XSLT problem

[AndreasAndersson]

Hi!

I'm trying to design an XSLT in order to transform an XML document into another XML document.

The source XML looks something like this:

<?xml version="1.0" encoding="UTF-8"?>
<Orders>
<Order>
<OrderHeader>
<sCustomerNo>116442</sCustomerNo>
<sOrderNo>8245673</sOrderNo>
</OrderHeader>
<OrderRows>
<OrderRow>
<sOrderLineNo>1</sOrderLineNo>
<sArticleNo>102448</sArticleNo>
<iQuantity>3</iQuantity>
</OrderRow>
<OrderRow>
<sOrderLineNo>2</sOrderLineNo>
<sArticleNo>102448</sArticleNo>
<iQuantity>4</iQuantity>
</OrderRow>
</OrderRows>
</Order>
<Order>
<OrderHeader>
<sCustomerNo>116448</sCustomerNo>
<sOrderNo>8245677</sOrderNo>
</OrderHeader>
<OrderRows>
<OrderRow>
<sOrderLineNo>1</sOrderLineNo>
<sArticleNo>102448</sArticleNo>
<iQuantity>7</iQuantity>
</OrderRow>
</OrderRows>
</Order>
</Orders>
 

And I want the transformed XML to look like this:

<?xml version="1.0" encoding="utf-8"?>
<Orders>
<Order>
<OrderNumber>8245673</OrderNumber>
<Customer>116442</Customer>
<OrderLine>
<ArticleNumber>102448</ArticleNumber>
<Quantity>7</Quantity>
</OrderLine>
</Order>
<Order>
<OrderNumber>8245677</OrderNumber>
<Customer>116448</Customer>
<OrderLine>
<ArticleNumber>102448</ArticleNumber>
<Quantity>7</Quantity>
</OrderLine>
</Order>
</Orders>
 

The challenge is to group all orderlines with the same article number and summarizing their quantities.

In order to acheive this I´ve found something called the Muenchian method: http://www.jenitennison.com/xslt/gro...muenchian.html

<xsl:key name="orderrows-by-articleno" match="OrderRows/OrderRow" use="sArticleNo" />
...
<xsl:for-each select="OrderRows/OrderRow[count(. | key(''''orderrows-by-articleno'''', sArticleNo)[1]) = 1]">
<xsl:variable name="sArticleNo">
<xsl:value-of select="sArticleNo"/>
</xsl:variable>
<OrderLine>
<ArticleNumber><xsl:value-of select="sArticleNo" /></ArticleNumber>
<Quantity><xsl:value-of select="sum(../../OrderRows/OrderRow[sArticleNo = $sArticleNo]/iQuantity)"/></Quantity>
</OrderLine>
</xsl:for-each>
 

But since the "orderrows-by-articleno"-key matches for all OrderRows/OrderRow in the entiry document and not per Order, I get this result:

<?xml version="1.0" encoding="utf-8"?>
<Orders>
<Order>
<OrderNumber>8245673</OrderNumber>
<Customer>116442</Customer>
<OrderLine>
<ArticleNumber>102448</ArticleNumber>
<Quantity>7</Quantity>
</OrderLine>
</Order>
<Order>
<OrderNumber>8245677</OrderNumber>
<Customer>116448</Customer>
</Order>
</Orders>
 

Anyone got any idea how to make this grouping per order?

[jkmyoung]

<xsl:key name="orderrows-by-articleno" match="OrderRows/OrderRow" use="concat(sArticleNo,generate-id(..))" />

Note this should really be generate-id(../..) to group on Order as well, but I've cheated a little and assumed that OrderRows only appear once per Order.

For-each becomes

<xsl:for-each select="OrderRows/OrderRow[count(. | key('orderrows-by-articleno', concat(sArticleNo,generate-id(..)))[1]) = 1]">

Also, why not use the key in summing? You've already created it.

<xsl:value-of select="sum(key('orderrows-by-articleno', concat(sArticleNo,generate-id(..)))/iQuantity)"/>