seminar | admin | kdyz cislo nema prirazene cislo reseni

Kdyz cislo nema prirazene cislo reseni,
tak nelze zjistovat fazy

seminar/admin.py

@@ -418,8 +418,9 @@ class ProblemAdmin(VersionAdmin):
             return readonly_fields
         if obj.cislo_zadani.faze != 'admin':
             readonly_fields += ['nazev', 'text_zadani', 'body']
-        if obj.cislo_reseni.faze != 'admin':
+        if obj.cislo_reseni:
-            readonly_fields += ['text_reseni']
+            if obj.cislo_reseni.faze != 'admin':
+                readonly_fields += ['text_reseni']
         return readonly_fields
 
     def get_queryset(self, request):