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 *

    12 from django.db.backends.creation import BaseDatabaseCreation

    13 

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

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

    16 

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

    18     pass

    19 

    20 class DatabaseError(Exception):

    21     pass

    22 

    23 class IntegrityError(DatabaseError):

    24     pass

    25 

    26 class DatabaseOperations(BaseDatabaseOperations):

    27     quote_name = complain

    28 

    29 class DatabaseClient(BaseDatabaseClient):

    30     runshell = complain

    31 

    32 class DatabaseIntrospection(BaseDatabaseIntrospection):

    33     get_table_list = complain

    34     get_table_description = complain

    35     get_relations = complain

    36     get_indexes = complain

    37 

    38 class DatabaseWrapper(object):

    39     operators = {}

    40     cursor = complain

    41     _commit = complain

    42     _rollback = ignore

    43 

    44     def __init__(self, *args, **kwargs):

    45         self.features = BaseDatabaseFeatures()

    46         self.ops = DatabaseOperations()

    47         self.client = DatabaseClient(self)

    48         self.creation = BaseDatabaseCreation(self)

    49         self.introspection = DatabaseIntrospection(self)

    50         self.validation = BaseDatabaseValidation()

    51 

    52     def close(self):

    53         pass