help,pydantic_model_creator con't display to reponse_model output foreignkey_value.

models.py:

class PostCategory(Model):
    """category model"""
    id = fields.IntField(pk=True)
    name = fields.CharField(max_length=50)
    published = fields.BooleanField(default=True)
    description = fields.TextField(max_length=300, null=True)

    parent: fields.ForeignKeyNullableRelation['PostCategory'] = fields.ForeignKeyField('models.PostCategory',
                                                                                       on_delete=fields.CASCADE,
                                                                                       null=True,
                                                                                       related_name='children')
    children = fields.ReverseRelation["PostCategory"]
    posts: fields.ReverseRelation["Post"]

    class Meta:
        table = "post_category"

    def __str__(self) -> str:
        return self.name

    class PydanticMeta:
        backward_relations = False
        exclude = ('posts', 'parent')
        allow_cycles = True
        max_recursion = 3

schemas.py

class CreateCategory(PydanticModel):
    name: str
    parent_id: int = None
    discription: str = None


GetCategory = pydantic_model_creator(models.PostCategory, name='GetCategory')


class OutCategory(GetCategory):
    id: int
    name: str

router.py

@category_router.post('/', response_model=schemas.OutCategory)
async def create_category(schema: schemas.CreateCategory, user: models.User = Depends(get_superuser)):
    return await service.category_s.create(schema)


@category_router.get('/', response_model=List[schemas.OutCategory])
async def get_all_category():
    return await service.category_s.filter(parent_id__isnull=True)

swagger output:

i can't to get parent category and children categories to show,how can i fix?

Start with models.py, schemas.py, and router.py, focusing on pydantic_model_creator and the response_model declarations. Reproduce the category endpoints with the shown parent and children relations, then inspect the generated response schema and returned queryset. Done means the intended parent and children category fields appear in the API output.