Python django.core.serializers.sort_dependencies() Examples

def test_dependency_sorting_tight_circular(self):
        with self.assertRaisesMessage(
            RuntimeError,
            "Can't resolve dependencies for fixtures_regress.Circle1, "
            "fixtures_regress.Circle2 in serialized app list."
        ):
            serializers.sort_dependencies([('fixtures_regress', [Person, Circle2, Circle1, Store, Book])]) 

def test_dependency_sorting_m2m_complex(self):
        """
        M2M relations with explicit through models should NOT count as
        dependencies.  The through model itself will have dependencies, though.
        """
        sorted_deps = serializers.sort_dependencies(
            [('fixtures_regress', [M2MComplexA, M2MComplexB, M2MThroughAB])]
        )
        # Order between M2MComplexA and M2MComplexB doesn't matter. The through
        # model has dependencies to them though, so it should come last.
        self.assertEqual(sorted_deps[-1], M2MThroughAB) 

def test_dependency_sorting_m2m_complex_circular_1(self):
        """
        Circular M2M relations with explicit through models should be serializable
        """
        A, B, C, AtoB, BtoC, CtoA = (M2MComplexCircular1A, M2MComplexCircular1B,
                                     M2MComplexCircular1C, M2MCircular1ThroughAB,
                                     M2MCircular1ThroughBC, M2MCircular1ThroughCA)
        sorted_deps = serializers.sort_dependencies(
            [('fixtures_regress', [A, B, C, AtoB, BtoC, CtoA])]
        )
        # The dependency sorting should not result in an error, and the
        # through model should have dependencies to the other models and as
        # such come last in the list.
        self.assertEqual(sorted_deps[:3], [A, B, C])
        self.assertEqual(sorted_deps[3:], [AtoB, BtoC, CtoA]) 

def test_dependency_sorting_m2m_complex_circular_2(self):
        """
        Circular M2M relations with explicit through models should be serializable
        This test tests the circularity with explicit natural_key.dependencies
        """
        sorted_deps = serializers.sort_dependencies([
            ('fixtures_regress', [M2MComplexCircular2A, M2MComplexCircular2B, M2MCircular2ThroughAB])
        ])
        self.assertEqual(sorted_deps[:2], [M2MComplexCircular2A, M2MComplexCircular2B])
        self.assertEqual(sorted_deps[2:], [M2MCircular2ThroughAB]) 

def test_dependency_sorting_2(self):
        sorted_deps = serializers.sort_dependencies(
            [('fixtures_regress', [Book, Store, Person])]
        )
        self.assertEqual(
            sorted_deps,
            [Store, Person, Book]
        ) 

def test_dependency_sorting_3(self):
        sorted_deps = serializers.sort_dependencies(
            [('fixtures_regress', [Store, Book, Person])]
        )
        self.assertEqual(
            sorted_deps,
            [Store, Person, Book]
        ) 

def test_dependency_sorting_4(self):
        sorted_deps = serializers.sort_dependencies(
            [('fixtures_regress', [Store, Person, Book])]
        )
        self.assertEqual(
            sorted_deps,
            [Store, Person, Book]
        ) 

def test_dependency_sorting_5(self):
        sorted_deps = serializers.sort_dependencies(
            [('fixtures_regress', [Person, Book, Store])]
        )
        self.assertEqual(
            sorted_deps,
            [Store, Person, Book]
        ) 

def test_dependency_sorting_6(self):
        sorted_deps = serializers.sort_dependencies(
            [('fixtures_regress', [Person, Store, Book])]
        )
        self.assertEqual(
            sorted_deps,
            [Store, Person, Book]
        ) 

def test_dependency_sorting_m2m_simple_circular(self):
        """
        Resolving circular M2M relations without explicit through models should
        fail loudly
        """
        with self.assertRaisesMessage(
            RuntimeError,
            "Can't resolve dependencies for fixtures_regress.M2MSimpleCircularA, "
            "fixtures_regress.M2MSimpleCircularB in serialized app list."
        ):
            serializers.sort_dependencies([('fixtures_regress', [M2MSimpleCircularA, M2MSimpleCircularB])]) 

