Fixed #15293 -- Updated the dummy backend to support the APIs introduced by r15493. Thanks to mp for the report.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@15528 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/backends/dummy/base.py

@@ -35,26 +35,32 @@ class DatabaseIntrospection(BaseDatabaseIntrospection):
     get_relations = complain
     get_indexes = complain
 
-class DatabaseWrapper(object):
+class DatabaseWrapper(BaseDatabaseWrapper):
     operators = {}
-    cursor = complain
+    # Override the base class implementations with null
+    # implementations. Anything that tries to actually
+    # do something raises complain; anything that tries
+    # to rollback or undo something raises ignore.
     _commit = complain
     _rollback = ignore
+    enter_transaction_management = complain
+    leave_transaction_management = ignore
+    set_dirty = complain
+    set_clean = complain
+    commit_unless_managed = complain
+    rollback_unless_managed = ignore
+    savepoint = ignore
+    savepoint_commit = complain
+    savepoint_rollback = ignore
+    close = ignore
+    cursor = complain
+
+    def __init__(self, *args, **kwargs):
+        super(DatabaseWrapper, self).__init__(*args, **kwargs)
 
-    def __init__(self, settings_dict, alias, *args, **kwargs):
         self.features = BaseDatabaseFeatures(self)
         self.ops = DatabaseOperations()
         self.client = DatabaseClient(self)
         self.creation = BaseDatabaseCreation(self)
         self.introspection = DatabaseIntrospection(self)
         self.validation = BaseDatabaseValidation(self)
-
-        self.settings_dict = settings_dict
-        self.alias = alias
-
-        self.transaction_state = []
-        self.savepoint_state = 0
-        self.dirty = None
-
-    def close(self):
-        pass