table name, not class name, please see
http://docs.sqlalchemy.org/en/rel_0_9/orm/extensions/declarative.html#declarative-many-to-many
On Sep 23, 2014, at 8:33 AM, Mohammad Reza Kamalifard <mr.kamalif...@gmail.com>
wrote:
> In my application with SQLAlchemy i need to create many to many relationship
> between two contact object also sotre data for each of relatioship here is my
> Contact model
>
> class Contact(db.Model):
> __tablename__ = 'contact'
> id = db.Column(db.Integer, primary_key=True)
> name = db.Column(db.Unicode(120), nullable=False, unique=False)
> user_id = db.Column(db.Integer, db.ForeignKey('user.id'))
>
> to_contacts = db.relationship('Contact',
> secondary='ContactRelation',
> primaryjoin='id==
> ContactRelation.from_contact_id',
> secondaryjoin='id==
> ContactRelation.to_contact_id',
> backref='from_contacts')
>
> and my association class ContactRelation:
>
> class ContactRelation(db.Model):
> __tablename__ = 'contactrelation'
> id = db.Column(db.Integer, primary_key=True)
> from_contact_id = db.Column(db.Integer, db.ForeignKey('contact.id'))
> to_contact_id = db.Column(db.Integer, db.ForeignKey('contact.id'))
> relation_type = db.Column(db.String(100), nullable=True)
> every thing seems good but i have error :
> AttributeError: type object 'ContactRelation' has no attribute 'c'
>
>
>
>
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