Following the ORM tutorial of `User` and `Address`,
if I configure a `user` attribute on `Address`:
class Address(Base):
__tablename__ = 'addresses'
id = Column(Integer, primary_key=True)
email_address = Column(String, nullable=False)
user_id = Column(Integer, ForeignKey('users.id'))
user = relationship('User', backref='addresses')
`User.addresses` is not available until I initiate a `User` or `Address`
object.
According to the documentation of backref
<http://docs.sqlalchemy.org/en/rel_1_0/orm/relationship_api.html#sqlalchemy.orm.relationship.params.backref>
:
indicates the string name of a property to be placed on the related
mapper’s class that will handle this relationship in the other direction. *The
other property will be created automatically when the mappers are
configured.*
What does it mean?
I'm using version 1.0.12 on Python 3.5.1
Thanks
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