bug: don't support pydantic v2

[bekishev04]

Describe the bug

When i use pydantic v2:

assert issubclass(model, BaseModel), "invalid `pydantic.BaseModel`"
AssertionError: invalid `pydantic.BaseModel`

code line:
https://github.com/0b01001001/spectree/blob/master/spectree/response.py#L76

To Reproduce

class ResponseMessage(BaseModel):
    """Response Message"""

    message: str


@spec_tree.validate(
        resp=Response("HTTP_401", HTTP_200=schemas.ResponseMessage),
    )
    def get(self):
        pass

Expected behavior

No response

The spectree version

spectree = "^1.2.0"
pydantic = {extras = ["email"], version = "^2.1.1"}

Additional context

You can fix it in this file:

https://github.com/0b01001001/spectree/blob/master/spectree/_pydantic.py

There we use only version 1 of pydantic and dont use the second version

[kemingy]

Currently, you might need to from pydantic.v1 import BaseModel when you're using pydantic v2.

It's tricky to support both v1 and v2.

[kemingy]

Ref to #319 (review)

We might need to refactor some parts.

[bekishev04]

Currently, you might need to from pydantic.v1 import BaseModel when you're using pydantic v2.

It's tricky to support both v1 and v2.

i understand. But when know i want using V2 pydantic. And cant do it with spectree.

I think it would be useful to write in readme that spectree only supports version 1 including the first version from pedantic v2

[bekishev04]

You can close the issue if you think it is necessary, I have received my answer. I was just counting on full v2 support

[kemingy]

Let me create another issue to track the full v2 support.