Index: /Users/mo/Documents/workspace/HTML-FormFu-Model-DBIC/t/update/belongs_to_select.yml
===================================================================
--- /Users/mo/Documents/workspace/HTML-FormFu-Model-DBIC/t/update/belongs_to_select.yml	(revision 0)
+++ /Users/mo/Documents/workspace/HTML-FormFu-Model-DBIC/t/update/belongs_to_select.yml	(revision 0)
@@ -0,0 +1,8 @@
+---
+  model_config:
+    resultset: Note
+  elements:
+    - name: id
+    - name: note
+    - name: master
+      type: Select
\ No newline at end of file
Index: /Users/mo/Documents/workspace/HTML-FormFu-Model-DBIC/t/update/belongs_to_select.t
===================================================================
--- /Users/mo/Documents/workspace/HTML-FormFu-Model-DBIC/t/update/belongs_to_select.t	(revision 0)
+++ /Users/mo/Documents/workspace/HTML-FormFu-Model-DBIC/t/update/belongs_to_select.t	(revision 0)
@@ -0,0 +1,35 @@
+use strict;
+use warnings;
+use Test::More tests => 2;
+
+use HTML::FormFu;
+use lib 't/lib';
+use DBICTestLib 'new_db';
+use MySchema;
+
+new_db();
+
+my $form = HTML::FormFu->new;
+
+$form->load_config_file('t/update/belongs_to_select.yml');
+
+my $schema = MySchema->connect('dbi:SQLite:dbname=t/test.db');
+
+$form->stash->{schema} = $schema;
+
+my $rs = $schema->resultset('Master');
+
+$rs->create( { id => 1 } );
+$rs->create( { id => 2 } );
+
+my $master = $rs->create( { text_col => 'b', type_id => 2, type2_id => 2 } );
+
+$form->process( { master => 2, note => 'foo' } );
+
+$form->model->create;
+
+my $note = $schema->resultset("Note")->find(1);
+
+is($note->master->id, 2);
+
+is($note->note, 'foo');
Index: /Users/mo/Documents/workspace/HTML-FormFu-Model-DBIC/t/update/many_to_many_select_additive.yml
===================================================================
--- /Users/mo/Documents/workspace/HTML-FormFu-Model-DBIC/t/update/many_to_many_select_additive.yml	(revision 0)
+++ /Users/mo/Documents/workspace/HTML-FormFu-Model-DBIC/t/update/many_to_many_select_additive.yml	(revision 0)
@@ -0,0 +1,21 @@
+---
+auto_fieldset: 1
+
+elements:
+  - type: Hidden
+    name: id
+  
+  - type: Text
+    name: name
+  
+  - type: Select
+    name: bands
+    multiple: 1
+    model_config:
+      additive: 1
+      options_from_model: 0
+      link_values:
+        rating: 100
+  
+  - type: Submit
+    name: submit
Index: /Users/mo/Documents/workspace/HTML-FormFu-Model-DBIC/t/lib/MySchema/Note.pm
===================================================================
--- /Users/mo/Documents/workspace/HTML-FormFu-Model-DBIC/t/lib/MySchema/Note.pm	(revision 1508)
+++ /Users/mo/Documents/workspace/HTML-FormFu-Model-DBIC/t/lib/MySchema/Note.pm	(working copy)
@@ -16,7 +16,7 @@
 
 __PACKAGE__->set_primary_key("id");
 
-__PACKAGE__->belongs_to( master => 'MySchema::Master', 'id' );
+__PACKAGE__->belongs_to( master => 'MySchema::Master' );
 
 1;
 
Index: /Users/mo/Documents/workspace/HTML-FormFu-Model-DBIC/lib/HTML/FormFu/Model/DBIC.pm
===================================================================
--- /Users/mo/Documents/workspace/HTML-FormFu-Model-DBIC/lib/HTML/FormFu/Model/DBIC.pm	(revision 1508)
+++ /Users/mo/Documents/workspace/HTML-FormFu-Model-DBIC/lib/HTML/FormFu/Model/DBIC.pm	(working copy)
@@ -487,17 +487,46 @@
                 } );
         }
         elsif ( defined $multi_value ) {
-            # has_one or might_have relationship
+            # belongs_to, has_one or might_have relationship
                         
             my $info = $dbic->result_source->relationship_info($rel);
-            
+                    
             my @fpkey = $dbic->related_resultset($rel)->result_source->primary_columns;
             
-            croak 'multiple primary keys are not supported for has_one/might_have relationships'
-              if(@fpkey > 1);
+            my @cond = (%{$info->{cond}}); 
             
+              # make sure $rel is a has_one or might_have rel
+              # stolen from SQL/Translator/Parser/DBIx/Class
+                
+            my $fk_constraint;
+
+            # Get the key information, mapping off the foreign/self markers
+            my @refkeys = map {/^\w+\.(\w+)$/} @cond;
+            my @keys = map {$info->{cond}->{$_} =~ /^\w+\.(\w+)$/} @cond;
+
+            #first it can be specified explicitly
+            if ( exists $info->{attrs}{is_foreign_key_constraint} ) {
+                $fk_constraint = $info->{attrs}{is_foreign_key_constraint};
+            }
+
+            # it can not be multi
+            elsif ( $info->{attrs}{accessor}
+                && $info->{attrs}{accessor} eq 'multi' ) {
+                $fk_constraint = 0;
+            }
+
+            # if indeed single, check if all self.columns are our primary keys.
+            # this is supposed to indicate a has_one/might_have...
+            # where's the introspection!!?? :)
+            else {
+                $fk_constraint = not $dbic->result_source->compare_relationship_keys( \@keys, \@fpkey );
+            }
+
+            next if($fk_constraint);
+            
+            
             my $fpkey = shift @fpkey;
-            my ( $fkey, $skey ) = %{ $info->{cond} };
+            my ( $fkey, $skey ) = @cond;
             $fkey =~ s/^foreign\.//;
             $skey =~ s/^self\.//;
             
@@ -505,6 +534,12 @@
             
             croak 'The primary key and the foreign key may not be the same column in class '.$fclass
               if $fpkey eq $fkey;
+            
+            croak 'multiple primary keys are not supported for has_one/might_have relationships'
+              if(@fpkey > 1);
+                        
+            
+            
               
             my $schema = $dbic->result_source->schema;