Write expression for conditional check

I want to write this code in expression snaplogic.
I need to map TestID.

<xsl:variable name=“TestID”>
<xsl:if test=“exists(node()/IDOC/A1[VW=‘F’]/NO)”>
<xsl:copy-of select=“node()/IDOC/A1[VW=‘F’]/NO”>
<xsl:if test=“not(exists(node()/IDOC/A1[VW=‘F’]/NO))”>
<xsl:copy-of select=“node()/IDOC/A1[VW=‘F’]/NP”>

How do I do it?

Hi @Sahil,

You can map attributes like that: $variable['@TestID'].


hi Viktor,

I need to translate the whole logic which was done in SAP to snaplogic.

I’ve misunderstood, I see now what you want to do.

So, I don’t have problem with writing expressions, but I am not good at reading xslt schemas.
Some of the syntax I understand, but “node()/IDOC/A1[VW=‘F’]/NO)” can you explain this to me. Is this a path ?
And what are node() and copy-of ?

so basically in snaplogic terms it would be:-

“copy-of” will copy the value of the xml element.

You can try something like this.

$Data.IDOC.A1.get('@VW') == "F" ? $Data.IDOC.A1['@VW'].get('NO', $Data.IDOC.B1['@VW'].NP) : null

If this won’t work then, you can send me sample data so I can have better understanding of the problem.

hi, it did not work.
below is the xml:-

<?xml version="1.0" encoding="UTF-8"?>
		<K01 SEGMENT="1">
		<ED SEGMENT="1">
		<ED SEGMENT="1">
		<A1 SEGMENT="1">
		<A1 SEGMENT="1">
		<A1 SEGMENT="1">
		<A1 SEGMENT="1">

so in the above example, it should give 23334455 and if <NO> does not exists then 0000070252.

Hello @Sahil

Did you try to use it XLST transformer snap? It transforms your incoming data by applying the XSL transformation rules.

You don’t need to map it by hand.

Pero Manchevski


I am working on a migration project and migrate from SAP platform to snapLogic.
so it would be better if I do it in expression inside mapper.

Hi @Sahil,

Here are two expressions, I was not sure because it is array does always will have only one VW that contains ‘F’ in the value.

First expression. Finds all NO or NP that contains ‘F’ in VW field.
$Data.IDOC.A1.filter(e => e.get('VW').contains('F')).map(x => x.get('NO') != null ? x.NO : x.NP)

But I think that the second expression is more correct. This expression finds the first one element in the array that contains ‘F’ in VW, and returns NO if exist or else NP.
$Data.IDOC.A1.find(e => e.get('VW').contains('F')).get('NO', $Data.IDOC.A1.find(e => e.get('VW').contains('F')).get('NP'))

By default this expression return null, and if you want something else you can add second parameter in the get method for default values.
Ex: .get('NP', "Default")