Add an attribute according to value

eranben · September 26th, 2011, 12:00 PM

Hi,
I must add an attribute to an already existing node (with children) according to one of the other attributes' value:

<node attr1="1"><child/></node>

if test @attr1=1 add attr2="y"
else add attr2="n"

result:
<node attr1="1" attr2="y"><child/></node>

the problem is that I can't add attributes due to node's child:

Code:

<xsl:choose>
			<xsl:when test="@attr1='1'">
			  <xsl:attribute name="attr2">y</xsl:attribute>
			</xsl:when>
			<xsl:otherwise>
				<xsl:attribute name="atte2">n</xsl:attribute>
			</xsl:otherwise>
		</xsl:choose>

reports an error:
xsl:attribute: Cannot add attributes to an element if children have been already added to the element.

and copying makes a mess of things:

Code:

<xsl:choose>
			<xsl:when test="@attr1='1'"><xsl:copy>
			<xsl:copy-of select="@*"/>
				<xsl:attribute name="attr2">y</xsl:attribute>
			<xsl:copy-of select="*"/>
		</xsl:copy></xsl:when>
			<xsl:otherwise><XSL-copy>
			<xsl:copy-of select="@*"/>
				<xsl:attribute name="attr2">n</xsl:attribute>
			<xsl:copy-of select="*"/>
		</xsl:copy></xsl:otherwise>
		</xsl:choose>

this generates:
<node attr1="1"><child/><node attr1="1" attr2="y"></node></node>

What do I do???

thank you,
Eran

Martin Honnen · September 26th, 2011, 12:06 PM

Well you need to change your code to ensure that you first create all attribute nodes of the "node" element, then all children.
It is hard to tell more as you have not show any context (e.g. template match).

eranben · September 26th, 2011, 07:31 PM

Thank you Martin.

I'm very new to XSL, in fact this is the first time I've touched it.
I inherited some infrastructure and am fumbling with it.

I'll look into templates and see how I can use then to assist me.

If you have any useful advice I'll be happy to read it.

Regards,
Eran