Explicitly check if attribute_value is a string instead of not a unicode...

Explicitly check if attribute_value is a string instead of not a unicode string. Also, if attribute_value is None, set it to an empty string.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@1431 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/ListBox.py

@@ -1353,8 +1353,10 @@ onChange="submitAction(this.form,'%s/portal_selections/setReportRoot')">
                 td_align = "left"
               # It is safer to convert attribute_value to an unicode string, because
               # it might be utf-8.
-              if type(attribute_value) != type(u''):
+              if type(attribute_value) == type(''):
                 attribute_value = unicode(attribute_value, 'utf-8')
+              elif attribute_value is None:
+                attribute_value = ''
               if sql in editable_column_ids and form.has_field('%s_%s' % (field.id, alias) ):
                 key = my_field.id + '_%s' % o.uid
                 if field_errors.has_key(key):