: comments
+          arguments: {}
+          type: comments
+          uniqueness_constraints:
+            comments_id:
+              unique_columns:
+                - _id
+          foreign_keys: {}
+        - name: movies
+          arguments: {}
+          type: movies
+          uniqueness_constraints:
+            movies_id:
+              unique_columns:
+                - _id
+          foreign_keys: {}
+        - name: sessions
+          arguments: {}
+          type: sessions
+          uniqueness_constraints:
+            sessions_id:
+              unique_columns:
+                - _id
+          foreign_keys: {}
+        - name: theaters
+          arguments: {}
+          type: theaters
+          uniqueness_constraints:
+            theaters_id:
+              unique_columns:
+                - _id
+          foreign_keys: {}
+        - name: users
+          arguments: {}
+          type: users
+          uniqueness_constraints:
+            users_id:
+              unique_columns:
+                - _id
+          foreign_keys: {}
+      functions: []
+      procedures: []
+    capabilities:
+      version: 0.1.1
+      capabilities:
+        query:
+          aggregates: {}
+          variables: {}
+          explain: {}
+        mutation: {}
+        relationships: {}
diff --git a/fixtures/ddn/subgraphs/sample_mflix/models/Comments.hml b/fixtures/ddn/subgraphs/sample_mflix/models/Comments.hml
new file mode 100644
index 00000000..0c6964e7
--- /dev/null
+++ b/fixtures/ddn/subgraphs/sample_mflix/models/Comments.hml
@@ -0,0 +1,138 @@
+---
+kind: ObjectType
+version: v1
+definition:
+  name: Comments
+  fields:
+    - name: id
+      type: ObjectId!
+    - name: date
+      type: Date!
+    - name: email
+      type: String!
+    - name: movieId
+      type: ObjectId!
+    - name: name
+      type: String!
+    - name: text
+      type: String!
+  graphql:
+    typeName: App_Comments
+    inputTypeName: App_CommentsInput
+  dataConnectorTypeMapping:
+    - dataConnectorName: sample_mflix
+      dataConnectorObjectType: comments
+      fieldMapping:
+        id:
+          column:
+            name: _id
+        date:
+          column:
+            name: date
+        email:
+          column:
+            name: email
+        movieId:
+          column:
+            name: movie_id
+        name:
+          column:
+            name: name
+        text:
+          column:
+            name: text
+
+---
+kind: TypePermissions
+version: v1
+definition:
+  typeName: Comments
+  permissions:
+    - role: admin
+      output:
+        allowedFields:
+          - id
+          - date
+          - email
+          - movieId
+          - name
+          - text
+
+---
+kind: ObjectBooleanExpressionType
+version: v1
+definition:
+  name: CommentsBoolExp
+  objectType: Comments
+  dataConnectorName: sample_mflix
+  dataConnectorObjectType: comments
+  comparableFields:
+    - fieldName: id
+      operators:
+        enableAll: true
+    - fieldName: date
+      operators:
+        enableAll: true
+    - fieldName: email
+      operators:
+        enableAll: true
+    - fieldName: movieId
+      operators:
+        enableAll: true
+    - fieldName: name
+      operators:
+        enableAll: true
+    - fieldName: text
+      operators:
+        enableAll: true
+  graphql:
+    typeName: App_CommentsBoolExp
+
+---
+kind: Model
+version: v1
+definition:
+  name: Comments
+  objectType: Comments
+  source:
+    dataConnectorName: sample_mflix
+    collection: comments
+  filterExpressionType: CommentsBoolExp
+  orderableFields:
+    - fieldName: id
+      orderByDirections:
+        enableAll: true
+    - fieldName: date
+      orderByDirections:
+        enableAll: true
+    - fieldName: email
+      orderByDirections:
+        enableAll: true
+    - fieldName: movieId
+      orderByDirections:
+        enableAll: true
+    - fieldName: name
+      orderByDirections:
+        enableAll: true
+    - fieldName: text
+      orderByDirections:
+        enableAll: true
+  graphql:
+    selectMany:
+      queryRootField: comments
+    selectUniques:
+      - queryRootField: commentsById
+        uniqueIdentifier:
+          - id
+    orderByExpressionType: App_CommentsOrderBy
+
+---
+kind: ModelPermissions
+version: v1
+definition:
+  modelName: Comments
+  permissions:
+    - role: admin
+      select:
+        filter: null
+
diff --git a/fixtures/ddn/subgraphs/sample_mflix/models/Movies.hml b/fixtures/ddn/subgraphs/sample_mflix/models/Movies.hml
new file mode 100644
index 00000000..9f144777
--- /dev/null
+++ b/fixtures/ddn/subgraphs/sample_mflix/models/Movies.hml
@@ -0,0 +1,511 @@
+---
+kind: ObjectType
+version: v1
+definition:
+  name: MoviesAwards
+  fields:
+    - name: nominations
+      type: Int!
