Hi,
I'd like to setup bidirectionnal data synchornization between the
lastname attribute of two related models
class User(Base):
__tablename__ = 'users'
id = Column(Integer, primary_key=True)
lastname = Column(String(50))
userdatas = relationship('UserDatas',
primaryjoin='User.id==UserDatas.user_id', back_populates='user',
uselist=False)
class UserDatas(Base):
__tablename__ = 'userdatas'
id = Column(Integer, primary_key=True)
lastname = Column(String(50))
user_id = Column(ForeignKey('users.id'))
user = relationship('User', primaryjoin='User.id==UserDatas.user_id')
I thought I could do something like this :
def sync_lastname_user_to_userdatas(target, value, oldvalue, initiator):
target.userdatas.lastname = value
listen(User.lastname, 'set', sync_lastname_user_to_userdatas)
def sync_lastname_userdatas_to_user(target, value, oldvalue, initiator):
target.user.lastname = value
listen(UserDatas.lastname, 'set', sync_lastname_userdatas_to_user)
The obvious problem here is the infinite loop that is generated
So :
Is there a way to set an attribute without firing the 'set' event ?
I tend to think there is a better way to do that, does anybody have an
advice to share ?
Thanks in advance
Regards,
Gaston Tjebbes
https://www.majerti.fr
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