Method test_circular_sort

test/orm/test_cascade.py:4139–4184

test ticket 1306

(self)

        "The `objects` parameter of `Session.flush` is deprecated"
    )
    def test_circular_sort(self):
        """test ticket 1306"""

        base, inh_child, parent = (
            self.tables.base,
            self.tables.inh_child,
            self.tables.parent,
        )

        class Base(ComparableEntity):
            pass

        class Parent(Base):
            pass

        class Child(Base):
            pass

        self.mapper_registry.map_imperatively(Base, base)

        self.mapper_registry.map_imperatively(
            Child,
            inh_child,
            inherits=Base,
            properties={
                "parent": relationship(
                    Parent,
                    backref="children",
                    primaryjoin=inh_child.c.parent_id == parent.c.id,
                )
            },
        )

        self.mapper_registry.map_imperatively(Parent, parent, inherits=Base)

        sess = fixture_session()
        p1 = Parent()

        c1, c2, c3 = Child(), Child(), Child()
        p1.children = [c1, c2, c3]
        sess.add(p1)

        sess.flush([c1])
        assert p1 in sess.new
        assert c1 not in sess.new
        assert c2 in sess.new


class SubclassCascadeTest(fixtures.DeclarativeMappedTest):