Hi Everyone,
We are trying to switch to expire_on_commit=False in our project and our tests
started to fail on the following scenario.
Our best guess is that the attribute is lazy loaded on first access and it is
not refresh/expired when the relationships change.
Any good suggestions ?
## Modelclass Parent(Base):
id = sqlalchemy.Column(sqlalchemy.Integer(), primary_key=True,
autoincrement=True)
childs = sqlalchemy.orm.relationship("Child",
primaryjoin="or_(Child.father_id==Parent.id, Child.mother_id==Parent.id)")
class Child(Base):
id = Column(sqlalchemy.Integer(), primary_key=True, autoincrement=True)
father_id = sqlalchemy.Column(sqlalchemy.Integer(),
sqlalchemy.ForeignKey('parents.id'))
mother_id = sqlalchemy.Column(sqlalchemy.Integer(),
sqlalchemy.ForeignKey('parents.id'))
father = sqlalchemy.orm.relationship("Parent", foreign_keys=[father_id])
mother = sqlalchemy.orm.relationship("Parent", foreign_keys=[mother_id])
## Test Code
father = Parent()assert len(father.childs) == 0 # SUCCESS
mother = Parent()
c1 = Child(father=father, mother=mother)assert c1.father is father
# SUCCESS
session.add_all([father, mother, c1])
session.commit()
# Using refresh solves the assertion#session.refresh(father)
assert len(father.childs) > 0 # FAILassert father.childs == [c1] # FAIL
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