finished relation completer

demo/work/jobs/IdListPayload.hpp

@@ -5,6 +5,8 @@
 
 #include "matador/object/collection.hpp"
 
+#include "matador/utils/foreign_attributes.hpp"
+
 namespace work::models::jobs {
 struct IdListPayload : Payload {
     matador::object::collection<unsigned long long> ids;
@@ -12,7 +14,7 @@ struct IdListPayload : Payload {
     void process( Operator& op ) {
         namespace field = matador::access;
         field::process( op, *matador::base_class<Payload>( this ) );
-        field::has_many( op, "payload_ids", ids );
+        field::has_many( op, "payload_ids", ids, "payload_id", matador::utils::default_foreign_attributes );
     }
 };
 }