Hello all.
In my app, I use the DynaActionForm, because it makes it much easier to
declare all the forms I need. However, it is giving me a problem with
Boolean type variables used in checkboxes.
Specifically, I have the following form-bean:
<form-bean
name="test_form"
type="org.apache.struts.action.DynaActionForm">
<form-property
name="Download"
type="java.lang.Boolean"
initial="true"/>
</form-bean>
In my JSP, I have:
<html:checkbox property="Download"/>
This is properly checked by default.
The problem is that when a user unchecks the checkbox, this is not
noticed in the form, due to the infamous
HTTP-doesn't-send-empty-parameters problem. The canonical advice I have
seen is 'set the property to false in the form's reset() method'.
This has two problems:
a) DynaActionForm's reset does nothing by default. Is there really no
support for this common thing in DynaActionForm?
b) I created a subclass on DynaActionForm, which had a reset() method
that only sets that property to false. However, the ActionForm.reset()
method is apparently called via the <html:form> tag, (the doStartTag()
method calls initFormBean(), which calls the form bean's reset()
method). This means that the checkbox is initially unchecked, and seems
to be a problem regardless of using DynaActionForm or not.
So, my question is: how can I have a Boolean checkbox that defaults to
true, and yet can tell when it is unchecked, and still use
DynaActionForm?
Thanks,
katre
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