Base.Actions.PressSave() not working on Attributes with mass actions - acumatica

Question

I created a custom Action on Contracts that updates the description as well as attributes.
It works fine when doing a single entry and pressing the action button but during Mass Action only the description is updated and saved the attributes are not.
What do I need to do to make the Attributes values save correctly during Mass Action?
public PXSelect<CSAnswers,
Where<CSAnswers.refNoteID, Equal<Current<Contract.noteID>>>> CSAttr;
protected IEnumerable testAction(PXAdapter adapter)
{
//get the activation parameters
var a = CSAttr.Select();
Contract mycontract = Base.CurrentContract.Select();
foreach (CSAnswers item in a.ToList())
{
if (item.AttributeID == "ACTA")
{
item.Value = "Won't Update1";
CSAttr.Update(item); //shouldn't this update?
}
else if (item.AttributeID == "ACTB") //desired mode set by user
{
item.Value = "Won't Update2";
CSAttr.Update(item); //shouldn't this update?
}
}
mycontract.Description = "This Works Fine";
Base.CurrentContract.Update(mycontract);
Base.Actions.PressSave();
return adapter.Get();
}

Answer 1

No need to declare custom CSAttr data view: ContractMaint already contains Answers data view to work with Attributes.
TestAction implemented as below, successfully updates both Contract Description and Attribute Value on a brand new 6.00.1596 Acumatica ERP instance when launched from GI set up as entry-point list:
public class ContractMaintExt : PXGraphExtension<ContractMaint>
{
public override void Initialize()
{
TestAction.IsMass = true;
}
public PXAction<Contract> TestAction;
[PXButton]
[PXUIField(DisplayName = "Test Action")]
public void testAction()
{
Contract mycontract = Base.CurrentContract.Select();
foreach (CSAnswers attr in Base.Answers.Select())
{
if (attr.AttributeID == "CONFIGURAB")
{
attr.Value = "Updated";
Base.Answers.Update(attr); //shouldn't this update?
}
}
mycontract.Description = "This Works Fine";
Base.Contracts.Update(mycontract);
Base.Actions.PressSave();
}
}