X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FResultSetColumn.pm;h=68cc4e0c795f8c765a5e9135da4ef67c7e2bd347;hb=b6d9f089c019e7d613f97ef4c8384715c1d5cfdc;hp=49b84560c3af8b78392ae638985ae412afb07903;hpb=eb98561caf4a8342cd6cc477499ef71120765fee;p=dbsrgits%2FDBIx-Class.git

diff --git a/lib/DBIx/Class/ResultSetColumn.pm b/lib/DBIx/Class/ResultSetColumn.pm
index 49b8456..68cc4e0 100644
--- a/lib/DBIx/Class/ResultSetColumn.pm
+++ b/lib/DBIx/Class/ResultSetColumn.pm
@@ -35,12 +35,10 @@ passed as params. Used internally by L<DBIx::Class::ResultSet/get_column>.
 sub new {
   my ($class, $rs, $column) = @_;
   $class = ref $class if ref $class;
-
-  my $object_ref = { _column => $column,
-		     _parent_resultset => $rs };
-  
-  my $new = bless $object_ref, $class;
-  $new->throw_exception("column must be supplied") unless ($column);
+  my $new_parent_rs = $rs->search_rs; # we don't want to mess up the original, so clone it
+  $new_parent_rs->{attrs}->{prefetch} = undef; # prefetch causes additional columns to be fetched
+  my $new = bless { _column => $column, _parent_resultset => $new_parent_rs }, $class;
+  $new->throw_exception("column must be supplied") unless $column;
   return $new;
 }
 
@@ -64,7 +62,6 @@ one value.
 
 sub next {
   my $self = shift;
-    
   $self->{_resultset} = $self->{_parent_resultset}->search(undef, {select => [$self->{_column}], as => [$self->{_column}]}) unless ($self->{_resultset});
   my ($row) = $self->{_resultset}->cursor->next;
   return $row;
@@ -111,8 +108,7 @@ resultset (or C<undef> if there are none).
 =cut
 
 sub min {
-  my $self = shift;
-  return $self->func('MIN');
+  return shift->func('MIN');
 }
 
 =head2 max
@@ -133,8 +129,7 @@ resultset (or C<undef> if there are none).
 =cut
 
 sub max {
-  my $self = shift;
-  return $self->func('MAX');
+  return shift->func('MAX');
 }
 
 =head2 sum
@@ -155,8 +150,7 @@ the resultset. Use on varchar-like columns at your own risk.
 =cut
 
 sub sum {
-  my $self = shift;
-  return $self->func('SUM');
+  return shift->func('SUM');
 }
 
 =head2 func
@@ -180,11 +174,14 @@ value. Produces the following SQL:
 =cut
 
 sub func {
-  my $self = shift;
-  my $function = shift;
+  my ($self,$function) = @_;
+  my $cursor = $self->{_parent_resultset}->search(undef, {select => {$function => $self->{_column}}, as => [$self->{_column}]})->cursor;
+  
+  if( wantarray ) {
+    return map { $_->[ 0 ] } $cursor->all;
+  }
 
-  my ($row) = $self->{_parent_resultset}->search(undef, {select => {$function => $self->{_column}}, as => [$self->{_column}]})->cursor->next;
-  return $row;
+  return ( $cursor->next )[ 0 ];
 }
 
 1;