1 """

     2 Dummy database backend for Django.

     3 

     4 Django uses this if the DATABASE_ENGINE setting is empty (None or empty string).

     5 

     6 Each of these API functions, except connection.close(), raises

     7 ImproperlyConfigured.

     8 """

     9 

    10 from django.core.exceptions import ImproperlyConfigured

    11 from django.db.backends import BaseDatabaseFeatures, BaseDatabaseOperations

    12 

    13 def complain(*args, **kwargs):

    14     raise ImproperlyConfigured, "You haven't set the DATABASE_ENGINE setting yet."

    15 

    16 def ignore(*args, **kwargs):

    17     pass

    18 

    19 class DatabaseError(Exception):

    20     pass

    21 

    22 class IntegrityError(DatabaseError):

    23     pass

    24 

    25 class DatabaseOperations(BaseDatabaseOperations):

    26     quote_name = complain

    27 

    28 class DatabaseWrapper(object):

    29     features = BaseDatabaseFeatures()

    30     ops = DatabaseOperations()

    31     operators = {}

    32     cursor = complain

    33     _commit = complain

    34     _rollback = ignore

    35 

    36     def __init__(self, **kwargs):

    37         pass

    38 

    39     def close(self):

    40         pass