Photoshop plug-in, cannot modify XMP

[erpang]

I used Batchplay to change the XMP of a document ，But there was no way to modify it successfully

[simonhenke]

Did you try logging the batchPlay result or any errors in a try catch?
Also, what’s the before/after of the Metadata and how does your xmpString look like?

[erpang]

import { convert} from 'xmlbuilder2';

 function getDocumentXMPMeta(docId,xmpString){
    const res = await batchPlay([ {
    _obj: 'get',
    _target: [
      {
        _ref: 'document',
        _id: documentID,
        _property: 'XMPMetadataAsUTF8',
      },
    ],
    _options: {
      dialogOptions: 'dontDisplay',
    },
  }], {
  });
  return res[0]?.XMPMetadataAsUTF8 || '';
}

 function setDocumentXMPMeta(docId,xmpString){
    const res = await batchPlay([ {
    _obj: 'set',
    _target: [
      {
        _ref: 'document',
        _id: docId,
        _property: 'XMPMetadataAsUTF8',
      },
    ],
    to: {
      _obj: 'document',
      XMPMetadataAsUTF8: xmpString,
    },
  }], {
  });
  return res[0]?.XMPMetadataAsUTF8 || '';
}

function setMetaXmp(docId){
  const xmpString = await getDocumentXMPMeta(docId);
  const obj = convert(xmpString, { format: 'object' });
  obj['x:xmpmeta']['rdf:RDF']['rdf:Description'][`@xmlns:${123}`] = 'test1';
  obj['x:xmpmeta']['rdf:RDF']['rdf:Description'][`${'xml'}:${456}`] = 'test2';
  const newXmpString = convert(obj, { format: 'xml' });
  await setDocumentXMPMeta(docId, newXmpString);
  const newString = await getDocumentXMPMeta(docId);
  console.log('oldXml',xmpString) //old xmp 
  console.log('newXml',newString)   // new xmp
}

setMetaXmo(1); // execute

I’m transferring the XML：

But I got a new one：

this fails to modify xmp