XSL Looping Query for Short Text PO Attachments

Question

I am using XML Publisher to revise a custom Purchase Order.
This is a sample skeleton layout of the XML data:
<PO_DATA>
<LINES>
     <LINES_ROW>
          <LINE_NUM>1</LINE_NUM>
          <ITEM_DESCRIPTION>blah1.</ITEM_DESCRIPTION>
          <PO_HEADER_ID>535404</PO_HEADER_ID>
          <PO_LINE_ID>879135</PO_LINE_ID>
          <LINE_SHORT_TEXT>
               <LINE_SHORT_TEXT_ROW>
                    <PO_LINE_ID>879135</PO_LINE_ID>
                    <SHORT_TEXT>Attachment for line 1</SHORT_TEXT>
               </LINE_SHORT_TEXT_ROW>
               <LINE_SHORT_TEXT_ROW>
                    <PO_LINE_ID>879135</PO_LINE_ID>
                    <SHORT_TEXT>Another Attachment for line 1</SHORT_TEXT>
               </LINE_SHORT_TEXT_ROW>
               <LINE_SHORT_TEXT_ROW>
                    <PO_LINE_ID>879135</PO_LINE_ID>
                    <SHORT_TEXT>Header Attachment</SHORT_TEXT>
               </LINE_SHORT_TEXT_ROW>
          </LINE_SHORT_TEXT>
     </LINES_ROW>
     <LINES_ROW>
          <LINE_NUM>2</LINE_NUM>
          <ITEM_DESCRIPTION>Blah2</ITEM_DESCRIPTION>
          <PO_HEADER_ID>535404</PO_HEADER_ID>
          <PO_LINE_ID>879136</PO_LINE_ID>
          <LINE_SHORT_TEXT>
               <LINE_SHORT_TEXT_ROW>
                    <PO_LINE_ID>879136</PO_LINE_ID>
                    <SHORT_TEXT>Attachment for line 2</SHORT_TEXT>
               </LINE_SHORT_TEXT_ROW>
               <LINE_SHORT_TEXT_ROW>
                    <PO_LINE_ID>879136</PO_LINE_ID>
                    <SHORT_TEXT>Header Attachment</SHORT_TEXT>
               </LINE_SHORT_TEXT_ROW>
          </LINE_SHORT_TEXT>          
     </LINES_ROW>
</LINES>
</PO_DATA>I would like to be able to list the bold lines (text attachments) on the PO.
I have been able to list the first <SHORT_TEXT> attachment for the 1st line, but then all of the other attachments are not listed, and I can't work out why.
This is the xsl / codey bits from the rtf template:
<xsl:variable name="lineID" select="../../PO_LINE_ID" />  
<xsl:for-each select="/PO_DATA/LINES/LINES_ROW/LINE_SHORT_TEXT/LINE_SHORT_TEXT_ROW/PO_LINE_ID">
<xsl:if test="$lineID = .">
<xsl:variable name="lineID" select="position()" />
<xsl:value-of select="/PO_DATA/LINES/LINES_ROW/LINE_SHORT_TEXT/LINE_SHORT_TEXT_ROW/SHORT_TEXT[$lineID]" />
</xsl:if>
</xsl:for-each>I don't understand why the attachment for line1 (Attachment for line 1) is listed, but then none of the others are. Presumably I'm doing something stupid, but I can't work out what.
edit - I've printed some of the variables out as the loop is incremented - the problem seems to be that the PO_LINE_ID is not incremented for the line in bold above. It just stays the same - hence why it works for the first line, where the PO_LINE_ID matches, and not for any of the other lines. So the problem is how to get that bold line to increment the PO_LINE_ID?Thanks
null

Answer 1

Sorry to labour the point.
When I used this code against the XML:
<xsl:for-each select="/PO_DATA/LINES/LINES_ROW">
<xsl:value-of select="PO_LINE_ID" />
<xsl:for-each select="./LINE_SHORT_TEXT/LINE_SHORT_TEXT_ROW">
<xsl:value-of select="SHORT_TEXT" />
</xsl:for-each></xsl:for-each>
It generated this against every line:
879135
Attachment for line 1
Another Attachment for line 1
Header Attachment
879136
Attachment for line 2
Header Attachment
879137
Attachment for line 3
Header Attachment
This is my reasoning for the code that works:
<xsl:variable name="bobby1" select="../../PO_LINE_ID" />
Make up a variable name, and give it the value of the current lines PO_LINE_ID
<xsl:for-each select="/PO_DATA/LINES/LINES_ROW/LINE_SHORT_TEXT/LINE_SHORT_TEXT_ROW">
Loop through XML structure e.g.:
<LINE_SHORT_TEXT>
     <LINE_SHORT_TEXT_ROW>
          <PO_LINE_ID>879135</PO_LINE_ID>
          <SHORT_TEXT>Attachment for line 1</SHORT_TEXT> 
     </LINE_SHORT_TEXT_ROW>
     <LINE_SHORT_TEXT_ROW>
          <PO_LINE_ID>879135</PO_LINE_ID>
          <SHORT_TEXT>Another Attachment for line 1</SHORT_TEXT> 
     </LINE_SHORT_TEXT_ROW>
     <LINE_SHORT_TEXT_ROW>
          <PO_LINE_ID>879135</PO_LINE_ID>
          <SHORT_TEXT>Header Attachment</SHORT_TEXT> 
     </LINE_SHORT_TEXT_ROW>
</LINE_SHORT_TEXT><xsl:variable name="bobby2" select="PO_LINE_ID" />
And each time through the loop, assign the 'bobby2' variable the value of the PO_LINE_ID.
<xsl:if test="$bobby1=$bobby2">
This condition is neeed - because lets say that the 'PO_LINE_ID' of the current line is 879135, and the value of the 'PO_LINE_ID' listed in the LINE_SHORT_TEXT_ROW is 879136, then I don't want to output the value of the 'SHORT_TEXT' because it doesn't relate to the PO_LINE_ID of the line currently being checked. In your shorter code version, there is no checking to see if the PO_LINE_ID in the LINE_SHORT_TEXT_ROW section matches the parent PO_LINE_ID, so it just lists all LINE_SHORT_TEXT_ROW data, regardless of whether it is related to the parent line or not.
<xsl:value-of select="SHORT_TEXT" />
</xsl:if>
</xsl:for-each>
I'd be happy to email you over the .rtf and .xml file so you can see what I'm talking about.
Thanks again for your time and help with this. As I said, without your initial help with the for-each loop I would not have fixed it.