[MYFACES-3389] Duplicate Id error when model of forEach is changed

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Invalid
• Affects Version/s: 2.1.2
• Assignee: Leonardo Uribe
• Reporter: Michael Dietrich
• Created: 08/Nov/11 07:36
• Updated: 15/Jun/12 08:15
• Resolved: 26/Jan/12 16:01

Description

We have a use case, where the model (i.e. items) of a forEach is changed in the Invoke Application phase, in a way that rows are added or deleted in the middle of the model.
During the buildView(...) in the Render Response phase, the forEach Tag Handler recognizes, that the model has changed, and for example that now one more row is available, but it does not recognize, that this row was not added as last row. So the forEach Tag Handler logic starts to create additional components for the additional row, but it creates these components for entries at the end of the model. The issue is, that there already exist components for the last row in the UIViewRoot and these componts already have the same Ids than the newly created ones. Thus we end up with a Duplicate Id Exception

The attached file might help you, to recreate the issue with a simple example.

Issue Links

• relates to: MYFACES-3570 c:forEach may cause MyFaces to be buggy (works fine on mojarra)