I have a route to which I need to send a request in MyRequest scheme, as well as a list of files:

@router.post("/myEndpoint", response_model=MyResponse)
async def my_endpoint(my_request: MyRequest,
                      db: AsyncSession = Depends(get_async_session)):
    ...

class MyRequest(BaseModel):
    userId: str
    language: str
    files: list[UploadFile] = File(...)

But when I make a request, I get a ValidationError:

{
  "detail": [
    {
      "loc": [
        "body"
      ],
      "msg": "value is not a valid dict",
      "type": "type_error.dict"
    }
  ]
}

I tried to remove files from the schema, passing them as an argument along with it:

@router.post("/myEndpoint", response_model=MyResponse)
async def my_endpoint(my_request: MyRequest,
                      files: list[UploadFile] = File(...),
                      db: AsyncSession = Depends(get_async_session)):
    ...

class MyRequest(BaseModel):
    userId: str
    language: str

But there was no effect:

{
  "detail": [
    {
      "loc": [
        "body",
        "my_request"
      ],
      "msg": "value is not a valid dict",
      "type": "type_error.dict"
    }
  ]
}