Python DjangoKeyValueStore.get方法代码示例

# 需要导入模块: from courseware.model_data import DjangoKeyValueStore [as 别名]
# 或者: from courseware.model_data.DjangoKeyValueStore import get [as 别名]
class TestStudentModuleStorage(OtherUserFailureTestMixin, TestCase):
    """Tests for user_state storage via StudentModule"""
    other_key_factory = partial(DjangoKeyValueStore.Key, Scope.user_state, 2, location('usage_id'))  # user_id=2, not 1
    existing_field_name = "a_field"

    def setUp(self):
        super(TestStudentModuleStorage, self).setUp()
        student_module = StudentModuleFactory(state=json.dumps({'a_field': 'a_value', 'b_field': 'b_value'}))
        self.user = student_module.student
        self.assertEqual(self.user.id, 1)   # check our assumption hard-coded in the key functions above.

        # There should be only one query to load a single descriptor with a single user_state field
        with self.assertNumQueries(1):
            self.field_data_cache = FieldDataCache(
                [mock_descriptor([mock_field(Scope.user_state, 'a_field')])], course_id, self.user
            )

        self.kvs = DjangoKeyValueStore(self.field_data_cache)

    def test_get_existing_field(self):
        "Test that getting an existing field in an existing StudentModule works"
        # This should only read from the cache, not the database
        with self.assertNumQueries(0):
            self.assertEquals('a_value', self.kvs.get(user_state_key('a_field')))

    def test_get_missing_field(self):
        "Test that getting a missing field from an existing StudentModule raises a KeyError"
        # This should only read from the cache, not the database
        with self.assertNumQueries(0):
            self.assertRaises(KeyError, self.kvs.get, user_state_key('not_a_field'))

    def test_set_existing_field(self):
        "Test that setting an existing user_state field changes the value"
        # We are updating a problem, so we write to courseware_studentmodulehistory
        # as well as courseware_studentmodule. We also need to read the database
        # to discover if something other than the DjangoXBlockUserStateClient
        # has written to the StudentModule (such as UserStateCache setting the score
        # on the StudentModule).
        with self.assertNumQueries(3):
            self.kvs.set(user_state_key('a_field'), 'new_value')
        self.assertEquals(1, StudentModule.objects.all().count())
        self.assertEquals({'b_field': 'b_value', 'a_field': 'new_value'}, json.loads(StudentModule.objects.all()[0].state))

    def test_set_missing_field(self):
        "Test that setting a new user_state field changes the value"
        # We are updating a problem, so we write to courseware_studentmodulehistory
        # as well as courseware_studentmodule. We also need to read the database
        # to discover if something other than the DjangoXBlockUserStateClient
        # has written to the StudentModule (such as UserStateCache setting the score
        # on the StudentModule).
        with self.assertNumQueries(3):
            self.kvs.set(user_state_key('not_a_field'), 'new_value')
        self.assertEquals(1, StudentModule.objects.all().count())
        self.assertEquals({'b_field': 'b_value', 'a_field': 'a_value', 'not_a_field': 'new_value'}, json.loads(StudentModule.objects.all()[0].state))

    def test_delete_existing_field(self):
        "Test that deleting an existing field removes it from the StudentModule"
        # We are updating a problem, so we write to courseware_studentmodulehistory
        # as well as courseware_studentmodule. We also need to read the database
        # to discover if something other than the DjangoXBlockUserStateClient
        # has written to the StudentModule (such as UserStateCache setting the score
        # on the StudentModule).
        with self.assertNumQueries(3):
            self.kvs.delete(user_state_key('a_field'))
        self.assertEquals(1, StudentModule.objects.all().count())
        self.assertRaises(KeyError, self.kvs.get, user_state_key('not_a_field'))

    def test_delete_missing_field(self):
        "Test that deleting a missing field from an existing StudentModule raises a KeyError"
        with self.assertNumQueries(0):
            self.assertRaises(KeyError, self.kvs.delete, user_state_key('not_a_field'))
        self.assertEquals(1, StudentModule.objects.all().count())
        self.assertEquals({'b_field': 'b_value', 'a_field': 'a_value'}, json.loads(StudentModule.objects.all()[0].state))

    def test_has_existing_field(self):
        "Test that `has` returns True for existing fields in StudentModules"
        with self.assertNumQueries(0):
            self.assertTrue(self.kvs.has(user_state_key('a_field')))

    def test_has_missing_field(self):
        "Test that `has` returns False for missing fields in StudentModule"
        with self.assertNumQueries(0):
            self.assertFalse(self.kvs.has(user_state_key('not_a_field')))

    def construct_kv_dict(self):
        """Construct a kv_dict that can be passed to set_many"""
        key1 = user_state_key('field_a')
        key2 = user_state_key('field_b')
        new_value = 'new value'
        newer_value = 'newer value'
        return {key1: new_value, key2: newer_value}

    def test_set_many(self):
        "Test setting many fields that are scoped to Scope.user_state"
        kv_dict = self.construct_kv_dict()

        # Scope.user_state is stored in a single row in the database, so we only
        # need to send a single update to that table.
        # We also are updating a problem, so we write to courseware student module history
        # We also need to read the database to discover if something other than the
#.........这里部分代码省略.........

