Ticket #18618: 18618.diff

django/contrib/admin/util.py

@@ -314 +314 @@
     from django.contrib.admin.views.main import EMPTY_CHANGELIST_VALUE
 
     if field.flatchoices:
+        if isinstance(value, (list, tuple)):
+            ret = []
+            for v in value:
+                ret.append(dict(field.flatchoices).get(v, EMPTY_CHANGELIST_VALUE))
+            return '; '.join(ret)
         return dict(field.flatchoices).get(value, EMPTY_CHANGELIST_VALUE)
     # NullBooleanField needs special-case null-handling, so it comes
     # before the general null test.