[opencms-dev] Check if element exists

[Mario Jäger]

Hi Yves,

Thank you for the control code. The result of your three calls in my 
environment with your example is "true, true, true".

Please, check if your current context locale matches the locale in the 
free page. Your current context locale should be "en" to match the 
locale in your free page. For another locale than "en" the element 
"rcontent" does not exist and the result of the three calls is "false, 
true, false". With the following line you can check your current context 
locale:

${cms:vfs(pageContext).context.locale}

Kind Regards,
Mario.

Am 29.03.2011 22:40, schrieb Yves Glodt:
> Here is the controlcode:
>
> <?xml version="1.0" encoding="UTF-8"?>
>
> <pages xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xsi:noNamespaceSchemaLocation="http://www.opencms.org/dtd/6.0/xmlpage.xsd">
> <page language="en">
> <element name="lcontent">
> <links/>
> <content/>
> </element>
> <element name="mcontent">
> <links/>
> <content/>
> </element>
> <element name="rcontent">
> <links />
> <content />
> </element>
> </page>
> </pages>
>
>
>
>
> On 29 March 2011 17:48, Mario Jäger <m.jaeger at alkacon.com
> <mailto:m.jaeger at alkacon.com>> wrote:
>  >
>  > Hi Yves,
>  >
>  > Please, show me the control code of your "page with free text". The
>  > structure is important for me, not the content of the elements. Shall
>  > mean, that you can remove the content of the elements, of course.
>  >
>  > Kind Regards,
>  > Mario.
>  >
>  > Am 29.03.2011 16:45, schrieb Yves Glodt:
>  > > Hi Mario,
>  > >
>  > > in fact the element exists in the page, so yes, I wonder why isEmpty
>  > > returns "true".
>  > >
>  > > And I also wonder why the 2 other calls return false... :-)
>  > >
>  > > Is there another way to check whether an element exists in a page?
>  > >
>  > > The example here does also not work as I expect:
>  > >
> http://opencms-wiki.org/EL_functions_provided_by_OpenCMS_taglib#XML_content
>  > >
>  > > Maybe I expect something impossible. As said, my page is a simple "page
>  > > with free text"
>  > >
>  > >
>  > > On 29 March 2011 16:13, Mario Jäger <m.jaeger at alkacon.com
> <mailto:m.jaeger at alkacon.com>
>  > > <mailto:m.jaeger at alkacon.com <mailto:m.jaeger at alkacon.com>>> wrote:
>  > >
>  > >     Hi Yves,
>  > >
>  > >     I assume, that you are wondering over the (second) return value
> "true",
>  > >     because the element does not exist in your xml content. With
> the three
>  > >     function calls you use, methods in
>  > >     org.opencms.jsp.util.CmsJspContentAccessValueWrapper.java are
> used. The
>  > >     second call uses the method getIsEmpty() in that class. And
> that method
>  > >     also returns true for non existing values. The description for that
>  > >     method says: Returns true in case the value is empty, that is
> either
>  > >     null or an empty String.
>  > >
>  > >     Kind Regards,
>  > >     Mario.
>  > >
>  > >     Am 29.03.2011 14:58, schrieb Yves Glodt:
>  > > > Hello,
>  > > >
>  > > > I try to check if an element exists in a "page with free text",
>  > >     and if
>  > > > yes, include it.
>  > > >
>  > > > The check I do like this (in a c:if), but these 3 calls return
>  > > "false,
>  > > > true, false" (in order of appearance)
>  > > >
>  > >
> ${cms:vfs(pageContext).xml[cms:vfs(pageContext).context.uri].hasValue['rcontent']}
>  > > >
>  > >
> ${cms:vfs(pageContext).xml[cms:vfs(pageContext).context.uri].value['rcontent'].isEmpty}
>  > > >
>  > >
> ${cms:vfs(pageContext).xml[cms:vfs(pageContext).context.uri].value['rcontent'].exists}
>  > > >
>  > > > What is wrong about this?
>  > > >
>  > > > Best regards,
>  > > > Yves
>  > > >
>  > > >
>  > > >
>  > > >
>  > > >
>  > > >
>  > > > _______________________________________________
>  > > > This mail is sent to you from the opencms-dev mailing list
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>  > >     please visit
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>  > >
>  > >
>  > >     --
>  > >     -------------------
>  > >     Mario Jäger
>  > >
>  > >     Visit OpenCms Days 2011 Conference and Expo
>  > >     May 9 to May 10 2011 in Cologne, Germany
>  > > http://www.opencms-days.org
>  > >
>  > >     Alkacon Software GmbH  - The OpenCms Experts
>  > > http://www.alkacon.com - http://www.opencms.org
>  > >
>  > >
>  > >
>  > >
>  > >
>  > > _______________________________________________
>  > > This mail is sent to you from the opencms-dev mailing list
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> please visit
>  > > http://lists.opencms.org/mailman/listinfo/opencms-dev
>  >
>  >
>  > --
>  > -------------------
>  > Mario Jäger
>  >
>  > Visit OpenCms Days 2011 Conference and Expo
>  > May 9 to May 10 2011 in Cologne, Germany
>  > http://www.opencms-days.org
>  >
>  > Alkacon Software GmbH  - The OpenCms Experts
>  > http://www.alkacon.com - http://www.opencms.org
>  >
>  > _______________________________________________
>  > This mail is sent to you from the opencms-dev mailing list
>  > To change your list options, or to unsubscribe from the list, please
> visit
>  > http://lists.opencms.org/mailman/listinfo/opencms-dev
>
>
>
>
> _______________________________________________
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-- 
-------------------
Mario Jäger

Visit OpenCms Days 2011 Conference and Expo
May 9 to May 10 2011 in Cologne, Germany
http://www.opencms-days.org

Alkacon Software GmbH  - The OpenCms Experts
http://www.alkacon.com - http://www.opencms.org