# 需要导入模块: from courseware.model_data import DjangoKeyValueStore [as 别名]
# 或者: from courseware.model_data.DjangoKeyValueStore import get [as 别名]
class StorageTestBase(object):
    """
    A base class for that gets subclassed when testing each of the scopes.

    """
    # Disable pylint warnings that arise because of the way the child classes call
    # this base class -- pylint's static analysis can't keep up with it.
    # pylint: disable=no-member, not-callable

    factory = None
    scope = None
    key_factory = None
    storage_class = None

    def setUp(self):
        field_storage = self.factory.create()
        if hasattr(field_storage, 'student'):
            self.user = field_storage.student
        else:
            self.user = UserFactory.create()
        self.mock_descriptor = mock_descriptor([
            mock_field(self.scope, 'existing_field'),
            mock_field(self.scope, 'other_existing_field')])
        # Each field is stored as a separate row in the table,
        # but we can query them in a single query
        with self.assertNumQueries(1):
            self.field_data_cache = FieldDataCache([self.mock_descriptor], course_id, self.user)
        self.kvs = DjangoKeyValueStore(self.field_data_cache)

    def test_set_and_get_existing_field(self):
        with self.assertNumQueries(1):
            self.kvs.set(self.key_factory('existing_field'), 'test_value')
        with self.assertNumQueries(0):
            self.assertEquals('test_value', self.kvs.get(self.key_factory('existing_field')))

    def test_get_existing_field(self):
        "Test that getting an existing field in an existing Storage Field works"
        with self.assertNumQueries(0):
            self.assertEquals('old_value', self.kvs.get(self.key_factory('existing_field')))

    def test_get_missing_field(self):
        "Test that getting a missing field from an existing Storage Field raises a KeyError"
        with self.assertNumQueries(0):
            self.assertRaises(KeyError, self.kvs.get, self.key_factory('missing_field'))

    def test_set_existing_field(self):
        "Test that setting an existing field changes the value"
        with self.assertNumQueries(1):
            self.kvs.set(self.key_factory('existing_field'), 'new_value')
        self.assertEquals(1, self.storage_class.objects.all().count())
        self.assertEquals('new_value', json.loads(self.storage_class.objects.all()[0].value))

    def test_set_missing_field(self):
        "Test that setting a new field changes the value"
        with self.assertNumQueries(1):
            self.kvs.set(self.key_factory('missing_field'), 'new_value')
        self.assertEquals(2, self.storage_class.objects.all().count())
        self.assertEquals('old_value', json.loads(self.storage_class.objects.get(field_name='existing_field').value))
        self.assertEquals('new_value', json.loads(self.storage_class.objects.get(field_name='missing_field').value))

    def test_delete_existing_field(self):
        "Test that deleting an existing field removes it"
        with self.assertNumQueries(1):
            self.kvs.delete(self.key_factory('existing_field'))
        self.assertEquals(0, self.storage_class.objects.all().count())

    def test_delete_missing_field(self):
        "Test that deleting a missing field from an existing Storage Field raises a KeyError"
        with self.assertNumQueries(0):
            self.assertRaises(KeyError, self.kvs.delete, self.key_factory('missing_field'))
        self.assertEquals(1, self.storage_class.objects.all().count())

    def test_has_existing_field(self):
        "Test that `has` returns True for an existing Storage Field"
        with self.assertNumQueries(0):
            self.assertTrue(self.kvs.has(self.key_factory('existing_field')))

    def test_has_missing_field(self):
        "Test that `has` return False for an existing Storage Field"
        with self.assertNumQueries(0):
            self.assertFalse(self.kvs.has(self.key_factory('missing_field')))

    def construct_kv_dict(self):
        """Construct a kv_dict that can be passed to set_many"""
        key1 = self.key_factory('existing_field')
        key2 = self.key_factory('other_existing_field')
        new_value = 'new value'
        newer_value = 'newer value'
        return {key1: new_value, key2: newer_value}

    def test_set_many(self):
        """Test that setting many regular fields at the same time works"""
        kv_dict = self.construct_kv_dict()

        # Each field is a separate row in the database, hence
        # a separate query
        with self.assertNumQueries(len(kv_dict)):
            self.kvs.set_many(kv_dict)
        for key in kv_dict:
            self.assertEquals(self.kvs.get(key), kv_dict[key])
#.........这里部分代码省略.........

