Hi,
I am getting a strange exception during submit of a Tapestry form that I cannot
explain. It happens just rarely (but regularily) in the production environment.
I cannot even reproduce the exception.
I have a form in tml file of a Tapestry component.
...
<t:form t:id="searchForm" clientValidation="none">
....
<t:select t:id="globalSport" model="globalSportModel"
value="formData.globalSportId" blankOption="never"/>
....
</t:form>
..
And here is the important part of corresponding Java file:
...
@Property(read = true, write = false)
private ServiceSearchFormData formData;
...
@OnEvent(value = EventConstants.PREPARE_FOR_SUBMIT, component = "searchForm")
void prepareForSubmit()
{
formData = new ServiceSearchFormData();
}
...
It seems to be pretty straightforward. ServiceSearchFormData is a DTO with few
attributes and getter / setter methods. It encapsulates data submitted in the
form. An instance is created on "prepare for submit" event.
The exception occurs in scope of a POST request that submits data to this form.
The exception message states:
Failure writing parameter 'value' of component
MyPortal:portalindex.portalsearchform.globalsport: Property 'formData' (within
property expression 'formData.globalSportId', of
cz.ftm.fitsoftware.webapp.components.PortalSearchForm@3262579e) is null.
I have no idea how this happens. How can the property formData be
uninitialized? It seems that the method prepareForSubmit is not called.
Thanks for help.
Jarda
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