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Posted to users@tapestry.apache.org by phillip rhodes <rh...@yahoo.com> on 2004/10/05 22:15:38 UTC
Conditional component test for null object with ognl?
I have a get methods that returns a property that is
sometimes null.
Is there a way to test for this with ognl and the
Conditional component?
I am trying to avoid writing a LOT of extra boolean
"isNull" methods
Thanks.
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Re: Conditional component test for null object with ognl?
Posted by Jamie Orchard-Hays <ja...@dang.com>.
and ognl will even translate a null value to false.
<component id="isTrue" type="Conditional">
<binding condition="condition" expression="myProperty"/>
</component>
If myProperty is null, this will return false.
also, here's a link to the ognl Users Guide:
http://www.ognl.org/2.6.3/Documentation/html/UsersGuide.html
Jamie
----- Original Message -----
From: "Danny Mandel" <dm...@tolweb.org>
To: "Tapestry users" <ta...@jakarta.apache.org>
Sent: Tuesday, October 05, 2004 4:17 PM
Subject: Re: Conditional component test for null object with ognl?
> Yeah, like this:
>
> <span jwcid="@Conditional" condition="ognl:property != null">
> </span>
>
> Hope that helps,
> Danny
>
> phillip rhodes wrote:
>
> >I have a get methods that returns a property that is
> >sometimes null.
> >Is there a way to test for this with ognl and the
> >Conditional component?
> >
> >I am trying to avoid writing a LOT of extra boolean
> >"isNull" methods
> >
> >Thanks.
> >
> >
> >---------------------------------------------------------------------
> >To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
> >For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
> >
> >
>
>
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Re: Conditional component test for null object with ognl?
Posted by Danny Mandel <dm...@tolweb.org>.
Yeah, like this:
<span jwcid="@Conditional" condition="ognl:property != null">
</span>
Hope that helps,
Danny
phillip rhodes wrote:
>I have a get methods that returns a property that is
>sometimes null.
>Is there a way to test for this with ognl and the
>Conditional component?
>
>I am trying to avoid writing a LOT of extra boolean
>"isNull" methods
>
>Thanks.
>
>
>---------------------------------------------------------------------
>To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
>For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
>
>
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