Merge 'trunk' into 'sybase'

[dbsrgits/DBIx-Class.git] / lib / DBIx / Class / ResultSet.pm

diff --git a/lib/DBIx/Class/ResultSet.pm b/lib/DBIx/Class/ResultSet.pm
index ae15cde..6421875 100644 (file)
--- a/lib/DBIx/Class/ResultSet.pm
+++ b/lib/DBIx/Class/ResultSet.pm
@@ -2867,7 +2867,7 @@ sub _resolved_attrs {
 
   if ( $attrs->{join} || $attrs->{prefetch} ) {
 
-    $self->throw_exception ('join/prefetch can not be used with a literal scalarref {from}')
+    $self->throw_exception ('join/prefetch can not be used with a custom {from}')
       if ref $attrs->{from} ne 'ARRAY';
 
     my $join = delete $attrs->{join} || {};
@@ -3013,6 +3013,13 @@ sub _rollout_hash {
 sub _calculate_score {
   my ($self, $a, $b) = @_;
 
+  if (defined $a xor defined $b) {
+    return 0;
+  }
+  elsif (not defined $a) {
+    return 1;
+  }
+
   if (ref $b eq 'HASH') {
     my ($b_key) = keys %{$b};
     if (ref $a eq 'HASH') {