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Hengameh Karimi · Aug 9, 2022

Question on Subtransform in DTL to transform from a JSON/XML to a custom message

#API #InterSystems IRIS

I am  building a DTL to transform from a JSON/XML to a custom message. The DTL works fine, but I wants to move some part of the data transformation to another DTL and calls it using the <subtransform> action from the main DTL.

to define 

I have the <subtransform class='ADT.DTL.SDAToPatientIdentifierInfo' targetObj='target.PatientIdentifierInfo.()' sourceObj='source.{Patient.Extension.PatientIdentifiers(k1)}' />

when I am testing this subtransform I am getting the following for each identifier in the message.

<PatientIdentifierInfo>
    <PatientIdentifier xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
    <PatientIdentifier xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
    <PatientIdentifier xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
    <PatientIdentifier xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
    <PatientIdentifier xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
    <PatientIdentifier xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
    <PatientIdentifier xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
    <PatientIdentifier xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
    <PatientIdentifier xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
    <PatientIdentifier xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
    <PatientIdentifier xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
  </PatientIdentifierInfo>

 

My expectation is receiving the PatientIdentifierInfo in array of JSON format.

Does any one knows why?

Product version: IRIS 2022.1
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Discussion (4)1
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Stuart Byrne · Aug 19, 2022

The key (k1)  is missing from your targetObj:
<subtransform class='ADT.DTL.SDAToPatientIdentifierInfo' targetObj='target.PatientIdentifierInfo.()' sourceObj='source.{Patient.Extension.PatientIdentifiers(k1)}' />

In your master transform is this housed within a foreach loop and k1 defined?

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Hengameh Karimi · Aug 19, 2022

Thank you for looking into this and you are right!

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Hengameh Karimi · Aug 19, 2022

Hi Stuart,  have you work with multiple subtransform within a DTL when the subtransform having Extension data elements?

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Stuart Byrne · Sep 7, 2022

The use of sub transforms is always subjective subject.

Go what feels best for you if your having many lines for a specific section / function then a sub-transform is suitable.

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