tfs

validateOnly=true is used to test work item creation without actually creating one.
Therefore, response contains fields of not-created-workitem.
Logically, it does not contain System.ID.
That breaks WorkItem.__init__() method that tries to self.id = self.data["id"] while data has no "id".

I try migrate rule from the old Aggregator plugin. This rule aggregate effort from children to parent.

When a item has children, the effort fields is read only by custom Hosted XML process rule (fields["MyOrg.HasChildren"] == "true").

The Aggregator rule is 3 step

1. Set the field "MyOrg.HasChildren" to empty
2. Set effort value
3. Set the field "MyOrg.HasChildren" to true

This is the