Fixed #5461 -- Refactored the database backend code to use classes for the creation and introspection modules. Introduces a new validation module for DB-specific validation. This is a backwards incompatible change; see the wiki for details.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8296 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/backends/postgresql_psycopg2/base.py

@@ -4,8 +4,12 @@ PostgreSQL database backend for Django.
 Requires psycopg 2: http://initd.org/projects/psycopg2
 """
 
-from django.db.backends import BaseDatabaseWrapper, BaseDatabaseFeatures
+from django.db.backends import *
 from django.db.backends.postgresql.operations import DatabaseOperations as PostgresqlDatabaseOperations
+from django.db.backends.postgresql.client import DatabaseClient
+from django.db.backends.postgresql.creation import DatabaseCreation
+from django.db.backends.postgresql_psycopg2.introspection import DatabaseIntrospection
+
 from django.utils.safestring import SafeUnicode
 try:
     import psycopg2 as Database
@@ -31,8 +35,6 @@ class DatabaseOperations(PostgresqlDatabaseOperations):
         return cursor.query
 
 class DatabaseWrapper(BaseDatabaseWrapper):
-    features = DatabaseFeatures()
-    ops = DatabaseOperations()
     operators = {
         'exact': '= %s',
         'iexact': 'ILIKE %s',
@@ -50,6 +52,16 @@ class DatabaseWrapper(BaseDatabaseWrapper):
         'iendswith': 'ILIKE %s',
     }
 
+    def __init__(self, *args, **kwargs):
+        super(DatabaseWrapper, self).__init__(*args, **kwargs)
+        
+        self.features = DatabaseFeatures()
+        self.ops = DatabaseOperations()
+        self.client = DatabaseClient()
+        self.creation = DatabaseCreation(self)
+        self.introspection = DatabaseIntrospection(self)
+        self.validation = BaseDatabaseValidation()
+
     def _cursor(self, settings):
         set_tz = False
         if self.connection is None: