Test if an XML node is blank and if so hard code href attribute value

I have XML that gets values from user input. I want to test to see if the url node is blank.
If it is blank

then I want to insert a value into a href

If it is not blank

I want to use the node's value in the href

I have the following code but it is not working. What am I doing wrong?

  <xsl:choose>
    <xsl:when test="(url = '')">
      <a href="https://example.com">
    </xsl:when>
    <xsl:otherwise>
      <a href="{url}">
    </xsl:otherwise>
  </xsl:choose>
    
    <h3><xsl:value-of select="level"></h3>
    <h4><xsl:value-of select="name"></h4>
    <h5><xsl:value-of select="location"></h5>
  </a>

Here is an example of my XML


<unique-component-name>
  
  <card>
    
    <url></url>
    <level>Level Value</level>
    <name>Name Value</name>
    <location>Location Value</name>
    
  </card>
  
</unique-component-name>

If the user leaves the url blank I want the href to link to "https://example.com"

If the user provides a url I want the href to link to the user given url.

CodePudding user response：

I have the following code but it is not working. What am I doing wrong?

'Not working" is not a good description of a problem. You need to tell us how it fails. At this point, all we can say is that your XSLT code is not well-formed XML. You haven't closed the a elements. Instead of:

  <xsl:choose>
    <xsl:when test="(url = '')">
      <a href="https://example.com">
    </xsl:when>
    <xsl:otherwise>
      <a href="{url}">
    </xsl:otherwise>
  </xsl:choose>

it needs to be:

  <xsl:choose>
    <xsl:when test="(url = '')">
      <a href="https://example.com"/>
    </xsl:when>
    <xsl:otherwise>
      <a href="{url}"/>
    </xsl:otherwise>
  </xsl:choose>

And of course you must get rid of the orphaned </a> closing tag at the end.

Note also that the input XML is also not well-formed:

<location>Location Value</name>

CodePudding user response：

This would be a way to build an a element and conditionally set href attribute

<xsl:element name="a">
  <xsl:choose>
    <xsl:when test="(url = '')">
        <xsl:attribute name="href">https://example.com</xsl:attribute>
    </xsl:when>
    <xsl:otherwise>
      <xsl:attribute name="href"><xsl:value-of select="url"/></xsl:attribute>
    </xsl:otherwise>
  </xsl:choose>
  <h3><xsl:value-of select="level"/></h3>
  <h4><xsl:value-of select="name"/></h4>
  <h5><xsl:value-of select="location"/></h5>
</xsl:element>