#!/usr/bin/env python3
from typing import Optional
from pydantic import BaseModel, Field

import pretty_errors

pretty_errors.configure(
    separator_character = '*',
    display_link        = True,
    exception_above     = True,
    exception_below     = False,
    line_color          = pretty_errors.RED + '> ' + pretty_errors.default_config.line_color,
    code_color          = '  ' + pretty_errors.default_config.line_color,
    display_locals      = True,
)


class MyEvent(BaseModel):
    function_name: str = Field('my_function', frozen=True)
    limit: int = 10


myEvent = MyEvent()
myEvent2 = MyEvent(function_name="hello world")
print(myEvent.model_dump())
print(myEvent2.model_dump())
myEvent.function_name = "altered_function"
print(myEvent.model_dump())

{'function_name': 'my_function', 'limit': 10}
{'function_name': 'hello world', 'limit': 10}

*****************************************************************************************************************************
pydantic_core._pydantic_core.ValidationError:
MyEvent
[<builtins.PyLineError object at 0x7f21af7489c0>]
python
False

test-pydantic.py 27 <module>
"/home/gustavo/tmp/sandbox-python/./test-pydantic.py", line 27
> myEvent.function_name = "altered_function"

main.py 910 __setattr__
"/home/gustavo/tmp/sandbox-python/venv/lib/python3.11/site-packages/pydantic/main.py", line 910
> self._check_frozen(name, value)

main.py 985 _check_frozen
"/home/gustavo/tmp/sandbox-python/venv/lib/python3.11/site-packages/pydantic/main.py", line 985
> raise pydantic_core.ValidationError.from_exception_data(self.__class__.__name__, [error])

self: function_name='my_function' limit=10
name: function_name
error: {'type': 'frozen_field', 'loc': ('function_name',), 'input': 'altered_function'}

{'function_name': 'my_function', 'limit': 10}
{'function_name': 'hello world', 'limit': 10}
Traceback (most recent call last):
  File "/home/gustavo/tmp/sandbox-python/./test-pydantic.py", line 17, in <module>
    myEvent.function_name = "altered_function"
    ^^^^^^^^^^^^^^^^^^^^^
  File "/home/gustavo/tmp/sandbox-python/venv/lib/python3.11/site-packages/pydantic/main.py", line 910, in __setattr__
    self._check_frozen(name, value)
  File "/home/gustavo/tmp/sandbox-python/venv/lib/python3.11/site-packages/pydantic/main.py", line 985, in _check_frozen
    raise pydantic_core.ValidationError.from_exception_data(self.__class__.__name__, [error])
pydantic_core._pydantic_core.ValidationError: 1 validation error for MyEvent
function_name
  Field is frozen [type=frozen_field, input_value='altered_function', input_type=str]
    For further information visit https://errors.pydantic.dev/2.10/v/frozen_field

pydantic_core._pydantic_core.ValidationError:
MyEvent
[<builtins.PyLineError object at 0x7f21af7489c0>]
python
False

pydantic_core._pydantic_core.ValidationError: 1 validation error for MyEvent
function_name
  Field is frozen [type=frozen_field, input_value='altered_function', input_type=str]
    For further information visit https://errors.pydantic.dev/2.10/v/frozen_field