If brain is the same as obj, it's better to grab values using accessors,...

If brain is the same as obj, it's better to grab values using accessors, instead of reading brain attributes (this solves discrepancies between what a listbox displays and what the accessor computes on a document).
In the process, replace a hasattr by a getattr.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@20540 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/ListBox.py

@@ -1940,7 +1940,7 @@ class ListBoxRendererLine:
 
         # If a tales expression is not defined, get a skin, an accessor or a property.
         if not tales:
-          if hasattr(aq_self(brain), alias):
+          if brain is not obj and getattr(aq_self(brain), alias, None) is not None:
             original_value = getattr(brain, alias)
             processed_value = original_value
           elif obj is not None: