将日期与SQLAlchemy一对多关系进行比较

Question

How do you compare dates for one-to-many SQLAlchemy relationships?

Basically for my model structure, there is a one to many relationship between Team and Player:

class Team(db.Model):
    __tablename__ = 'Team'
    id = db.Column(db.Integer, primary_key=True)
    players = db.relationship('Player', backref='team', lazy='dynamic')

class Player(db.Model):
    __tablename__ = 'Player'
    id = db.Column(db.Integer, primary_key=True)
    last_match = db.Column(db.DateTime)
    team_id = db.Column(db.Integer, db.ForeignKey('Team.id'))

So I want to find all the recent players of a team past a certain date , but what I tried did not work:

team = Team.query.filter_by(id=some_id).first()
recent_players = team.players.filter(Players.last_match.date() > some_date)

What am I doing wrong?

Answer 1

Just recent_players = team.players.filter(Players.last_match > some_date) should do it.
If you really need to have only date part of datetime , you can cast it using sqlalchemy.sql.expression.cast :

recent_players = team.players.filter(cast(Players.last_match, DATE) > some_date)