如何为DateTime比较定义Flask-SQLAlchemy(MySQL)混合属性或聚合属性

from datetime import datetime
from flask_sqlalchemy import SQLAlchemy
from sqlalchemy import func
from sqlalchemy.ext.hybrid import hybrid_property

db = SQLAlchemy()

class MyModel(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)

    @hybrid_property
    def is_recent(self):
        # 判断是否在最近24小时内创建
        return self.created_at >= datetime.utcnow() - timedelta(hours=24)

    @is_recent.expression
    def is_recent(cls):
        # 在SQL表达式中使用函数来比较DateTime字段
        return cls.created_at >= func.now() - func.timedelta(hours=24)

recent_records = MyModel.query.filter(MyModel.is_recent == True).all()