烧瓶sqlalchemy多个外键关系

Question

嗨,我是用瓶和SQLAlchemy的,我试图让球队的比赛关系到让所有的比赛是否是TEAM1或TEAM2(所以我想要的是能够通过获得所有比赛的球队给出匹配属性,无论它是否TEAM1或TEAM2在Match表),我得到的错误:

sqlalchemy.exc.AmbiguousForeignKeysError:无法确定关系Team.matches上父/子表之间的连接条件

链接表的链接路径有多个.指定foreign_keys参数,提供应列为包含对父表的外键引用的列的列表.

class Match(db.Model):
  id = db.Column(db.Integer, primary_key=True)
  map = db.Column(db.String(80), index=True)
  date = db.Column(db.DateTime, index=True)
  agreed = db.Column(db.Boolean)
  done = db.Column(db.Boolean)
  ladder_id = db.Column(db.Integer, db.ForeignKey('ladder.id'))
  team1_id = db.Column(db.Integer, db.ForeignKey('team.id'))
  team2_id = db.Column(db.Integer, db.ForeignKey('team.id'))
  team1_rounds = db.Column(db.Integer)
  team2_rounds = db.Column(db.Integer)
  team1_accepted_score = db.Column(db.Boolean)
  team2_accepted_score = db.Column(db.Boolean)
  points = db.Column(db.Integer)

  team1 = db.relationship('Team', foreign_keys='Match.team1_id')
  team2 = db.relationship('Team', foreign_keys='Match.team2_id')

class Team(db.Model):
  id = db.Column(db.Integer, primary_key=True)
  name = db.Column(db.String(80), index=True)
  tag = db.Column(db.String(20), index=True, unique=True)
  captain_id = db.Column(db.Integer, db.ForeignKey('user.id'))
  captain = db.relationship('User', uselist=False,
               foreign_keys='Team.captain_id')
  members = db.relationship('User', backref='team',
                foreign_keys='User.team_id', lazy='dynamic')
  matches = db.relationship('Match',
                 foreign_keys='[Match.team1_id, Match.team2_id]', lazy='dynamic')

Answer 1

我从#sqlalchemy irc上的人那里得到了帮助,所以我采用了错误的方法我现在建立了与主连接的关系:

matches = db.relationship('Match', primaryjoin="or_(Team.id==Match.team1_id, Team.id==Match.team2_id)", lazy='dynamic')