r9074 had some side effects with Interaction Workflows which doesn't reset

workflow_history if it's None; so it's safer to del the attribute.



git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@9173 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/BusinessTemplate.py

@@ -378,7 +378,10 @@ class BaseTemplateItem(Implicit, Persistent):
     if hasattr(aq_base(obj), '_filepath'):
       obj._filepath = None
     if hasattr(aq_base(obj), 'workflow_history'):
+      if hasattr(obj.__class__, 'workflow_history'):
         obj.workflow_history = None
+      else:
+        del obj.workflow_history
     if getattr(obj, 'meta_type', None) == 'Script (Python)':
       if hasattr(aq_base(obj), '_code'):
         obj._code = None