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Hi am build a generic template to list my content. But the Content may be sorted on different @'s or node()'s. So want to pass the xPath in.
<xsl:variable name="sort" select="@sortBy"/>
<xsl:variable name="order" select="@order"/>
<xsl:for-each select="Content[@type=$contentType]">
<xsl:sort select="$sort" order="{$order}" data-type="text"/>
<xsl:sort select="@update" order="{$order}" data-type="text"/>
<xsl:copy-of select="."/>
</xsl:for-each>
Using a variable to drop in ascending or descending into the order="" WORKS.
Why cannot do this on the select="" ?
I hoping to make this super dynamic the select variable can be xPtah either @publish or Title/node() or any xPath.
There is no error - It just ignores the sort.
317
Variables in XSLT are not really variables, as their values cannot be changed. They resemble constants from conventional programming languages. The only way in which a variable can be changed is by declaring it inside a for-each loop, in which case its value will be updated for every iteration.
XSLT <xsl:variable> The <xsl:variable> element is used to declare a local or global variable. Note: The variable is global if it's declared as a top-level element, and local if it's declared within a template. Note: Once you have set a variable's value, you cannot change or modify that value!
The XSLT <xsl:value-of> element is used to extract the value of selected node. It puts the value of selected node as per XPath expression, as text.
XSLT's xsl:sort instruction lets you sort a group of similar elements. Attributes for this element let you add details about how you want the sort done -- for example, you can sort using alphabetic or numeric ordering, sort on multiple keys, and reverse the sort order.
This is by design. The select attribute is the only one which doesnt accept AVTs (Attribute - Value Templates).
The usual solution is to define a variable with the name of the child element that should be used as sort key. Below is a small example:
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output omit-xml-declaration="yes" indent="yes"/>
<xsl:variable name="vsortKey" select="'b'"/>
<xsl:variable name="vsortOrder" select="'descending'"/>
<xsl:template match="/*">
<xsl:for-each select="*">
<xsl:sort select="*[name() = $vsortKey]" order="{$vsortOrder}"/>
<xsl:copy-of select="."/>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
When this transformation is applied on the following XML document:
<t>
<a>
<b>2</b>
<c>4</c>
</a>
<a>
<b>5</b>
<c>6</c>
</a>
<a>
<b>1</b>
<c>7</c>
</a>
</t>
the wanted result is produced:
<a>
<b>5</b>
<c>6</c>
</a>
<a>
<b>2</b>
<c>4</c>
</a>
<a>
<b>1</b>
<c>7</c>
</a>
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