Setting the Value of a Custom Field in Acumatica 2019 R1 - acumatica

Question

I am in the process of upgrading from Acumatica 2018 R2 to 2019 R1. In quite a few of my customizations, I have code, triggered by a button click or an event handler, which sets/changes the value of a custom field. That was working as expected in 2018 R2. However, in 2019 R1 the values on the custom fields are not being updated. Here's a simple example.
public class SOOrderEntry_SOOpenPOsGILink_Extension : PXGraphExtension<SOOrderEntry>
{
protected virtual void SOLine_RowSelected(PXCache sender, PXRowSelectedEventArgs e)
{
SOLine row = (SOLine)e.Row;
if (row != null)
{
bool isEmpty = true;
SOLineExt ext = row.GetExtension<SOLineExt>();
// logic determining value of isEmpty
ext.UsrEnableOpenPOs = isEmpty;
}
}
}
Where UsrEnableOpenPOs is defined as folows.
public class SOLineExt : PXCacheExtension<PX.Objects.SO.SOLine>
{
#region UsrEnableOpenPOs
[PXBool]
[PXUIField(DisplayName="EnableOpenPOs", Enabled = false, Visible=false)]
[PXUnboundDefault(false, PersistingCheck = PXPersistingCheck.Nothing)]
public virtual bool? UsrEnableOpenPOs { get; set; }
public abstract class usrEnableOpenPOs : PX.Data.BQL.BqlBool.Field<usrEnableOpenPOs> { }
#endregion
}
In this example, when a SOLine is selected on the SO Order Entry screen, the value of SOLineExt.UsrEnableOpenPOs should be set to the value of isEmpty. This code works in 2018 R2 and correctly updates UsrEnableOpenPOs. However, in 2019 R1, the code is triggered correctly and runs, but the value on the screen is not updated.
As I mentioned, we have quite a few instances where we are running into this problem. In some cases the code is triggered by a button click and in other cases by different events like RowSelected, RowInserting, FieldUpdated and RowUpdated.
I would appreciate some insight on why this code is no longer working and what I can do to fix it.

Answer 1

Should always try to set the value in cache vs the row instance.
ex:
sender.SetValueExt<SOLineExt.usrEnableOpenPOs>(row, isEmptry);
Unbound fields should be set in the RowSelecting or FieldSelecting events. The RowSelected event should be for UI changes such as disabled, visible, etc. fields.