[jira] [Created] (WICKET-5386) ChainingModel should not check if the modelObject given as argument is null

["Frédéric Donckels (JIRA)" <ji...@apache.org>]

Frédéric Donckels created WICKET-5386:
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             Summary: ChainingModel should not check if the modelObject given as argument is null
                 Key: WICKET-5386
                 URL: https://issues.apache.org/jira/browse/WICKET-5386
             Project: Wicket
          Issue Type: Bug
          Components: wicket
    Affects Versions: 6.11.0
            Reporter: Frédéric Donckels


In Wicket 1.5.x there was no check against the null value of the target of a CompoundPropertyModel.

This allowed to define a CPM based on a possibly value, then being able to refer to sub-properties of that value in through labels included in the markup without fearing a NullPointerException, nice empty labels would be displayed instead.

Now that CPM has been refactored, null values are explicitly rejected, but only in the constructor.
Changing the model through a call to setObject doesn't check the null value and allows the previous behaviour to work again.
(another workaround is to pass Model.of(value) in the constructor).

These are workarounds, the check itself adds no value and removes functionality.



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