Re: Problem setting nested bean properties on ActionForms

[Ricardo Gladwell]

Hi Niall,
My form-bean definition is included below:
<form-bean
name="configureForm"
type="org.apache.struts.action.DynaActionForm">
        <form-property
                name="title"
                type="java.lang.String"
        />
        <form-property
                name="webdav.url"
                type="java.lang.String"
        />
</form-bean>
--
Ricardo Gladwell
Niall Pemberton wrote:
If you have
  <html:text property="webdav.url" value="${config.webdav.url}"/>
in your jsp, then Struts (using BeanUtils) will try and do a get("webdav")
on your DynaActionForm so that it can then call set("url") on the bean
returned from the get.
So when you say "I checked and the property setter method for the
DynaActionForm in the example I cited is being called and the 'webdav.url'
string is being passed as the property name" - this doesn't seem right to
me. If it is being called then its not the Struts form population mechanism
thats doing it.
I'm guessing that in your struts config for the DynaActionForm definition
you have a property called "webdav.url" - if so then maybe its the form
initializtion thats setting "webdav.url" to null. If this is the case then
its never going to work this way. You need a "webdav" property that is some
kind of bean and then a "url" property in that bean and you somehow need to
have that bean set up in your form before the population is done.
If I'm completely off base here then you need to post more information - how
about posting the form definition from your struts-config.xml.
Niall
----- Original Message ----- 
From: "Ricardo Gladwell" <[EMAIL PROTECTED]>
To: "Jakarta Struts Users" <[EMAIL PROTECTED]>
Sent: Friday, August 06, 2004 2:02 PM
Subject: Problem setting nested bean properties on ActionForms


Hi All,
I'm having some problems with nested properties in Strust. Struts seems
to loose property values when specifying nested bean properties in
an action form. For example, the following fragment is an example of
attempting to set a value in a view JSP:
<html:text property="webdav.url" value="${config.webdav.url}"/>
When Struts attempts to set the webdav.url nested bean property for,
example, a DynaActionForm the value is passed as null to the action form
setter method.
In the documentation it clearly states that "the property attribute for
the Struts-HTML tags accept simple, nested, and indexed expressions":

http://struts.apache.org/api/org/apache/struts/taglib/html/package-summary.html#package_description
I checked and the property setter method for the DynaActionForm in the
example I cited is being called and the 'webdav.url' string is being
passed as the property name but the property value passed is 'null'
despite the fact that I have entered a value. When I switch to using
standard, non-nested property name values in the html:text tag the
values are set correctly.
Is this proper behaviour for Struts or is it some kind of bug?
Kind regards...
-- Ricardo
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