flask sqlalchemy關系中的多個外鍵

Question

嗨，我是用瓶和SQLAlchemy的，我試圖讓球隊的比賽關系到讓所有的比賽是否是TEAM1或TEAM2（所以我想要的是能夠通過獲得所有比賽的球隊給出匹配屬性，無論它是否TEAM1或TEAM2在Match表），我得到的錯誤：

sqlalchemy.exc.AmbiguousForeignKeysError：無法確定關系Team.matches的父/子表之間的聯接條件

有多個鏈接表的外鍵路徑。 指定foreign_keys參數，提供這些列的列表，這些列應被視為包含對父表的外鍵引用。

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

我在#sqlalchemy irc上得到了家伙的幫助，所以我使用了錯誤的方法，現在我改為與primaryjoin建立關系：

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