change output markup conditionally based on page data

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Alex Burr 77 posts 128 karma points

Mar 10, 2011 @ 15:13
0

Change output markup conditionally based on page data

XSLT
Hi everyone!

I'm having a brain fart moment. I've done things like this in the past but for some reason I can't wrap my head around it today.

Here's what I'm doing: Pages include an optional property called pageSubheading, which is a Textstring. At the top of each page, I display the page title in an <h1> tag, but if they also include a pageSubheading, I will output that in an <h2> immediately below and wrap them both in an <hgroup> tag. Here's my XSL:
```
<xsl:output method="xml" omit-xml-declaration="yes"/>

<xsl:param name="currentPage"/>

<xsl:template match="/">

    <xsl:choose>
        <xsl:when test="string($currentPage/data[@alias='pageSubheading'])!=''">
            <hgroup>
                <h1><xsl:value-of select="$currentPage/@nodeName" /></h1>
                <h2><xsl:value-of select="$currentPage/data[@alias='pageSubheading']" /></h2>
            </hgroup>
        </xsl:when>
        <xsl:otherwise>
            <h1><xsl:value-of select="$currentPage/@nodeName" /></h1>
        </xsl:otherwise>
    </xsl:choose>

</xsl:template>
```
What am I missing here? Thanks in advance.
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kows 81 posts 151 karma points c-trib

Mar 10, 2011 @ 15:24

0

W3C: The <xsl:when> element is used in conjunction with <xsl:choose> and <xsl:otherwise> to express multiple conditional tests.

Don't you need xsl:if ?

edit:

I would try to solve this by entering simple templates to the when/otherwise (just a letter),

and add each statement back line by line to see what goes wrong. Does it display any line at all or just error?

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Alex Burr 77 posts 128 karma points

Mar 10, 2011 @ 15:47

I chose to use <xsl:when> since there is no such thing as "else" in XSL.

To do some debugging, I tried this. I tested on a page that *had* some text in pageSubheading.

<xsl:choose>
        <xsl:when test="string($currentPage/data[@alias='pageSubheading'])!=''">
            <hgroup>
                <h1><!-- <xsl:value-of select="$currentPage/@nodeName" /> --> Pass</h1>
                <h2><xsl:value-of select="$currentPage/data[@alias='pageSubheading']" /></h2>
            </hgroup>
        </xsl:when>
        <xsl:otherwise>           
            <h1><!-- <xsl:value-of select="$currentPage/@nodeName" /> --> Fail</h1>
        </xsl:otherwise>
    </xsl:choose>

The output was <h1> Fail</h1>, which was surprising.

Then I modified the XSL to this to try again:

<xsl:choose>
        <xsl:when test="string($currentPage/data[@alias='pageSubheading'])!='False'">
            <hgroup>
                <h1><!-- <xsl:value-of select="$currentPage/@nodeName" /> --> Pass</h1>
                <h2><xsl:value-of select="$currentPage/data[@alias='pageSubheading']" /></h2>
            </hgroup>
        </xsl:when>
        <xsl:otherwise>           
            <h1><!-- <xsl:value-of select="$currentPage/@nodeName" /> --> Fail</h1>
        </xsl:otherwise>
    </xsl:choose>

And this time the output was <hgroup><h1> Fail</h1><h2></h2></hgroup>. There was no output between the <h2> tags.

So it seems like my conditional <xsl:when> statement is wrong? Like I said, I've done this type of thing before... in fact I copied the XSL directly from an earlier project that had done something similar. So I guess I'm confused as to how to reference this properly.

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kows 81 posts 151 karma points c-trib

Mar 10, 2011 @ 16:22

0

<hgroup><h1> Fail</h1><h2></h2></hgroup>

how's that possible, "Fail" is in your otherwise tag. while the structure is in your when.

Could it be that you must drop $currentPage(/) since you're in a template?

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Alex Burr 77 posts 128 karma points

Mar 10, 2011 @ 16:31

That's what I'm saying; I appear to be getting the opposite result? Now I've tried this...

<xsl:when test="string($currentPage/data[@alias='pageSubheading'])=''">
    <hgroup>
        <h1><xsl:value-of select="$currentPage/@nodeName" /></h1>
        <h2><xsl:value-of select="$currentPage/data[@alias='pageSubheading']" /> Pass</h2>
        </hgroup>
</xsl:when>

And what I get is <hgroup><h1>(PAGE TITLE)</h1><h2> Pass</h2></hgroup>

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kows 81 posts 151 karma points c-trib

Mar 10, 2011 @ 16:43

0

could you try testing with $currentPage/pageSubheading ?

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Alex Burr 77 posts 128 karma points

Mar 10, 2011 @ 16:48

I've changed to this and it's now working:

<xsl:choose>
   <xsl:when test="$currentPage/pageSubheading!=''">
        <hgroup>
         <h1><xsl:value-of select="$currentPage/@nodeName" /></h1>
            <h2><xsl:value-of select="$currentPage/pageSubheading" /></h2>
       </hgroup>
    </xsl:when>
  <xsl:otherwise>            
       <h1><xsl:value-of select="$currentPage/@nodeName" /></h1>
    </xsl:otherwise>
</xsl:choose>

I'm a little confused as to why that worked, but the end result is that it worked.

I really appreciate the help. Now on to figuring out my navigation/breadcrumb problems in a diffrerent topic!

Thanks again.

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Chriztian Steinmeier 2798 posts 8788 karma points MVP 7x admin c-trib

Mar 10, 2011 @ 16:58

0

Hi Alex,

This is because your initial code was using the old XML Schema (and would work with a site using that), whereas the working code use the new (as of Umbraco 4.5) XML Schema, which is much better to work with.

/Chriztian

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Alex Burr 77 posts 128 karma points

Mar 10, 2011 @ 17:01

0

Ah, yes, I had built the old code on a site using an earlier version of Umbraco. The site I'm building now is on 4.5.0.

Thanks!

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