def test_schema_editor_replace_view(): """Tests whether creating a view and then replacing it with another one (thus changing the backing query) works as expected.""" underlying_model = get_fake_model({"name": models.TextField()}) model = define_fake_view_model( {"name": models.TextField()}, {"query": underlying_model.objects.filter(name="test1")}, ) underlying_model.objects.create(name="test1") underlying_model.objects.create(name="test2") schema_editor = PostgresSchemaEditor(connection) schema_editor.create_view_model(model) objs = list(model.objects.all()) assert len(objs) == 1 assert objs[0].name == "test1" model._view_meta.query = underlying_model.objects.filter( name="test2" ).query.sql_with_params() schema_editor.replace_view_model(model) objs = list(model.objects.all()) assert len(objs) == 1 assert objs[0].name == "test2"
def test_schema_editor_create_delete_view(): """Tests whether creating and then deleting a view using the schema editor works as expected.""" underlying_model = get_fake_model({"name": models.TextField()}) model = define_fake_view_model( {"name": models.TextField()}, {"query": underlying_model.objects.filter(name="test1")}, ) underlying_model.objects.create(name="test1") underlying_model.objects.create(name="test2") schema_editor = PostgresSchemaEditor(connection) schema_editor.create_view_model(model) # view should only show records name="test"1 objs = list(model.objects.all()) assert len(objs) == 1 assert objs[0].name == "test1" # create another record, view should have it right away underlying_model.objects.create(name="test1") assert model.objects.count() == 2 # delete the view schema_editor.delete_view_model(model) # make sure it was actually deleted assert model._meta.db_table not in db_introspection.table_names(True)