I managed to figure this one out my self :)
association_table = db.Table('association',
db.Column('user_id', db.Integer, db.ForeignKey('user.id')),
db.Column('friend_id', db.Integer, db.ForeignKey('user.id'))
)
class User(db.Model):
id = db.Column(db.Integer, primary_key=True)
username = db.Column(db.String(20), unique=True)
password = db.Column(db.String(30))
email = db.Column(db.String(45), unique=True)
friends = db.relationship("User",
secondary=association_table,
backref='added_by',
primaryjoin=id == association_table.c.user_id,
secondaryjoin=id == association_table.c.friend_id)
With this I can now do following:
>>> user1 = User.query.filter_by(id=1).first()
>>> user1.friends
[]
>>> user2 = User.query.filter_by(id=2).first()
>>> user1.friends.append(user2)
>>> user1.friends
[<User('user1','[email protected]','2')>]
>>> user1.friends[0].added_by
[<User('admin','[email protected]','1')>]
On Monday, 5 March 2012 15:54:27 UTC, Stefan wrote:
> I have been struggeling for a few days with this now and trying to see
> if I maybe can get some help here. I'm using SQLAlchemy with Flask
>
> This is what I have tried so far:
>
> I got a user class defined like this:
>
> association_table = db.Table('association',
> db.Column('user_id', db.Integer, db.ForeignKey('user.id')),
> db.Column('friend_id', db.Integer, db.ForeignKey('friend.id'))
> )
>
> class Friend(db.Model):
> id = db.Column(db.Integer, primary_key=True)
>
> class User(db.Model):
> id = db.Column(db.Integer, primary_key=True)
> username = db.Column(db.String(20), unique=True)
> password = db.Column(db.String(30))
> friends = db.relationship("Friend",
> secondary=association_table)
>
>
>
> Basically I want to have a relationship to other objects of class User
> in the field User.friends
>
> What am I doing wrong here?
>
> Thanks,
> Stefan
On Monday, 5 March 2012 15:54:27 UTC, Stefan wrote:
>
> I have been struggeling for a few days with this now and trying to see
> if I maybe can get some help here. I'm using SQLAlchemy with Flask
>
> This is what I have tried so far:
>
> I got a user class defined like this:
>
> association_table = db.Table('association',
> db.Column('user_id', db.Integer, db.ForeignKey('user.id')),
> db.Column('friend_id', db.Integer, db.ForeignKey('friend.id'))
> )
>
> class Friend(db.Model):
> id = db.Column(db.Integer, primary_key=True)
>
> class User(db.Model):
> id = db.Column(db.Integer, primary_key=True)
> username = db.Column(db.String(20), unique=True)
> password = db.Column(db.String(30))
> friends = db.relationship("Friend",
> secondary=association_table)
>
>
>
> Basically I want to have a relationship to other objects of class User
> in the field User.friends
>
> What am I doing wrong here?
>
> Thanks,
> Stefan
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