Method test_dict

test/orm/test_collection.py:2417–2458

test that a 'dict' can be used as a collection and can lazyload.

(self)

        f.bars.clear()

    def test_dict(self):
        """test that a 'dict' can be used as a collection and can lazyload."""

        someothertable, sometable = (
            self.tables.someothertable,
            self.tables.sometable,
        )

        class Foo:
            pass

        class Bar:
            pass

        class AppenderDict(dict):
            @collection.appender
            def set(self, item):
                self[id(item)] = item

            @collection.remover
            def remove(self, item):
                if id(item) in self:
                    del self[id(item)]

        self.mapper_registry.map_imperatively(
            Foo,
            sometable,
            properties={
                "bars": relationship(Bar, collection_class=AppenderDict)
            },
        )
        self.mapper_registry.map_imperatively(Bar, someothertable)
        f = Foo()
        f.bars.set(Bar())
        f.bars.set(Bar())
        sess = fixture_session()
        sess.add(f)
        sess.flush()
        sess.expunge_all()
        f = sess.get(Foo, f.col1)
        assert len(list(f.bars)) == 2
        f.bars.clear()

    def test_dict_wrapper(self):
        """test that the supplied 'dict' wrapper can be used as a