def test_dependency_sorting_tight_circular_2(self):
        with self.assertRaisesMessage(
            RuntimeError,
            "Can't resolve dependencies for fixtures_regress.Circle1, "
            "fixtures_regress.Circle2 in serialized app list."
        ):
            serializers.sort_dependencies([('fixtures_regress', [Circle1, Book, Circle2])]) 

def test_dependency_self_referential(self):
        with self.assertRaisesMessage(
            RuntimeError,
            "Can't resolve dependencies for fixtures_regress.Circle3 in "
            "serialized app list."
        ):
            serializers.sort_dependencies([('fixtures_regress', [Book, Circle3])]) 

def test_dependency_sorting_long(self):
        with self.assertRaisesMessage(
            RuntimeError,
            "Can't resolve dependencies for fixtures_regress.Circle1, "
            "fixtures_regress.Circle2, fixtures_regress.Circle3 in serialized "
            "app list."
        ):
            serializers.sort_dependencies([('fixtures_regress', [Person, Circle2, Circle1, Circle3, Store, Book])]) 

def test_dependency_sorting_normal(self):
        sorted_deps = serializers.sort_dependencies(
            [('fixtures_regress', [Person, ExternalDependency, Book])]
        )
        self.assertEqual(
            sorted_deps,
            [Person, Book, ExternalDependency]
        ) 

def test_dependency_sorting_m2m_simple_circular(self):
        """
        Resolving circular M2M relations without explicit through models should
        fail loudly
        """
        with self.assertRaisesMessage(
            RuntimeError,
            "Can't resolve dependencies for fixtures_regress.M2MSimpleCircularA, "
            "fixtures_regress.M2MSimpleCircularB in serialized app list."
        ):
            serializers.sort_dependencies([('fixtures_regress', [M2MSimpleCircularA, M2MSimpleCircularB])]) 

def test_dependency_sorting_m2m_complex(self):
        """
        M2M relations with explicit through models should NOT count as
        dependencies.  The through model itself will have dependencies, though.
        """
        sorted_deps = serializers.sort_dependencies(
            [('fixtures_regress', [M2MComplexA, M2MComplexB, M2MThroughAB])]
        )
        # Order between M2MComplexA and M2MComplexB doesn't matter. The through
        # model has dependencies to them though, so it should come last.
        self.assertEqual(sorted_deps[-1], M2MThroughAB) 

def test_dependency_sorting_m2m_complex_circular_1(self):
        """
        Circular M2M relations with explicit through models should be serializable
        """
        A, B, C, AtoB, BtoC, CtoA = (M2MComplexCircular1A, M2MComplexCircular1B,
                                     M2MComplexCircular1C, M2MCircular1ThroughAB,
                                     M2MCircular1ThroughBC, M2MCircular1ThroughCA)
        sorted_deps = serializers.sort_dependencies(
            [('fixtures_regress', [A, B, C, AtoB, BtoC, CtoA])]
        )
        # The dependency sorting should not result in an error, and the
        # through model should have dependencies to the other models and as
        # such come last in the list.
        self.assertEqual(sorted_deps[:3], [A, B, C])
        self.assertEqual(sorted_deps[3:], [AtoB, BtoC, CtoA]) 

def test_dependency_sorting_m2m_complex_circular_2(self):
        """
        Circular M2M relations with explicit through models should be serializable
        This test tests the circularity with explicit natural_key.dependencies
        """
        sorted_deps = serializers.sort_dependencies([
            ('fixtures_regress', [M2MComplexCircular2A, M2MComplexCircular2B, M2MCircular2ThroughAB])
        ])
        self.assertEqual(sorted_deps[:2], [M2MComplexCircular2A, M2MComplexCircular2B])
        self.assertEqual(sorted_deps[2:], [M2MCircular2ThroughAB]) 

