fix transfer migration

oml/update.py

@@ -544,6 +544,7 @@ def migrate_11():
         session.commit()
         import state
         import downloads
+        state.online = False
         state.downloads = downloads.Downloads()
         for t in Transfer.query:
             if t.added:
@@ -553,5 +554,7 @@ def migrate_11():
                 }
             state.db.session.add(t)
         state.db.session.commit()
-        downloads.join()
+        state.shutdown = True
+        state.downloads.join()
+        state.downlodas = None
     return 11

oml/websocket.py

@@ -35,7 +35,7 @@ class Handler(WebSocketHandler):
         if self not in state.websockets:
             state.websockets.append(self)
         if state.update:
-            trigger_event('updatestatus', state.tasks._status)
+            trigger_event('updatestatus', state.update._status)
         else:
             from user.models import User
             trigger_event('status', {