add field on vendor screen - acumatica

Question

when I add a new field, in the payment configuration tab.
It adds the field in location to the database, but at the same time I create DAC addressExt, I don't understand why.
here is the DAC of each one that created me.
First.
the field is created in this table: Location
namespace PX.Objects.CR.Standalone
{
public class LocationExt : PXCacheExtension<PX.Objects.CR.Standalone.Location>
{
#region UsrTest
[PXDBBool]
[PXUIField(DisplayName="test")]
public virtual bool? UsrTest { get; set; }
public abstract class usrTest : PX.Data.BQL.BqlBool.Field<usrTest> { }
#endregion
}
}
second.
namespace PX.Objects.CR
{
public class AddressExt : PXCacheExtension<PX.Objects.CR.Address>
{
#region UsrTest
[PXDBBool]
[PXUIField(DisplayName = "test")]
public virtual bool? UsrTest { get; set; }
public abstract class usrTest : PX.Data.BQL.BqlBool.Field<usrTest> { }
#endregion
}
}
view image:
I hope you understand, I'm not good at English.

Answer 1

This is actually being done by design. The DAC you are editing is a Projection consisting of multiple DACs. Check this link out from Sergey Marenich
PXProjection uses 2 Data Access Classes for quotes:
One class represents the table – PX.Objects.CR.Standalone.CRQuote.
Another represents view as combination of DACs in select – PX.Objects.CR.CRQuote.
And to correctly work, custom field needs to be added in both of the places. And Projection field should be linked to table field using BqlField property of DBFieldAttributes.