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from typing import cast
from sqlalchemy import Column
from sqlalchemy import Integer
from sqlalchemy.orm import declarative_base
from sqlalchemy.orm import Mapped
from sqlalchemy.orm import query_expression
from sqlalchemy.orm import Session
from sqlalchemy.orm import with_expression
Base = declarative_base()
class User(Base):
__tablename__ = "users"
id = Column(Integer, primary_key=True)
foo = Column(Integer)
question_count: Mapped[int] = query_expression()
answer_count: int = query_expression()
s = Session()
q = s.query(User).options(with_expression(User.question_count, User.foo + 5))
u1: User = cast(User, q.first())
qc: int = u1.question_count
print(qc)
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