+    - name: text
+      type: String!
+    - name: wins
+      type: Int!
+  graphql:
+    typeName: App_MoviesAwards
+    inputTypeName: App_MoviesAwardsInput
+  dataConnectorTypeMapping:
+    - dataConnectorName: sample_mflix
+      dataConnectorObjectType: movies_awards
+
+---
+kind: TypePermissions
+version: v1
+definition:
+  typeName: MoviesAwards
+  permissions:
+    - role: admin
+      output:
+        allowedFields:
+          - nominations
+          - text
+          - wins
+
+---
+kind: ObjectType
+version: v1
+definition:
+  name: MoviesImdb
+  fields:
+    - name: id
+      type: Int!
+    - name: rating
+      type: ExtendedJson
+    - name: votes
+      type: Int!
+  graphql:
+    typeName: App_MoviesImdb
+    inputTypeName: App_MoviesImdbInput
+  dataConnectorTypeMapping:
+    - dataConnectorName: sample_mflix
+      dataConnectorObjectType: movies_imdb
+
+---
+kind: TypePermissions
+version: v1
+definition:
+  typeName: MoviesImdb
+  permissions:
+    - role: admin
+      output:
+        allowedFields:
+          - id
+          - rating
+          - votes
+
+---
+kind: ObjectType
+version: v1
+definition:
+  name: MoviesTomatoesCritic
+  fields:
+    - name: meter
+      type: Int!
+    - name: numReviews
+      type: Int!
+    - name: rating
+      type: ExtendedJson
+  graphql:
+    typeName: App_MoviesTomatoesCritic
+    inputTypeName: App_MoviesTomatoesCriticInput
+  dataConnectorTypeMapping:
+    - dataConnectorName: sample_mflix
+      dataConnectorObjectType: movies_tomatoes_critic
+
+---
+kind: TypePermissions
+version: v1
+definition:
+  typeName: MoviesTomatoesCritic
+  permissions:
+    - role: admin
+      output:
+        allowedFields:
+          - meter
+          - numReviews
+          - rating
+
+---
+kind: ObjectType
+version: v1
+definition:
+  name: MoviesTomatoesViewer
+  fields:
+    - name: meter
+      type: Int!
+    - name: numReviews
+      type: Int!
+    - name: rating
+      type: ExtendedJson
+  graphql:
+    typeName: App_MoviesTomatoesViewer
+    inputTypeName: App_MoviesTomatoesViewerInput
+  dataConnectorTypeMapping:
+    - dataConnectorName: sample_mflix
+      dataConnectorObjectType: movies_tomatoes_viewer
+
+---
+kind: TypePermissions
+version: v1
+definition:
+  typeName: MoviesTomatoesViewer
+  permissions:
+    - role: admin
+      output:
+        allowedFields:
+          - meter
+          - numReviews
+          - rating
+
+---
+kind: ObjectType
+version: v1
+definition:
+  name: MoviesTomatoes
+  fields:
+    - name: boxOffice
+      type: String
+    - name: consensus
+      type: String
+    - name: critic
+      type: MoviesTomatoesCritic
+    - name: dvd
+      type: Date
+    - name: fresh
+      type: Int
+    - name: lastUpdated
+      type: Date!
+    - name: production
+      type: String
+    - name: rotten
+      type: Int
+    - name: viewer
+      type: MoviesTomatoesViewer!
+    - name: website
+      type: String
+  graphql:
+    typeName: App_MoviesTomatoes
+    inputTypeName: App_MoviesTomatoesInput
+  dataConnectorTypeMapping:
+    - dataConnectorName: sample_mflix
+      dataConnectorObjectType: movies_tomatoes
+
+---
+kind: TypePermissions
+version: v1
+definition:
+  typeName: MoviesTomatoes
+  permissions:
+    - role: admin
+      output:
+        allowedFields:
+          - boxOffice
+          - consensus
+          - critic
+          - dvd
+          - fresh
+          - lastUpdated
+          - production
+          - rotten
+          - viewer
+          - website
+
+---
+kind: ObjectType
+version: v1
+definition:
+  name: Movies
+  fields:
+    - name: id
+      type: ObjectId!
