Index: t/update/belongs_to_select.t
===================================================================
--- t/update/belongs_to_select.t	(revision 1572)
+++ t/update/belongs_to_select.t	(working copy)
@@ -1,6 +1,6 @@
 use strict;
 use warnings;
-use Test::More tests => 2;
+use Test::More tests => 4;
 
 use HTML::FormFu;
 use lib 't/lib';
@@ -33,3 +33,26 @@
 is($note->master->id, 2);
 
 is($note->note, 'foo');
+
+$form->load_config_file('t/update/belongs_to_select_two.yml');
+
+$schema = MySchema->connect('dbi:SQLite:dbname=t/test.db');
+
+$form->stash->{schema} = $schema;
+
+$rs = $schema->resultset('Master');
+
+$rs->create( { id => 4 } );
+$rs->create( { id => 5 } );
+
+$master = $rs->create( { text_col => 'b', type_id => 2, type2_id => 2 } );
+
+$form->process( { id => 4, note => 'foo' } );
+
+$form->model->create;
+
+$note = $schema->resultset("TwoNote")->find(1);
+
+is($note->id->id, 4);
+
+is($note->note, 'foo');
Index: t/update/belongs_to_select_two.yml
===================================================================
--- t/update/belongs_to_select_two.yml	(revision 0)
+++ t/update/belongs_to_select_two.yml	(revision 0)
@@ -0,0 +1,8 @@
+---
+  model_config:
+    resultset: TwoNote
+  elements:
+    - name: two_note_id
+    - name: note
+    - name: id
+      type: Select
\ No newline at end of file
Index: t/lib/DBICTestLib.pm
===================================================================
--- t/lib/DBICTestLib.pm	(revision 1572)
+++ t/lib/DBICTestLib.pm	(working copy)
@@ -73,6 +73,16 @@
 
 
     $dbh->do( <<SQL );
+CREATE TABLE two_note (
+  id     INTEGER NOT NULL,
+  two_note_id INTEGER PRIMARY KEY NOT NULL,
+  note   TEXT NOT NULL
+);
+
+SQL
+
+
+    $dbh->do( <<SQL );
 CREATE TABLE user (
   id     INTEGER PRIMARY KEY NOT NULL,
   master INTEGER,
@@ -97,6 +107,7 @@
 CREATE TABLE user_band (
   user INTEGER NOT NULL,
   band INTEGER NOT NULL,
+  rating INTEGER,
   PRIMARY KEY (user, band)
 );
 
Index: t/lib/MySchema/UserBand.pm
===================================================================
--- t/lib/MySchema/UserBand.pm	(revision 1572)
+++ t/lib/MySchema/UserBand.pm	(working copy)
@@ -17,6 +17,10 @@
         data_type   => "INTEGER",
         is_nullable => 0,
     },
+    rating => {
+        data_type => "INTEGER",
+        is_nullable => 1,
+    }
 );
 
 __PACKAGE__->set_primary_key( "user", "band" );
Index: lib/HTML/FormFu/Model/DBIC.pm
===================================================================
--- lib/HTML/FormFu/Model/DBIC.pm	(revision 1572)
+++ lib/HTML/FormFu/Model/DBIC.pm	(working copy)
@@ -883,12 +883,13 @@
             my @values = $form->param_list($nested_name);
             my @rows;
 
-            if (@values) {
-                my $config = _compatible_config($field);
+            my $config = _compatible_config($field);
 
-                my ($pk) = $config->{default_column}
-                    || $related->result_source->primary_columns;
+            my ($pk) = $config->{default_column}
+                || $related->result_source->primary_columns;
 
+            if (@values) {
+                
                 $pk = "me.$pk" unless $pk =~ /\./;
 
                 @rows = $related->result_source->resultset->search( {
@@ -896,9 +897,24 @@
                         $pk => { -in => \@values } } )->all;
             }
 
-            my $set_method = "set_$name";
-
-            $dbic->$set_method( \@rows );
+            if($config->{additive}) {
+                
+                my $relinfo = $dbic->result_source->relationship_info($name);
+                
+                $pk =~ s/^.*\.//;
+                
+                my $set_method = "add_to_$name";
+                my $remove_method = "remove_from_$name";
+                                
+                foreach my $row ( @rows ) {
+                    $dbic->$remove_method($row);
+                    $dbic->$set_method($row, $config->{link_values});
+                }
+            } else {
+                my $set_method = "set_$name";
+                
+                $dbic->$set_method( \@rows, $config->{link_values} );
+            }
         }
     }
 }
@@ -1396,7 +1412,35 @@
           model_config:
             default_column: foo
 
+If you want to set columns on the link table you can do so if you add a 
+C<link_values> attribute to C<model_config>:
 
+    ---
+    element:
+        - type: Checkboxgroup
+          name: authors
+          model_config:
+            link_values:
+              foo: bar
+
+
+The default implementation will first remove all related objects and set the
+new ones (see L<http://search.cpan.org/perldoc?DBIx::Class::Relationship::Base#set_$rel>).
+If you want to add the selected objects to the current set of objects
+set C<additive> in the C<model_config>.
+
+    ---
+    element:
+        - type: Checkboxgroup
+          name: authors
+          model_config:
+            additive: 1
+            options_from_model: 0
+
+(<options_from_model> is set to C<0> because this L</options_from_model> will try to fetch
+all objects from the result class C<Authors> if C<model_config> is specified
+without a C<resultset> attribute.)
+
 =head1 COMMON ARGUMENTS
 
 The following items are supported in the optional C<config> hash-ref argument
Index: Makefile.PL
===================================================================
--- Makefile.PL	(revision 1572)
+++ Makefile.PL	(working copy)
@@ -5,7 +5,7 @@
 all_from 'lib/HTML/FormFu/Model/DBIC.pm';
 
 requires 'DBD::SQLite';
-requires 'DBIx::Class' => '0.08106';
+requires 'DBIx::Class' => '0.08108';
 # DBIx::Class 0.08106 switched from DateTime::Format::MySQL to ::SQLite
 # Rather than changing our prereqs depending on the installed version
 # of DBIx::Class, just bump the required version