testing documented object before calling Description()

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@23424 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/DocumentationHelper/CatalogMethodDocumentationHelper.py

@@ -66,7 +66,7 @@ class CatalogMethodDocumentationHelper(DocumentationHelper):
   security.declareProtected(Permissions.AccessContentsInformation, 'getSource' )
   def getSource(self):
     """
-    Returns the source code of the documentation helper
+    Returns the source code the catalog method
     """
     from zLOG import LOG, INFO
     source_code = getattr(self.getDocumentedObject(), 'src', '')

product/ERP5Type/DocumentationHelper/PortalTypeRoleDocumentationHelper.py

@@ -44,7 +44,11 @@ class PortalTypeRoleDocumentationHelper(DocumentationHelper):
 
   security.declareProtected(Permissions.AccessContentsInformation, 'getDescription')
   def getDescription(self):
-    return self.getDocumentedObject().Description()
+    documented_object = self.getDocumentedObject()
+    if documented_object is not None:
+      return documented_object.Description()
+    else:
+      return ''
 
   security.declareProtected(Permissions.AccessContentsInformation, 'getType' )
   def getType(self):