sort nestet items

inventory/admin/item.py

@@ -48,7 +48,7 @@ class ItemModelAdmin(ImportExportMixin, BaseUserAdmin):
 
     def column_item(self, obj):
         qs = ItemModel.objects.filter(user=self.user)
-        qs = qs.filter(parent=obj)
+        qs = qs.filter(parent=obj).sort()
         context = {
             'base_item': obj,
             'sub_items': qs

inventory/models/item.py

@@ -8,10 +8,17 @@ from inventory.models.base import BaseModel
 from inventory.models.links import BaseLink
 
 
+class ItemQuerySet(models.QuerySet):
+    def sort(self):
+        return self.order_by('kind', 'producer', 'name')
+
+
 class ItemModel(BaseModel):
     """
     A Item that can be described and store somewhere ;)
     """
+    objects = ItemQuerySet.as_manager()
+
     kind = tagulous.models.TagField(
         case_sensitive=False,
         force_lowercase=False,