Add support of dataclasses

[dan83g]

After updating pydantic, it was no longer possible to use the __pydantic_model__ attribute (pydantic.dataclasses.dataclass). Is it possible to create schemas dynamically from dataclasses.

[vitalik]

@dan83g

could you provide some use case ?

why dont you just use pydantic's dataclasses ?

from pydantic.dataclasses import dataclass

@dataclass
class User:
    id: int
    name: str

[dan83g]

I would like something like this (SearchRequest)

@pydantic.dataclasses.dataclass(config=pydantic.ConfigDict(arbitrary_types_allowed=True))
class SearchRequest:
    q: str
    ...
    
    @field_validator('q')
    def validate_q(cls, v):
        return v

@router.api_operation(['GET'], '/search', response=SearchResponseSchema)
def search(request, query_params: Query[SearchRequest]):
    ... 

[vitalik]

Note to myself - pydantic.dataclasses should work - probably not detecting it correctly