Update app.py

app.py

@@ -403,6 +403,8 @@ def downvote_model(model, uname):
 
 def a_is_better(model1, model2, userid):
     print("A is better", model1, model2)
+    if not model1 in AVAILABLE_MODELS.keys() and not model1 in AVAILABLE_MODELS.values():
+        raise gr.Error('Sorry, please try voting again.')
     userid = mkuuid(userid)
     if model1 and model2:
         conn = get_db()
@@ -416,6 +418,8 @@ def a_is_better(model1, model2, userid):
     return reload(model1, model2, userid, chose_a=True)
 def b_is_better(model1, model2, userid):
     print("B is better", model1, model2)
+    if not model1 in AVAILABLE_MODELS.keys() and not model1 in AVAILABLE_MODELS.values():
+        raise gr.Error('Sorry, please try voting again.')
     userid = mkuuid(userid)
     if model1 and model2:
         conn = get_db()