[daisy] Re: daisy Digest, Vol 25, Issue 24

[Paul Focke]

Hello,

Diane Soini wrote:
> So I muddled my way through and actually created a document type-specific
> style sheet with a query in it. Several issues I cannot figure out:
>
> 1) My query is looking up documents based on the document type. I would
> like to also look up documents based on a field, but have it match the
> field with the document. Something like:
> <p:query>select name, $Vertical where documentType='CaseStudy' and
> $Vertical = <the same value of the current page doing this query></p:query>
>
> I am not sure how to do that.
You can make use of the ContextDoc() function in the query language. If 
you are running the query inside a document or a custom publisher 
request you'll have access to this.

select name, $Vertical where documentType='CaseStudy' and $Vertical = ContextDoc($Vertical)


>
> 2) My $Vertical field is a multi-value field. When I loop through the
> results, I can't get the field out.
> <h3>Case Studies</h3>
> <ul>
> <xsl:for-each
> select="../p:group[@id='casestudies']/d:searchResult/d:rows/d:row">
> <li><a
> href="{$documentBasePath}{@documentId}?branch={@branchId}&amp;language={@languageId}">
> <xsl:value-of select="d:value[1]"/>
> [[HOW DO I GET THE FIELD OUT?? d:value = d:value[1], d:value[2] doesn't
> give me anything, . gives me the field and the name. I can't get the field
> out by itself]]
> </a>
> </li>
> </xsl:for-each>
> </ul>
Aha ! A multivalue field. The values should then be stored in a 
d:multiValue tag
So your xsl might want to look like this
<ul>
<xsl:apply-templates 
select="../p:group[@id='casestudies']/d:searchResult/d:rows/d:row"/>
</ul>
<xsl:template match="d:row">
<li>
<a 
href="{$documentBasePath}{@documentId}?branch={@branchId}&amp;language={@languageId}">
<!-- You might want to filter this to only catch d:value d:multiValue 
d:xmlValue d:linkValue and/or d:hierarchyValue -->
<xsl:apply-templates select="./*"/>
</a>
</li>
</xsl:template>



<xsl:template match="d:value">
<xsl:value-of select="."/>
</xsl:template>

<xsl:template match="d:multiValue">
<xsl:for-each select="*">
<xsl:if test="position() > 1">, </xsl:if>
<xsl:apply-templates select="."/>
</xsl:for-each>
</xsl:template>

A good resource to look at when you are doing query styling is in the 
default skin xslt/searchresults.xsl
>
> 3) To make matters worse, I can't get the individual values out of my
> multi-value field. It's just a lump of one value all mushed together. How
> do I get the values out as an array, and how do I loop through the array?
> Or do multi-values not really work?
Answer is in the previous response
>
> 4) I'm obviously using the query to display a list. However, I don't want
> to show the list or the heading if there are no matches with the verticals.
> How do I determine that there are no relevant results?
> Since my current query is this:
> <p:query>select name, $Vertical where documentType='CaseStudy'</p:query>
> I get all the documents even if they are the wrong ones. I can't figure out
> how to set a variable or determine somehow whether the list has any
> relevant case studies until too late in the HTML. I don't want to output
> anything if none of the case studies match.
>
>
Well if your query contains a filter on $Vertical (see answer1) then 
you'll only get the case studies you want. In order to know whether to 
show the heading or not check the row count.

HTH,

Paul