Forum Discussion

Mackinaw's avatar
Mackinaw
Adept
13 years ago

handling empty tags in freemarker

Hi,

I'm parsing the label attribute to a message and am encountering an error when the field is empty.

 

My code works when the rest response looks like this:

<response status="success">
<labels>
<label type="label" href="/labels/id/4">
<id type="int">4</id>
<text type="string">This Message's Label</text>
</label>
</labels>
</response>
where it's breakingis on a response such as this:
<response status="success">
<labels></labels>
</response>
My code looks like this:

<#assign board=rest("${selectedBlog.@href}/topics")>
<#list board.node_message_context.message.@href as id>
<#assign boardMessage=rest("${id}?restapi.response_style=view")>

<#assign labels=restadmin("/messages/id/${boardMessage.message.id}/labels").value!"">

${labels.text}

 

If the label is present, this works great.  If it is not, I get the following error:

Expecting a string, date or number here, Expression labels.text is instead a freemarker.ext.dom.NodeListModel

 

Can someone suggest how can I check for this situation (empty label response) and handle it?

 

Thank you!

 

Paul

  • Claudius's avatar
    Claudius
    Boss
    12 years ago

    Hi Paul,

    I'm quite late to the party here, but my answer just for reference:

    You might want to check if the variable is set:

    <#if labels.text?? && labels.text?has_content>
    ${labels.text}
</#if>