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xsl variable scope

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darkstarbg

darkstarbg

Technical User
Jun 20, 2005
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BG
Hello, I'm trying to make a DVD catalog but I'm having problems extracting data from my XML file using the id values and a variable. I'm going to post the source files first to make clear exactly what I'm trying to achieve.

XML file:

<?xml version="1.0" encoding="windows-1251"?>
<?xml-stylesheet type="text/xsl" href="catalog_director_tests2.xsl"?>
<catalog>

<dvds>
<dvd id="1">
<title>????? ????????? ?? ????????</title>
<price>24.99$</price>
<director>1</director>
<year>2001</year>
<description>National Geographic Beyond the Movie The Lord of the Rings - The Fellowship of the Ring</description>
</dvd>

<dvd id="2">
<title>????????? ?? ???????? - ????????? ?????????????? ???????</title>
<price>64.99$</price>
<director>1</director>
<year>2001</year>
<description>Platinum Series Special Extended Edition Collector's Gift Set (2001)</description>
</dvd>

<dvd id="3">
<title>????????? ?? ???????? ?? ?????? - ???????</title>
<price>13.99$</price>
<director>1</director>
<year>2001</year>
<description>Secrets of Middle-Earth: Inside Tolkien's The Fellowship of the Rings</description>
</dvd>

<dvd id="4">
<title>??????????? ?? ????? ?? ?????? - ???????</title>
<price>13.99$</price>
<director>1</director>
<year>2004</year>
<description>Secrets of Middle-Earth: Inside Tolkien's The Return of the King </description>
</dvd>


<directors>

<director id="2">
<name>George Lucas</name>
</director>

<director id="1">
<name>Peter Jackson</name>
</director>



</directors>

</catalog>



XSL file:

<?xml version="1.0" encoding="windows-1251"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="
<xsl:template match="/">


<xsl:for-each select="catalog/directors/director">

<xsl:if test="name = 'Peter Jackson'">
<xsl:variable name="dname" select="@id"/>
<xsl:value-of select="$dname"/>
</xsl:if>

</xsl:for-each>



<html>
<body>
<h2>catalog 2</h2>
<table border="1">
<tr bgcolor="#9acd32">
<th>Title</th>
<th>Price</th>
</tr>
<xsl:for-each select="catalog/dvds/dvd">
<xsl:sort select="price"/>
<tr>
<td><xsl:value-of select="title"/></td>
<td><xsl:value-of select="price"/></td>
<td><xsl:value-of select="@id"/></td>
</tr>
</xsl:for-each>
</table>


<h2>?????????</h2>
<table border="1">
<tr bgcolor="#9acd32">
<th>ID</th>
<th>???</th>
</tr>
<xsl:for-each select="catalog/directors/director">
<xsl:if test="name= 'Peter Jackson'">
<tr>
<td><xsl:value-of select="@id"/></td>
<td><xsl:value-of select="name"/></td>
</tr>
</xsl:if>
</xsl:for-each>
</table>

</body>
</html>
</xsl:template>

</xsl:stylesheet>

The problem is that I can't use the $dname variable outside of the for-each block as it loses scope. I need it so that I can associate a movie with its director. How can I make this variable global? When I declare it otside xsl:template I recieve an error message: Keyword xsl:stylesheet may not contain xsl:for-each. How can I go arround this?
 
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Not entirely sure what you mean, but generally you don't need to use variables. Also, its better practice to use templates instead of for-each:
Code: 
<?xml version="1.0"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="[URL unfurl="true"]http://www.w3.org/1999/XSL/Transform">[/URL]

  <xsl:template match="/">
    <html>
      <body>
        <h2>catalog 2</h2>
        <table border="1">
          <tr bgcolor="#9acd32">
            <th>Title</th>
            <th>Director</th>
            <th>Price</th>
          </tr>
          <xsl:apply-templates select="catalog/dvds/dvd">
            <xsl:sort select="price"/>
          </xsl:apply-templates>
        </table>
      </body>
    </html>
  </xsl:template>

  <xsl:template match="dvd">
    <tr>
      <td><xsl:value-of select="title"/></td>
      <td><xsl:value-of select="../../directors/director[@id = current()/director]/name"/></td>
      <td><xsl:value-of select="price"/></td>
    </tr>
  </xsl:template>

</xsl:stylesheet>

Jon

"Asteroids do not concern me, Admiral. I want that ship, not excuses.
 
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Thank you for your answer. This works for the sort by price xsl file but I also need to extract movie titles by the director's name. In this case I have to use for-each but instead of xsl:sort because I don't need to sort the results. That is why I used a variable in my example. Can I achieve this without useing a varible. For example can I extract only the movies directed by Peter Jackson without using a variable?
 
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I'd probably do something like this:
Code: 
<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="[URL unfurl="true"]http://www.w3.org/1999/XSL/Transform">[/URL]
  <xsl:param name="director" select="'Peter Jackson'"/>
  <xsl:template match="/">
    <html>
      <body>
        <h2>catalog 2</h2>
        <table border="1">
          <tr bgcolor="#9acd32">
            <th>Title</th>
            <th>Director</th>
            <th>Price</th>
          </tr>
          <xsl:apply-templates select="catalog/dvds/dvd" mode="all">
            <xsl:sort select="price"/>
          </xsl:apply-templates>
        </table>
        <h2>
          <xsl:text>Films by </xsl:text>
          <xsl:value-of select="$director"/>
        </h2>
        <table border="1">
          <tr bgcolor="#9acd32">
            <th>Title</th>
            <th>Price</th>
          </tr>
          <xsl:apply-templates select="catalog/dvds/dvd[director = ../../directors/director[name = $director]/@id]" mode="byDirector">
            <xsl:sort select="price"/>
          </xsl:apply-templates>
        </table>
      </body>
    </html>
  </xsl:template>
  <xsl:template match="dvd" mode="all">
    <tr>
      <td>
        <xsl:value-of select="title"/>
      </td>
      <td>
        <xsl:value-of select="../../directors/director[@id = current()/director]/name"/>
      </td>
      <td>
        <xsl:value-of select="price"/>
      </td>
    </tr>
  </xsl:template>
  <xsl:template match="dvd" mode="byDirector">
    <tr>
      <td>
        <xsl:value-of select="title"/>
      </td>
      <td>
        <xsl:value-of select="price"/>
      </td>
    </tr>
  </xsl:template>
</xsl:stylesheet>

Jon

"Asteroids do not concern me, Admiral. I want that ship, not excuses.
 
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I described the Scope of variables in this thread:
thread426-1063382

Visit My Site
PROGRAMMER: (n) Red-eyed, mumbling mammal capable of conversing with inanimate objects.
 
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Thank you very much for your answers! :) You've been very helpful!
 
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