Sort by parent ticket custom field in search

RT Developers
1

Hi

I’ve created new column for search results with parent ticket custom field ‘Address’ in RT_Ticket/ColumnMap:

ParentAddress => {
    title     => 'ParentAddress', # loc
    attribute => 'CF.{Address}',
    value     => sub {
        my $dep = $_[0]->DependedOnBy;
        while ( my $ref = $dep->Next ) {
            my $dep_obj = $ref->BaseObj;
            my $address = $dep_obj->FirstCustomFieldValue('Address') || '';
            if ( $address ) {
                return $address;
            }
        }
        return loc('(No Address)');
    }
},

But my results sorting only by current ticket ‘Address’ field, not by parent ‘Address’. Can I do something as ‘DependedOnBy.CustomField.Address’ for sort by parent ticket custom field?

Thanks!