Self-Referential Association Relationship SQLalchemy

Question

In my flask application with flask-sqlalchemy i need to create association between two contact here is my Contact model

class Contact(db.Model):         


        

Answer 1

Your relationship is not correctly designed. A secondary should be an ordinary table, not a mapped class. If you want the extra data (relation_type) on your ContactRelation, you should use the Association Table pattern described in the SQLAlchemy Relationship docs: http://docs.sqlalchemy.org/en/rel_1_1/orm/basic_relationships.html#association-object