T5: using an expression in t:if

[Angelo Chen <an...@yahoo.com.hk>]

Hi,

I'd like to display a count if count is greater than 200, but following will
trigger error:
Could not convert 'currentPage.count > 0' into a component parameter binding

<t:if test= 'currentPage.count > 200'>
  count : ${currentPage.count}
</t:if>

any idea? thanks,

Angelo
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Re: T5: using an expression in t:if

[Francois Armand <fa...@linagora.com>]

Angelo Chen wrote:
> Hi,
>
> I'd like to display a count if count is greater than 200, but following will
> trigger error:
> Could not convert 'currentPage.count > 0' into a component parameter binding
>
> <t:if test= 'currentPage.count > 200'>
>   count : ${currentPage.count}
> </t:if>
>   

This not supported in the T5.0-final version. You have three possibilites :
- do your logic in the java where it belongs ;
- use the Chenillekit  OGNL binding to gain access to OGNL syntax and 
possibilities ;
- wait for T5.1, one of the most visible upgrade being in the expression 
language.

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Francois Armand
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Groupe Linagora - http://www.linagora.com
Tél.: +33 (0)1 58 18 68 28
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Re: T5: using an expression in t:if

["Thiago H. de Paula Figueiredo" <th...@gmail.com>]

On Tue, Feb 10, 2009 at 9:14 AM, Angelo Chen <an...@yahoo.com.hk> wrote:

> <t:if test= 'currentPage.count > 0'>

With the prop binding (the default), you can't use any expression like
that, just properties.
There are two ways to do what you want:

1) Create a getter in your page class (that's what I'd do):
public boolean isHasPages() {
    return pageCount > 200;
}

<t:if test= 'hasPages'>...</t:if>

2) Use the OGNL biding from
http://www.chenillekit.org/chenillekit-tapestry/ognlbinding.html.

-- 
Thiago

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