Re: Handling missing node values with NodeModel

Awesome..... that worked perfect... thanks Daniel !!!!

On 21/06/2011 15:29, Daniel Dekany wrote:
> I recommend reading this:
>
>    http://freemarker.org/docs/xgui_imperative_learn.html
>
> It answers this question among others. Anyway, you could do it like
> this:
>
>    ${.vars["com.acme.Travel"].checkIn[0]!}
>
> The relevant change I did here is the adding of [0]; the others are
> just aesthetical. You see, the result of the XPath query exists even
> if it's an empty node list, so what you want to know if it has a 1st
> element.
>
>
> Tuesday, June 21, 2011, 3:26:15 PM, Tom Fennelly wrote:
>
>> Hi.
>>
>> I'm using a NodeModel and was wondering how missing nodes can be
>> handled?  I'm looking for the equivalent of the
>> unsafe_expr!default_expr notation
>> (http://freemarker.sourceforge.net/docs/dgui_template_exp.html#dgui_template_exp_missing),
>> but something that works for NodeModels (the default did not work for me).
>>
>> BTW.. the template's in question use the .vars syntax in the
>> expressions.  So, when I do the following I get an exception -
>> ${.vars["com.acme.Travel"]["checkIn"]!""}.  The exception is...
>>      Expecting a string, date or number here, Expression
>> .vars["com.acme.Travel"]["checkIn"]!"" is instead a freemarker.ext.dom.NodeListModel
>>      The problematic instruction:
>>      ----------
>>      ==>  ${.vars["com.acme.Travel"]["checkIn"]!""} [on line 3,
>> column 19 in free-marker-template]
>>      ----------
>>
>>      Java backtrace for programmers:
>>      ----------
>>      freemarker.core.NonStringException: Error on line 3, column 21 in free-marker-template
>>
>> Thanks in advance.
>>
>> T.

------------------------------------------------------------------------------
EditLive Enterprise is the world's most technically advanced content
authoring tool. Experience the power of Track Changes, Inline Image
Editing and ensure content is compliant with Accessibility Checking.
http://p.sf.net/sfu/ephox-dev2dev