I’m trying to serialize to json or dict list of models of SQLAlchemy to then assert it with response.json():

from datetime import date
from typing import Annotated, Generic, TypeVar

from pydantic import BaseModel, Field

ResultItemSchema = TypeVar("ResultItemSchema", bound=BaseModel)


class TtzSchema(BaseModel):
    id: int
    name: str
    start_date: date


class PaginatedResponseSchema(BaseModel, Generic[ResultItemSchema]):
    count: int
    results: list[ResultItemSchema]


class Ttz(Base):
    __tablename__ = "ttz"

    id: int
    name: str
    start_date: date


cnt = 3
results = [Ttz(...) for i in range(cnt)]

PaginatedResponseSchema[TtzSchema].model_validate({"count": cnt, "results": results})  # does not work. how to serialize to json?

But this does not work.