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Python operations.RemoveField类代码示例

本文整理汇总了Python中django.db.migrations.operations.RemoveField的典型用法代码示例。如果您正苦于以下问题:Python RemoveField类的具体用法?Python RemoveField怎么用?Python RemoveField使用的例子?那么, 这里精选的类代码示例或许可以为您提供帮助。


在下文中一共展示了RemoveField类的2个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Python代码示例。

示例1: test_manager_refer_correct_model_version

    def test_manager_refer_correct_model_version(self):
        """
        #24147 - Tests that managers refer to the correct version of a
        historical model
        """
        project_state = ProjectState()
        project_state.add_model(
            ModelState(
                app_label="migrations",
                name="Tag",
                fields=[("id", models.AutoField(primary_key=True)), ("hidden", models.BooleanField())],
                managers=[("food_mgr", FoodManager("a", "b")), ("food_qs", FoodQuerySet.as_manager())],
            )
        )

        old_model = project_state.apps.get_model("migrations", "tag")

        new_state = project_state.clone()
        operation = RemoveField("tag", "hidden")
        operation.state_forwards("migrations", new_state)

        new_model = new_state.apps.get_model("migrations", "tag")

        self.assertIsNot(old_model, new_model)
        self.assertIs(old_model, old_model.food_mgr.model)
        self.assertIs(old_model, old_model.food_qs.model)
        self.assertIs(new_model, new_model.food_mgr.model)
        self.assertIs(new_model, new_model.food_qs.model)
        self.assertIsNot(old_model.food_mgr, new_model.food_mgr)
        self.assertIsNot(old_model.food_qs, new_model.food_qs)
        self.assertIsNot(old_model.food_mgr.model, new_model.food_mgr.model)
        self.assertIsNot(old_model.food_qs.model, new_model.food_qs.model)
开发者ID:calebsmith,项目名称:django,代码行数:32,代码来源:test_state.py

示例2: test_remove_relations

    def test_remove_relations(self):
        """
        #24225 - Tests that relations between models are updated while
        remaining the relations and references for models of an old state.
        """
        new_apps = Apps()

        class A(models.Model):
            class Meta:
                app_label = "something"
                apps = new_apps

        class B(models.Model):
            to_a = models.ForeignKey(A, models.CASCADE)

            class Meta:
                app_label = "something"
                apps = new_apps

        def get_model_a(state):
            return [mod for mod in state.apps.get_models() if mod._meta.model_name == 'a'][0]

        project_state = ProjectState()
        project_state.add_model(ModelState.from_model(A))
        project_state.add_model(ModelState.from_model(B))
        self.assertEqual(len(get_model_a(project_state)._meta.related_objects), 1)
        old_state = project_state.clone()

        operation = RemoveField("b", "to_a")
        operation.state_forwards("something", project_state)
        # Tests that model from old_state still has the relation
        model_a_old = get_model_a(old_state)
        model_a_new = get_model_a(project_state)
        self.assertIsNot(model_a_old, model_a_new)
        self.assertEqual(len(model_a_old._meta.related_objects), 1)
        self.assertEqual(len(model_a_new._meta.related_objects), 0)

        # Same test for deleted model
        project_state = ProjectState()
        project_state.add_model(ModelState.from_model(A))
        project_state.add_model(ModelState.from_model(B))
        old_state = project_state.clone()

        operation = DeleteModel("b")
        operation.state_forwards("something", project_state)
        model_a_old = get_model_a(old_state)
        model_a_new = get_model_a(project_state)
        self.assertIsNot(model_a_old, model_a_new)
        self.assertEqual(len(model_a_old._meta.related_objects), 1)
        self.assertEqual(len(model_a_new._meta.related_objects), 0)
开发者ID:Niansheng,项目名称:django,代码行数:50,代码来源:test_state.py


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