Fixed two issues arising when the backend is used against Django v1.5:

sql_server/pyodbc/base.py

@@ -21,7 +21,12 @@
 from django.db.backends.signals import connection_created
 from django.conf import settings
 from django import VERSION as DjangoVersion
-if DjangoVersion[:2] == (1,4):
+
+if DjangoVersion[:2] == (1,5):
+	# Django version 1.5 requires connection to be passed 
+	# to BaseDatabaseOperations
+	_DJANGO_VERSION = 15
+elif DjangoVersion[:2] == (1,4):
     # Django version 1.4 adds a backwards incompatible change to
     # DatabaseOperations
     _DJANGO_VERSION = 14

sql_server/pyodbc/compiler.py

@@ -165,7 +165,7 @@ def _as_sql(self, strategy):
             result.append('WHERE %s' % where)
             params.extend(w_params)
 
-        grouping, gb_params = self.get_grouping()
+        grouping, gb_params = self.get_grouping( ordering_group_by )
         if grouping:
             if ordering:
                 # If the backend can't group by PK (i.e., any database