AjaxFallbackDefaultDataTable gives misleading error when fragment markup cannot
be found
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Key: WICKET-1657
URL: https://issues.apache.org/jira/browse/WICKET-1657
Project: Wicket
Issue Type: Improvement
Components: wicket-extensions
Affects Versions: 1.3.0-final
Reporter: Nick Johnson
Priority: Minor
If you call cellItem.add(new Fragment("foo","bar", myPage, model), but the
fragment markup for "bar" isn't found in the markup for myPage,
AjaxFallbackDefaultDataTable complains, "failed to add a
component with id [cell] to the provided [cellItem] object." The error
suggests making sure that cellItem.add was called.
This error can be misleading, especially since cellItem.add was called. What
really happened was the fragment with a given ID wasn't found, which should
really have been an error in its own right.
It would be nice if the error message gave a better description indicating the
reason why the component failed to add (e.g., an error in handling the
Fragment).
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