Linked "prefetch" in columns documentation

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

diff --git a/lib/DBIx/Class/ResultSet.pm b/lib/DBIx/Class/ResultSet.pm
index 4513011..0076734 100644 (file)
--- a/lib/DBIx/Class/ResultSet.pm
+++ b/lib/DBIx/Class/ResultSet.pm
@@ -3813,8 +3813,10 @@ sub _calculate_score {
 
   if (ref $b eq 'HASH') {
     my ($b_key) = keys %{$b};
+    $b_key = '' if ! defined $b_key;
     if (ref $a eq 'HASH') {
       my ($a_key) = keys %{$a};
+      $a_key = '' if ! defined $a_key;
       if ($a_key eq $b_key) {
         return (1 + $self->_calculate_score( $a->{$a_key}, $b->{$b_key} ));
       } else {
@@ -4081,13 +4083,13 @@ is the same as
     as     => [qw(some_column dbic_slot)]
 
 If you want to individually retrieve related columns (in essence perform
-manual prefetch) you have to make sure to specify the correct inflation slot
+manual L</prefetch>) you have to make sure to specify the correct inflation slot
 chain such that it matches existing relationships:
 
     my $rs = $schema->resultset('Artist')->search({}, {
         # required to tell DBIC to collapse has_many relationships
         collapse => 1,
-        join     => { cds => 'tracks'},
+        join     => { cds => 'tracks' },
         '+columns'  => {
           'cds.cdid'         => 'cds.cdid',
           'cds.tracks.title' => 'tracks.title',
@@ -4591,19 +4593,14 @@ setting is ignored and an appropriate warning is issued.
 
 =head2 where
 
-=over 4
-
-Adds to the WHERE clause.
+Adds extra conditions to the resultset, combined with the preexisting C<WHERE>
+conditions, same as the B<first> argument to the L<search operator|/search>
 
   # only return rows WHERE deleted IS NULL for all searches
   __PACKAGE__->resultset_attributes({ where => { deleted => undef } });
 
-Can be overridden by passing C<< { where => undef } >> as an attribute
-to a resultset.
-
-For more complicated where clauses see L<SQL::Abstract/WHERE CLAUSES>.
-
-=back
+Note that the above example is
+L<strongly discouraged|DBIx::Class::ResultSource/resultset_attributes>.
 
 =head2 cache