D365FO – AX – Update Data Entity Target Entity fields with X++

 Imagine you want to set the value of a field of the Target Entity of a Data Entity with X ++ code

You have to create an extension class that extends the data Entity, extends the “mapEntityToDataSource” method, and adds your code inside.

[ExtensionOf(tableStr(PurchPurchaseOrderHeaderV2Entity))] //Extends Data Entity

final class Al0PurchPurchaseOrderHeaderV2Entity_Extension

{

    public void mapEntityToDataSource(DataEntityRuntimeContext _entityCtx, DataEntityDataSourceRuntimeContext _dataSourceCtx) //Extends method

    {

        switch (_dataSourceCtx.name())

        {

            case dataEntityDataSourceStr(PurchPurchaseOrderHeaderV2Entity, PurchTable):

            PurchPurchaseOrderHeaderV2Entity purchPurchaseOrderHeaderV2Entity = _entityCtx.getEntityRecord(); //Get Data Entity buffer (Source Entity)

            PurchTable purchTable = _dataSourceCtx.getBuffer(); //Get Target Entity buffer

            purchTable.MatchingAgreement = PurchAgreementHeader::findAgreementId(purchPurchaseOrderHeaderV2Entity.Al0PurchAgreementRef).RecId; //Set Target entity field 

         

            break;

        }

        

        next mapEntityToDataSource(_entityCtx, _dataSourceCtx);

    }