I think it's unreasonable to expect strawberry's mypy plugin to get this right, but a better error message would be helpful.

We use a library pydantic_sqlalchemy to dynamically create pydantic models based off our DB ORM models. I wanted to then take some of those and use them as strawberry input.

class MyAwesomePydanticModel(pydantic_sqlalchemy.sqlalchemy_to_pydantic(OrmModel)):
  pass

@strawberry.experimental.pydantic.input(  # Fails with 'Pydantic plugin not installed, please add pydantic.mypy your mypy.ini plugins'
    model=MyAwesomePydanticModel, all_fields=True
)
class MyAwesomePydanticModelInput:
    pass

Describe the Bug

I do have the pydantic plugin installed, but because of the magic in the middle, I'm assuming there's information lost. Leads to a befuddling error message.

The same error seems to appear if you try to use @strawberry.experimental.pydantic.input(model=NotPydanticModel)

So maybe something like
`No pydantic mypy information found for model XYZ. Please check that you have included pydantic.mypy in your mypy.ini plugins and that XYZ inherits from pydantic.BaseModel'
if there's no way to get a more granular cause of the error.

System Information

• Strawberry version (if applicable): 0.175.1

Additional Context

Low priority, but now at least there's something on google search if anyone else hits the same thing :)