def test_dependency_sorting_4(self):
        sorted_deps = serializers.sort_dependencies(
            [('fixtures_regress', [Store, Person, Book])]
        )
        self.assertEqual(
            sorted_deps,
            [Store, Person, Book]
        ) 

def serialize_db_to_string(self):
        """
        Serialize all data in the database into a JSON string.
        Designed only for test runner usage; will not handle large
        amounts of data.
        """
        # Build list of all apps to serialize
        from django.db.migrations.loader import MigrationLoader
        loader = MigrationLoader(self.connection)
        app_list = []
        for app_config in apps.get_app_configs():
            if (
                app_config.models_module is not None and
                app_config.label in loader.migrated_apps and
                app_config.name not in settings.TEST_NON_SERIALIZED_APPS
            ):
                app_list.append((app_config, None))

        # Make a function to iteratively return every object
        def get_objects():
            for model in serializers.sort_dependencies(app_list):
                if (model._meta.can_migrate(self.connection) and
                        router.allow_migrate_model(self.connection.alias, model)):
                    queryset = model._default_manager.using(self.connection.alias).order_by(model._meta.pk.name)
                    yield from queryset.iterator()
        # Serialize to a string
        out = StringIO()
        serializers.serialize("json", get_objects(), indent=None, stream=out)
        return out.getvalue() 

def serialize_db_to_string(self):
        """
        Serialize all data in the database into a JSON string.
        Designed only for test runner usage; will not handle large
        amounts of data.
        """
        # Build list of all apps to serialize
        from django.db.migrations.loader import MigrationLoader
        loader = MigrationLoader(self.connection)
        app_list = []
        for app_config in apps.get_app_configs():
            if (
                app_config.models_module is not None and
                app_config.label in loader.migrated_apps and
                app_config.name not in settings.TEST_NON_SERIALIZED_APPS
            ):
                app_list.append((app_config, None))

        # Make a function to iteratively return every object
        def get_objects():
            for model in serializers.sort_dependencies(app_list):
                if (model._meta.can_migrate(self.connection) and
                        router.allow_migrate_model(self.connection.alias, model)):
                    queryset = model._default_manager.using(self.connection.alias).order_by(model._meta.pk.name)
                    yield from queryset.iterator()
        # Serialize to a string
        out = StringIO()
        serializers.serialize("json", get_objects(), indent=None, stream=out)
        return out.getvalue() 

def serialize_db_to_string(self):
        """
        Serializes all data in the database into a JSON string.
        Designed only for test runner usage; will not handle large
        amounts of data.
        """
        # Build list of all apps to serialize
        from django.db.migrations.loader import MigrationLoader
        loader = MigrationLoader(self.connection)
        app_list = []
        for app_config in apps.get_app_configs():
            if (
                app_config.models_module is not None and
                app_config.label in loader.migrated_apps and
                app_config.name not in settings.TEST_NON_SERIALIZED_APPS
            ):
                app_list.append((app_config, None))

        # Make a function to iteratively return every object
        def get_objects():
            for model in serializers.sort_dependencies(app_list):
                if (model._meta.can_migrate(self.connection) and
                        router.allow_migrate_model(self.connection.alias, model)):
                    queryset = model._default_manager.using(self.connection.alias).order_by(model._meta.pk.name)
                    for obj in queryset.iterator():
                        yield obj
        # Serialize to a string
        out = StringIO()
        serializers.serialize("json", get_objects(), indent=None, stream=out)
        return out.getvalue() 

def serialize_db_to_string(self):
        """
        Serializes all data in the database into a JSON string.
        Designed only for test runner usage; will not handle large
        amounts of data.
        """
        # Build list of all apps to serialize
        from django.db.migrations.loader import MigrationLoader
        loader = MigrationLoader(self.connection)
        app_list = []
        for app_config in apps.get_app_configs():
            if (
                app_config.models_module is not None and
                app_config.label in loader.migrated_apps and
                app_config.name not in settings.TEST_NON_SERIALIZED_APPS
            ):
                app_list.append((app_config, None))