+    - name: awards
+      type: MoviesAwards!
+    - name: cast
+      type: "[String!]!"
+    - name: countries
+      type: "[String!]!"
+    - name: directors
+      type: "[String!]!"
+    - name: fullplot
+      type: String
+    - name: genres
+      type: "[String!]!"
+    - name: imdb
+      type: MoviesImdb!
+    - name: languages
+      type: "[String!]!"
+    - name: lastupdated
+      type: String!
+    - name: metacritic
+      type: Int
+    - name: numMflixComments
+      type: Int
+    - name: plot
+      type: String
+    - name: poster
+      type: String
+    - name: rated
+      type: String
+    - name: released
+      type: Date!
+    - name: runtime
+      type: Int!
+    - name: title
+      type: String!
+    - name: tomatoes
+      type: MoviesTomatoes
+    - name: type
+      type: String!
+    - name: writers
+      type: "[String!]!"
+    - name: year
+      type: Int!
+  graphql:
+    typeName: App_Movies
+    inputTypeName: App_MoviesInput
+  dataConnectorTypeMapping:
+    - dataConnectorName: sample_mflix
+      dataConnectorObjectType: movies
+      fieldMapping:
+        id:
+          column:
+            name: _id
+        awards:
+          column:
+            name: awards
+        cast:
+          column:
+            name: cast
+        countries:
+          column:
+            name: countries
+        directors:
+          column:
+            name: directors
+        fullplot:
+          column:
+            name: fullplot
+        genres:
+          column:
+            name: genres
+        imdb:
+          column:
+            name: imdb
+        languages:
+          column:
+            name: languages
+        lastupdated:
+          column:
+            name: lastupdated
+        metacritic:
+          column:
+            name: metacritic
+        numMflixComments:
+          column:
+            name: num_mflix_comments
+        plot:
+          column:
+            name: plot
+        poster:
+          column:
+            name: poster
+        rated:
+          column:
+            name: rated
+        released:
+          column:
+            name: released
+        runtime:
+          column:
+            name: runtime
+        title:
+          column:
+            name: title
+        tomatoes:
+          column:
+            name: tomatoes
+        type:
+          column:
+            name: type
+        writers:
+          column:
+            name: writers
+        year:
+          column:
+            name: year
+
+---
+kind: TypePermissions
+version: v1
+definition:
+  typeName: Movies
+  permissions:
+    - role: admin
+      output:
+        allowedFields:
+          - id
+          - awards
+          - cast
+          - countries
+          - directors
+          - fullplot
+          - genres
+          - imdb
+          - languages
+          - lastupdated
+          - metacritic
+          - numMflixComments
+          - plot
+          - poster
+          - rated
+          - released
+          - runtime
+          - title
+          - tomatoes
+          - type
+          - writers
+          - year
+
+---
+kind: ObjectBooleanExpressionType
+version: v1
+definition:
+  name: MoviesBoolExp
+  objectType: Movies
+  dataConnectorName: sample_mflix
+  dataConnectorObjectType: movies
+  comparableFields:
+    - fieldName: id
+      operators:
+        enableAll: true
+    - fieldName: awards
+      operators:
+        enableAll: true
+    - fieldName: cast
+      operators:
+        enableAll: true
+    - fieldName: countries
+      operators:
+        enableAll: true
+    - fieldName: directors
+      operators:
+        enableAll: true
+    - fieldName: fullplot
+      operators:
+        enableAll: true
+    - fieldName: genres
+      operators:
+        enableAll: true
