[BUG] pydantic.errors.PydanticSchemaGenerationError: Unable to generate pydantic-core schema for <class 'starlette.requests.Request'>.

[aurotripathy]

Description

I'm getting these errors.
Unable to determine why (since I'm in a isolated conda env)

pydantic.errors.PydanticSchemaGenerationError: Unable to generate pydantic-core schema for <class 'starlette.requests.Request'>. Set `arbitrary_types_allowed=True` in the model_config to ignore this error or implement `__get_pydantic_core_schema__` on your type to fully support it.

If you got this error by calling handler(<some type>) within `__get_pydantic_core_schema__` then you likely need to call `handler.generate_schema(<some type>)` since we do not call `__get_pydantic_core_schema__` on `<some type>` otherwise to avoid infinite recursion.

For further information visit https://errors.pydantic.dev/2.9/u/schema-for-unknown-type
ERROR:    Exception in ASGI application
Traceback (most recent call last):
  File "/home/furiosa/.local/lib/python3.10/site-packages/pydantic/type_adapter.py", line 279, in _init_core_attrs
    self._core_schema = _getattr_no_parents(self._type, '__pydantic_core_schema__')
  File "/home/furiosa/.local/lib/python3.10/site-packages/pydantic/type_adapter.py", line 121, in _getattr_no_parents
    raise AttributeError(attribute)
AttributeError: __pydantic_core_schema__

Workaround I found here was to downgrade fastapi from 0.114.0 to 0.111.0

Downgrading fastapi can solve the problem e.g.:

pip install fastapi==0.111.0

Reproduction steps

Just invoked the app locally:
`python app.py`

Screenshots

![DESCRIPTION](LINK.png)

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Additional information

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