Burton Rhodes created WW-4865:
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Summary: Struts s:checkbox conversion fails to List<Integer>
Key: WW-4865
URL: https://issues.apache.org/jira/browse/WW-4865
Project: Struts 2
Issue Type: Bug
Components: Core, Core Tags
Affects Versions: 2.5.13
Reporter: Burton Rhodes
Priority: Minor
Struts <s:checkbox> is not converted correctly to List<Integer> when only one
checkbox element is present and checkbox is not checked.
[Given]
1) Mapping s:checkbox to a List<Integer>
2) there is only one checkbox in the list
3) the checkbox is not checked when the form is submitted.
[Result]
Input invalid
The issue is caused by the checkbox tag using the "submit unchecked values"
design pattern. As a result, the code base tries to convert the value of the
single unchecked element to false (rather than not setting any value of the
List<Integer>).
Fix: Allow the developer to choose if the "submit unchecked values" is to be
implemented. Add a new parameter to the s:checkbox tag ("requiredValue").
Default of requiredValue=true for backwards compatibility. When set to false,
no hidden input values will be displayed in the view. This flexibility might
be needed in other scenarios as well.
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