+    - fieldName: imdb
+      operators:
+        enableAll: true
+    - fieldName: languages
+      operators:
+        enableAll: true
+    - fieldName: lastupdated
+      operators:
+        enableAll: true
+    - fieldName: metacritic
+      operators:
+        enableAll: true
+    - fieldName: numMflixComments
+      operators:
+        enableAll: true
+    - fieldName: plot
+      operators:
+        enableAll: true
+    - fieldName: poster
+      operators:
+        enableAll: true
+    - fieldName: rated
+      operators:
+        enableAll: true
+    - fieldName: released
+      operators:
+        enableAll: true
+    - fieldName: runtime
+      operators:
+        enableAll: true
+    - fieldName: title
+      operators:
+        enableAll: true
+    - fieldName: tomatoes
+      operators:
+        enableAll: true
+    - fieldName: type
+      operators:
+        enableAll: true
+    - fieldName: writers
+      operators:
+        enableAll: true
+    - fieldName: year
+      operators:
+        enableAll: true
+  graphql:
+    typeName: App_MoviesBoolExp
+
+---
+kind: Model
+version: v1
+definition:
+  name: Movies
+  objectType: Movies
+  source:
+    dataConnectorName: sample_mflix
+    collection: movies
+  filterExpressionType: MoviesBoolExp
+  orderableFields:
+    - fieldName: id
+      orderByDirections:
+        enableAll: true
+    - fieldName: awards
+      orderByDirections:
+        enableAll: true
+    - fieldName: cast
+      orderByDirections:
+        enableAll: true
+    - fieldName: countries
+      orderByDirections:
+        enableAll: true
+    - fieldName: directors
+      orderByDirections:
+        enableAll: true
+    - fieldName: fullplot
+      orderByDirections:
+        enableAll: true
+    - fieldName: genres
+      orderByDirections:
+        enableAll: true
+    - fieldName: imdb
+      orderByDirections:
+        enableAll: true
+    - fieldName: languages
+      orderByDirections:
+        enableAll: true
+    - fieldName: lastupdated
+      orderByDirections:
+        enableAll: true
+    - fieldName: metacritic
+      orderByDirections:
+        enableAll: true
+    - fieldName: numMflixComments
+      orderByDirections:
+        enableAll: true
+    - fieldName: plot
+      orderByDirections:
+        enableAll: true
+    - fieldName: poster
+      orderByDirections:
+        enableAll: true
+    - fieldName: rated
+      orderByDirections:
+        enableAll: true
+    - fieldName: released
+      orderByDirections:
+        enableAll: true
+    - fieldName: runtime
+      orderByDirections:
+        enableAll: true
+    - fieldName: title
+      orderByDirections:
+        enableAll: true
+    - fieldName: tomatoes
+      orderByDirections:
+        enableAll: true
+    - fieldName: type
+      orderByDirections:
+        enableAll: true
+    - fieldName: writers
+      orderByDirections:
+        enableAll: true
+    - fieldName: year
+      orderByDirections:
+        enableAll: true
+  graphql:
+    selectMany:
+      queryRootField: movies
+    selectUniques:
+      - queryRootField: moviesById
+        uniqueIdentifier:
+          - id
+    orderByExpressionType: App_MoviesOrderBy
+
+---
+kind: ModelPermissions
+version: v1
+definition:
+  modelName: Movies
+  permissions:
+    - role: admin
+      select:
+        filter: null
+
diff --git a/fixtures/ddn/subgraphs/sample_mflix/models/Sessions.hml b/fixtures/ddn/subgraphs/sample_mflix/models/Sessions.hml
new file mode 100644
index 00000000..3cc3436c
--- /dev/null
+++ b/fixtures/ddn/subgraphs/sample_mflix/models/Sessions.hml
@@ -0,0 +1,102 @@
+---
+kind: ObjectType
+version: v1
+definition:
+  name: Sessions
+  fields:
+    - name: id
+      type: ObjectId!
+    - name: jwt
+      type: String!
+    - name: userId
+      type: String!