# 需要导入模块: from courseware.model_data import DjangoKeyValueStore [as 别名]
# 或者: from courseware.model_data.DjangoKeyValueStore import get [as 别名]
class TestStudentModuleStorage(OtherUserFailureTestMixin, TestCase):
    """Tests for user_state storage via StudentModule"""
    other_key_factory = partial(DjangoKeyValueStore.Key, Scope.user_state, 2, location('usage_id'))  # user_id=2, not 1
    existing_field_name = "a_field"

    def setUp(self):
        student_module = StudentModuleFactory(state=json.dumps({'a_field': 'a_value', 'b_field': 'b_value'}))
        self.user = student_module.student
        self.assertEqual(self.user.id, 1)   # check our assumption hard-coded in the key functions above.
        self.field_data_cache = FieldDataCache([mock_descriptor([mock_field(Scope.user_state, 'a_field')])], course_id, self.user)
        self.kvs = DjangoKeyValueStore(self.field_data_cache)

    def test_get_existing_field(self):
        "Test that getting an existing field in an existing StudentModule works"
        self.assertEquals('a_value', self.kvs.get(user_state_key('a_field')))

    def test_get_missing_field(self):
        "Test that getting a missing field from an existing StudentModule raises a KeyError"
        self.assertRaises(KeyError, self.kvs.get, user_state_key('not_a_field'))

    def test_set_existing_field(self):
        "Test that setting an existing user_state field changes the value"
        self.kvs.set(user_state_key('a_field'), 'new_value')
        self.assertEquals(1, StudentModule.objects.all().count())
        self.assertEquals({'b_field': 'b_value', 'a_field': 'new_value'}, json.loads(StudentModule.objects.all()[0].state))

    def test_set_missing_field(self):
        "Test that setting a new user_state field changes the value"
        self.kvs.set(user_state_key('not_a_field'), 'new_value')
        self.assertEquals(1, StudentModule.objects.all().count())
        self.assertEquals({'b_field': 'b_value', 'a_field': 'a_value', 'not_a_field': 'new_value'}, json.loads(StudentModule.objects.all()[0].state))

    def test_delete_existing_field(self):
        "Test that deleting an existing field removes it from the StudentModule"
        self.kvs.delete(user_state_key('a_field'))
        self.assertEquals(1, StudentModule.objects.all().count())
        self.assertRaises(KeyError, self.kvs.get, user_state_key('not_a_field'))

    def test_delete_missing_field(self):
        "Test that deleting a missing field from an existing StudentModule raises a KeyError"
        self.assertRaises(KeyError, self.kvs.delete, user_state_key('not_a_field'))
        self.assertEquals(1, StudentModule.objects.all().count())
        self.assertEquals({'b_field': 'b_value', 'a_field': 'a_value'}, json.loads(StudentModule.objects.all()[0].state))

    def test_has_existing_field(self):
        "Test that `has` returns True for existing fields in StudentModules"
        self.assertTrue(self.kvs.has(user_state_key('a_field')))

    def test_has_missing_field(self):
        "Test that `has` returns False for missing fields in StudentModule"
        self.assertFalse(self.kvs.has(user_state_key('not_a_field')))

    def construct_kv_dict(self):
        """Construct a kv_dict that can be passed to set_many"""
        key1 = user_state_key('field_a')
        key2 = user_state_key('field_b')
        new_value = 'new value'
        newer_value = 'newer value'
        return {key1: new_value, key2: newer_value}

    def test_set_many(self):
        "Test setting many fields that are scoped to Scope.user_state"
        kv_dict = self.construct_kv_dict()
        self.kvs.set_many(kv_dict)

        for key in kv_dict:
            self.assertEquals(self.kvs.get(key), kv_dict[key])

    def test_set_many_failure(self):
        "Test failures when setting many fields that are scoped to Scope.user_state"
        kv_dict = self.construct_kv_dict()
        # because we're patching the underlying save, we need to ensure the
        # fields are in the cache
        for key in kv_dict:
            self.kvs.set(key, 'test_value')

        with patch('django.db.models.Model.save', side_effect=DatabaseError):
            with self.assertRaises(KeyValueMultiSaveError) as exception_context:
                self.kvs.set_many(kv_dict)
        self.assertEquals(len(exception_context.exception.saved_field_names), 0)