Thanks for the tip, now it worked :)
Like you said, I had to assign a listener and transfer the code to the java
page. It worked but I understand there is a problem with ognl; theoretically
the previous approach should also work. Thanks a lot anyway :)
On 10/10/07, andyhot <[EMAIL PROTECTED]> wrote:
>
> Not sure why this fails - I'd also try
>
> parameters="ognl:{selectedCountryId, selectedLocationId == -1 ?
> otherCityId : selectedLocationId,
> checkIn == null ? null : checkIn.time, checkOut == null ? null :
> checkOut.time, adultsPerRoom}"
>
> but I'd really go with simplifying the ognl expression of this direct
> link, i.e.
> moving the code into the java.
>
> PS. listener="ognl:listeners.goToLocationSearch" should be updated to
> listener="listener:goToLocationSearch" (faster & cleaner)
>
> Nikolaos Konstantinou wrote:
> > I 'm having this peculiar problem with the page I'm trying to create
> (I'm
> > using Tapestry 4.1.3. When the page loads, I get a Tapestry Exception
> > Unable to read OGNL expression '<parsed OGNL expression>' of
> > [EMAIL PROTECTED]: source is null for getProperty(null,
> > "selectedCountryId") [context:/WEB-INF/Home.xhtml, line 130]
> >
> > The "mystery" is that the error is traced at the DirectLink component;
> > Tapestry does not have any problem with the Hidden component, arising
> > suspicions that the problem is not actually that selectedCountryId is
> null
> > (it should have a problem with the Hidden component) but that there's
> > something I'm not doing right with the DirectLink component. What could
> be
> > the case?
> >
> > Line 96:
> > <form action="#" jwcid="quoteForm">
> > <input type="hidden" jwcid="@Hidden"
> > value="ognl:selectedCountryId"/>
> >
> > ...
> > Line 130:
> > <a href="LocationSearch.xhtml"
> > id="pickdestsearchlink"
> > onclick='
> document.getElementById
> > ("pickdestsearch").checked="checked"'
> > jwcid="@DirectLink"
> > listener="ognl:
> > listeners.goToLocationSearch"
> > parameters="ognl:new
> > java.lang.Object[] {selectedCountryId, selectedLocationId == -1 ?
> > otherCityId : selectedLocationId, checkIn == null ? null : checkIn.time,
> > checkOut == null ? null : checkOut.time, adultsPerRoom}"
> >
> > >Search for a destination<br/>
> > using keywords</a>
> >
> >
> > <http://www.cn.ntua.gr/%7Enkons>
> >
> >
>
> --
> Andreas Andreou - [EMAIL PROTECTED] - http://andyhot.di.uoa.gr
> Tapestry / Tacos developer
> Open Source / JEE Consulting
>
>
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>
--
Nikolaos Konstantinou
PhD Student - Research Assistant
Homepage: http://www.cn.ntua.gr/~nkons