+  graphql:
+    typeName: App_Sessions
+    inputTypeName: App_SessionsInput
+  dataConnectorTypeMapping:
+    - dataConnectorName: sample_mflix
+      dataConnectorObjectType: sessions
+      fieldMapping:
+        id:
+          column:
+            name: _id
+        jwt:
+          column:
+            name: jwt
+        userId:
+          column:
+            name: user_id
+
+---
+kind: TypePermissions
+version: v1
+definition:
+  typeName: Sessions
+  permissions:
+    - role: admin
+      output:
+        allowedFields:
+          - id
+          - jwt
+          - userId
+
+---
+kind: ObjectBooleanExpressionType
+version: v1
+definition:
+  name: SessionsBoolExp
+  objectType: Sessions
+  dataConnectorName: sample_mflix
+  dataConnectorObjectType: sessions
+  comparableFields:
+    - fieldName: id
+      operators:
+        enableAll: true
+    - fieldName: jwt
+      operators:
+        enableAll: true
+    - fieldName: userId
+      operators:
+        enableAll: true
+  graphql:
+    typeName: App_SessionsBoolExp
+
+---
+kind: Model
+version: v1
+definition:
+  name: Sessions
+  objectType: Sessions
+  source:
+    dataConnectorName: sample_mflix
+    collection: sessions
+  filterExpressionType: SessionsBoolExp
+  orderableFields:
+    - fieldName: id
+      orderByDirections:
+        enableAll: true
+    - fieldName: jwt
+      orderByDirections:
+        enableAll: true
+    - fieldName: userId
+      orderByDirections:
+        enableAll: true
+  graphql:
+    selectMany:
+      queryRootField: sessions
+    selectUniques:
+      - queryRootField: sessionsById
+        uniqueIdentifier:
+          - id
+    orderByExpressionType: App_SessionsOrderBy
+
+---
+kind: ModelPermissions
+version: v1
+definition:
+  modelName: Sessions
+  permissions:
+    - role: admin
+      select:
+        filter: null
+
diff --git a/fixtures/ddn/subgraphs/sample_mflix/models/Theaters.hml b/fixtures/ddn/subgraphs/sample_mflix/models/Theaters.hml
new file mode 100644
index 00000000..b294e615
--- /dev/null
+++ b/fixtures/ddn/subgraphs/sample_mflix/models/Theaters.hml
@@ -0,0 +1,198 @@
+---
+kind: ObjectType
+version: v1
+definition:
+  name: TheatersLocationAddress
+  fields:
+    - name: city
+      type: String!
+    - name: state
+      type: String!
+    - name: street1
+      type: String!
+    - name: street2
+      type: String
+    - name: zipcode
+      type: String!
+  graphql:
+    typeName: App_TheatersLocationAddress
+    inputTypeName: App_TheatersLocationAddressInput
+  dataConnectorTypeMapping:
+    - dataConnectorName: sample_mflix
+      dataConnectorObjectType: theaters_location_address
+
+---
+kind: TypePermissions
+version: v1
+definition:
+  typeName: TheatersLocationAddress
+  permissions:
+    - role: admin
+      output:
+        allowedFields:
+          - city
+          - state
+          - street1
+          - street2
+          - zipcode
+
+---
+kind: ObjectType
+version: v1
+definition:
+  name: TheatersLocationGeo
+  fields:
+    - name: coordinates
+      type: "[Float!]!"
+    - name: type
+      type: String!
+  graphql:
+    typeName: App_TheatersLocationGeo
+    inputTypeName: App_TheatersLocationGeoInput
+  dataConnectorTypeMapping:
+    - dataConnectorName: sample_mflix
+      dataConnectorObjectType: theaters_location_geo
+
+---
+kind: TypePermissions
+version: v1
+definition:
+  typeName: TheatersLocationGeo
+  permissions:
+    - role: admin
+      output:
+        allowedFields:
+          - coordinates
+          - type
+
+---
+kind: ObjectType
+version: v1
+definition:
+  name: TheatersLocation
+  fields:
+    - name: address
+      type: TheatersLocationAddress!
+    - name: geo
+      type: TheatersLocationGeo!
+  graphql:
+    typeName: App_TheatersLocation
+    inputTypeName: App_TheatersLocationInput
+  dataConnectorTypeMapping:
+    - dataConnectorName: sample_mflix
+      dataConnectorObjectType: theaters_location
+
+---
+kind: TypePermissions
+version: v1
+definition:
+  typeName: TheatersLocation
+  permissions:
+    - role: admin
+      output:
+        allowedFields:
+          - address
+          - geo
+
+---
+kind: ObjectType
+version: v1
+definition:
+  name: Theaters
+  fields:
+    - name: id
+      type: ObjectId!
+    - name: location
+      type: TheatersLocation!
+    - name: theaterId
+      type: Int!
