From cf1b0e45f0e031801b2f0650bb3be741e8002926 Mon Sep 17 00:00:00 2001
From: Damien Elmes <git@ichi2.net>
Date: Fri, 26 Jun 2009 07:28:43 +0900
Subject: [PATCH] don't let user remove facts by disabling all card models

---
 ankiqt/ui/cardlist.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/ankiqt/ui/cardlist.py b/ankiqt/ui/cardlist.py
index 9f890d36f..c7eabb5ad 100644
--- a/ankiqt/ui/cardlist.py
+++ b/ankiqt/ui/cardlist.py
@@ -1274,6 +1274,9 @@ class ChangeModelDialog(QDialog):
                         not fmap):
             return ui.utils.showInfo(
                 _("Targets must be unique."), parent=self)
+        if not any(cmap.values()):
+            return ui.utils.showInfo(
+                _("Must map at least one template."), parent=self)
         if self.targetModel == self.oldModel:
             self.ret = (self.targetModel, None, cmap)
             return QDialog.accept(self)