Corrigido ordenação de AlphabeticFilterSpec.

sigi/admin/filterspecs.py

@@ -18,9 +18,10 @@ class AlphabeticFilterSpec(ChoicesFilterSpec):
                                                    model_admin)
         self.lookup_kwarg = '%s__istartswith' % f.name
         self.lookup_val = request.GET.get(self.lookup_kwarg, None)
-        values_list = model.objects.values_list(f.name, flat=True).order_by(f.name)
+        values_list = model.objects.values_list(f.name, flat=True)
         # getting the first char of values
-        self.lookup_choices = set(val[0] for val in values_list)
+        self.lookup_choices = list(set(val[0] for val in values_list))
+        self.lookup_choices.sort()
 
     def choices(self, cl):
         yield {'selected': self.lookup_val is None,