+  graphql:
+    typeName: App_Theaters
+    inputTypeName: App_TheatersInput
+  dataConnectorTypeMapping:
+    - dataConnectorName: sample_mflix
+      dataConnectorObjectType: theaters
+      fieldMapping:
+        id:
+          column:
+            name: _id
+        location:
+          column:
+            name: location
+        theaterId:
+          column:
+            name: theaterId
+
+---
+kind: TypePermissions
+version: v1
+definition:
+  typeName: Theaters
+  permissions:
+    - role: admin
+      output:
+        allowedFields:
+          - id
+          - location
+          - theaterId
+
+---
+kind: ObjectBooleanExpressionType
+version: v1
+definition:
+  name: TheatersBoolExp
+  objectType: Theaters
+  dataConnectorName: sample_mflix
+  dataConnectorObjectType: theaters
+  comparableFields:
+    - fieldName: id
+      operators:
+        enableAll: true
+    - fieldName: location
+      operators:
+        enableAll: true
+    - fieldName: theaterId
+      operators:
+        enableAll: true
+  graphql:
+    typeName: App_TheatersBoolExp
+
+---
+kind: Model
+version: v1
+definition:
+  name: Theaters
+  objectType: Theaters
+  source:
+    dataConnectorName: sample_mflix
+    collection: theaters
+  filterExpressionType: TheatersBoolExp
+  orderableFields:
+    - fieldName: id
+      orderByDirections:
+        enableAll: true
+    - fieldName: location
+      orderByDirections:
+        enableAll: true
+    - fieldName: theaterId
+      orderByDirections:
+        enableAll: true
+  graphql:
+    selectMany:
+      queryRootField: theaters
+    selectUniques:
+      - queryRootField: theatersById
+        uniqueIdentifier:
+          - id
+    orderByExpressionType: App_TheatersOrderBy
+
+---
+kind: ModelPermissions
+version: v1
+definition:
+  modelName: Theaters
+  permissions:
+    - role: admin
+      select:
+        filter: null
+
diff --git a/fixtures/ddn/subgraphs/sample_mflix/models/Users.hml b/fixtures/ddn/subgraphs/sample_mflix/models/Users.hml
new file mode 100644
index 00000000..9d0f656b
--- /dev/null
+++ b/fixtures/ddn/subgraphs/sample_mflix/models/Users.hml
@@ -0,0 +1,114 @@
+---
+kind: ObjectType
+version: v1
+definition:
+  name: Users
+  fields:
+    - name: id
+      type: ObjectId!
+    - name: email
+      type: String!
+    - name: name
+      type: String!
+    - name: password
+      type: String!
+  graphql:
+    typeName: App_Users
+    inputTypeName: App_UsersInput
+  dataConnectorTypeMapping:
+    - dataConnectorName: sample_mflix
+      dataConnectorObjectType: users
+      fieldMapping:
+        id:
+          column:
+            name: _id
+        email:
+          column:
+            name: email
+        name:
+          column:
+            name: name
+        password:
+          column:
+            name: password
+
+---
+kind: TypePermissions
+version: v1
+definition:
+  typeName: Users
+  permissions:
+    - role: admin
+      output:
+        allowedFields:
+          - id
+          - email
+          - name
+          - password
+
+---
+kind: ObjectBooleanExpressionType
+version: v1
+definition:
+  name: UsersBoolExp
+  objectType: Users
+  dataConnectorName: sample_mflix
+  dataConnectorObjectType: users
+  comparableFields:
+    - fieldName: id
+      operators:
+        enableAll: true
+    - fieldName: email
+      operators:
+        enableAll: true
+    - fieldName: name
+      operators:
+        enableAll: true
+    - fieldName: password
+      operators:
+        enableAll: true
+  graphql:
+    typeName: App_UsersBoolExp
+
+---
+kind: Model
+version: v1
+definition:
+  name: Users
+  objectType: Users
+  source:
+    dataConnectorName: sample_mflix
+    collection: users
+  filterExpressionType: UsersBoolExp
+  orderableFields:
+    - fieldName: id
+      orderByDirections:
+        enableAll: true
+    - fieldName: email
+      orderByDirections:
+        enableAll: true
+    - fieldName: name
+      orderByDirections:
+        enableAll: true
+    - fieldName: password
+      orderByDirections:
+        enableAll: true
+  graphql:
+    selectMany:
+      queryRootField: users
+    selectUniques:
+      - queryRootField: usersById
+        uniqueIdentifier:
+          - id
+    orderByExpressionType: App_UsersOrderBy
+
+---
+kind: ModelPermissions
+version: v1
+definition:
+  modelName: Users
+  permissions:
+    - role: admin
+      select:
+        filter: null
+