[BUG] `ModelSchema` produces `id > (integer | null)` openapi

[viktorvsk]

Describe the bug

Having this model definition:

class MyModel(ModelSchema):
    class Meta:
        model = MyModel
        fields = ["id"]

Produces next definition on Swagger: id > (integer | null).

However this definition:

class MyModel(ModelSchema):
    id: int
    class Meta:
        model = MyModel

Produces id* integer as expected. SQL is default — id bigint NOT NULL

Versions (please complete the following information):

• Python version: 3.12.2
• Django version: 5.0.2
• Django-Ninja version: 1.1.0
• Pydantic version: 2.6.4

Probably a duplicate of https://github.com/vitalik/django-ninja/issues/907

[pmdevita]

What does your MyModel orm model look like?