Only add the category ID if it is not already in _categories, which

may happen when getting the categories with acquisition as done in
test_getAcquiredCategoryList for example. This fixes testERP5Category.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@43959 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/Core/CategoryProperty.py

@@ -229,6 +229,9 @@ class CategoryProperty(IdAsReferenceMixin('_category'), XMLObject):
         accessor = Alias.Reindex(accessor_name[1:], accessor_name)
         accessor_holder.registerAccessor(accessor, write_permission)
 
+    # Only add the category ID if it is not already in _categories,
+    # which may happen when getting the categories with acquisition
+    if category_id not in accessor_holder._categories:
       accessor_holder._categories.append(category_id)
 
   security.declareProtected(Permissions.AccessContentsInformation,