        # Make a function to iteratively return every object
        def get_objects():
            for model in serializers.sort_dependencies(app_list):
                if (model._meta.can_migrate(self.connection) and
                        router.allow_migrate_model(self.connection.alias, model)):
                    queryset = model._default_manager.using(self.connection.alias).order_by(model._meta.pk.name)
                    for obj in queryset.iterator():
                        yield obj
        # Serialize to a string
        out = StringIO()
        serializers.serialize("json", get_objects(), indent=None, stream=out)
        return out.getvalue() 

def serialize_db_to_string(self):
        """
        Serializes all data in the database into a JSON string.
        Designed only for test runner usage; will not handle large
        amounts of data.
        """
        # Build list of all apps to serialize
        from django.db.migrations.loader import MigrationLoader
        loader = MigrationLoader(self.connection)
        app_list = []
        for app_config in apps.get_app_configs():
            if (
                app_config.models_module is not None and
                app_config.label in loader.migrated_apps and
                app_config.name not in settings.TEST_NON_SERIALIZED_APPS
            ):
                app_list.append((app_config, None))

        # Make a function to iteratively return every object
        def get_objects():
            for model in serializers.sort_dependencies(app_list):
                if (model._meta.can_migrate(self.connection) and
                        router.allow_migrate_model(self.connection.alias, model)):
                    queryset = model._default_manager.using(self.connection.alias).order_by(model._meta.pk.name)
                    for obj in queryset.iterator():
                        yield obj
        # Serialize to a string
        out = StringIO()
        serializers.serialize("json", get_objects(), indent=None, stream=out)
        return out.getvalue() 

def test_dependency_sorting(self):
        """
        It doesn't matter what order you mention the models,  Store *must* be
        serialized before then Person, and both must be serialized before Book.
        """
        sorted_deps = serializers.sort_dependencies(
            [('fixtures_regress', [Book, Person, Store])]
        )
        self.assertEqual(
            sorted_deps,
            [Store, Person, Book]
        ) 

def test_dependency_sorting_2(self):
        sorted_deps = serializers.sort_dependencies(
            [('fixtures_regress', [Book, Store, Person])]
        )
        self.assertEqual(
            sorted_deps,
            [Store, Person, Book]
        ) 

def test_dependency_sorting_3(self):
        sorted_deps = serializers.sort_dependencies(
            [('fixtures_regress', [Store, Book, Person])]
        )
        self.assertEqual(
            sorted_deps,
            [Store, Person, Book]
        ) 

def serialize_db_to_string(self):
        """
        Serializes all data in the database into a JSON string.
        Designed only for test runner usage; will not handle large
        amounts of data.
        """
        # Build list of all apps to serialize
        from django.db.migrations.loader import MigrationLoader
        loader = MigrationLoader(self.connection)
        app_list = []
        for app_config in apps.get_app_configs():
            if (
                app_config.models_module is not None and
                app_config.label in loader.migrated_apps and
                app_config.name not in settings.TEST_NON_SERIALIZED_APPS
            ):
                app_list.append((app_config, None))

        # Make a function to iteratively return every object
        def get_objects():
            for model in serializers.sort_dependencies(app_list):
                if (not model._meta.proxy and model._meta.managed and
                        router.allow_migrate_model(self.connection.alias, model)):
                    queryset = model._default_manager.using(self.connection.alias).order_by(model._meta.pk.name)
                    for obj in queryset.iterator():
                        yield obj
        # Serialize to a string
        out = StringIO()
        serializers.serialize("json", get_objects(), indent=None, stream=out)
        return out.getvalue() 

def test_dependency_sorting_5(self):
        sorted_deps = serializers.sort_dependencies(
            [('fixtures_regress', [Person, Book, Store])]
        )
        self.assertEqual(
            sorted_deps,
            [Store, Person, Book]
        ) 

def test_dependency_sorting_dangling(self):
        sorted_deps = serializers.sort_dependencies(
            [('fixtures_regress', [Person, Circle1, Store, Book])]
        )
        self.assertEqual(
            sorted_deps,
            [Circle1, Store, Person, Book]
        )