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feat(errors): ErrorModel implement errors.Unwrap #777

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feat(errors): ErrorModel implement errors.Unwrap #777

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9 changes: 9 additions & 0 deletions error.go
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Original file line number Diff line number Diff line change
Expand Up @@ -89,8 +89,13 @@ type ErrorModel struct {
// Errors provides an optional mechanism of passing additional error details
// as a list.
Errors []*ErrorDetail `json:"errors,omitempty" doc:"Optional list of individual error details"`

errors []error
}

// Unwrap satisfies the `error113` interface. It returns an array of wrapped errors.
func (e ErrorModel) Unwrap() []error { return e.errors }

// Error satisfies the `error` interface. It returns the error's detail field.
func (e *ErrorModel) Error() string {
return e.Detail
Expand All @@ -107,8 +112,11 @@ func (e *ErrorModel) Error() string {
// Value: 5
// })
func (e *ErrorModel) Add(err error) {
e.errors = append(e.errors, err)
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@danielgtaylor danielgtaylor Mar 29, 2025

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This is great, but huma.NewError doesn't actually call Add on the error when constructing the details, and the same is potentially the case when manually returning error models in other code (and handlers in your service). I wonder if there is a better way to support most uses instead of requiring Add to get called 🤔

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@burgesQ burgesQ Mar 29, 2025

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Maybe smth like errors.Joins on already existing .Errors field ?

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@burgesQ burgesQ Apr 2, 2025 •
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Maybe a simple edit to the NewError method would already help a bit nvm it's already published with such change

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@burgesQ burgesQ Apr 2, 2025

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Hehe I think we're good !
My changes were for some code that did some stuff like return nil, huma.Error500...("error", ErrorSpecialType{err}). Turn out my "middleware" tests pass if I change it to smth like return nil, ErrorSpecialType{huma.Error500...("error", err)


if converted, ok := err.(ErrorDetailer); ok {
e.Errors = append(e.Errors, converted.ErrorDetail())

return
}

Expand Down Expand Up @@ -245,6 +253,7 @@ var NewError = func(status int, msg string, errs ...error) StatusError {
Title: http.StatusText(status),
Detail: msg,
Errors: details,
errors: errs,
}
}

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