Modify group msg notification to make index friendly.

group/handlers.py

@@ -6,15 +6,22 @@ from seahub.notifications.models import UserNotification
 def grpmsg_added_cb(sender, **kwargs):
     group_id = kwargs['group_id']
     from_email = kwargs['from_email']
-    l = UserNotification.objects.filter(msg_type='group_msg', detail=group_id)
-    if len(l) == 0:
     group_members = ccnet_threaded_rpc.get_group_members(int(group_id))
     for m in group_members:
         if from_email == m.user_name:
             continue
+        try:
+            UserNotification.objects.get(to_user=m.user_name,
+                                         msg_type='group_msg',
+                                         detail=group_id)
+        except UserNotification.DoesNotExist:
             n = UserNotification(to_user=m.user_name, msg_type='group_msg',
                                  detail=group_id)
             n.save()
-    else:
+            
-        pass
+    
+
+            
+            
+
     

group/views.py

@@ -142,6 +142,7 @@ def render_group_info(request, group_id, form):
 
     # remove user notifications
     UserNotification.objects.filter(to_user=request.user.username,
+                                    msg_type='group_msg',
                                     detail=str(group_id)).delete()
     
     """group messages"""