you want to check if a resultset has any results, you must use C<if $rs
!= 0>.
-=head1 CUSTOM ResultSet CLASSES THAT USE Moose
-
-If you want to make your custom ResultSet classes with L<Moose>, use a template
-similar to:
-
- package MyApp::Schema::ResultSet::User;
-
- use Moose;
- use namespace::autoclean;
- use MooseX::NonMoose;
- extends 'DBIx::Class::ResultSet';
-
- sub BUILDARGS { $_[2] }
-
- ...your code...
-
- __PACKAGE__->meta->make_immutable;
-
- 1;
-
-The L<MooseX::NonMoose> is necessary so that the L<Moose> constructor does not
-clash with the regular ResultSet constructor. Alternatively, you can use:
-
- __PACKAGE__->meta->make_immutable(inline_constructor => 0);
-
-The L<BUILDARGS|Moose::Manual::Construction/BUILDARGS> is necessary because the
-signature of the ResultSet C<new> is C<< ->new($source, \%args) >>.
-
=head1 EXAMPLES
=head2 Chaining resultsets
See: L</search>, L</count>, L</get_column>, L</all>, L</create>.
+=head2 Custom ResultSet classes using Moose
+
+If you want to make your custom ResultSet classes with L<Moose>, use a template
+similar to:
+
+ package MyApp::Schema::ResultSet::User;
+
+ use Moose;
+ use MooseX::NonMoose;
+ extends 'DBIx::Class::ResultSet';
+
+ sub BUILDARGS { $_[2] }
+
+ ...your code...
+
+ __PACKAGE__->meta->make_immutable;
+
+ 1;
+
+The L<MooseX::NonMoose> is necessary so that the L<Moose> constructor does not
+clash with the regular ResultSet constructor. Alternatively, you can use:
+
+ __PACKAGE__->meta->make_immutable(inline_constructor => 0);
+
+The L<BUILDARGS|Moose::Manual::Construction/BUILDARGS> is necessary because the
+signature of the ResultSet C<new> is C<< ->new($source, \%args) >>.
+
=head1 METHODS
=head2 new
foreach my $rel (@rels) {
next unless ref $data->[$index]->{$rel} eq "HASH";
my $result = $self->related_resultset($rel)->create($data->[$index]->{$rel});
- my ($reverse_relname, $reverse_relinfo) = %{$rsrc->reverse_relationship_info($rel)};
+ my (undef, $reverse_relinfo) = %{$rsrc->reverse_relationship_info($rel)};
my $related = $result->result_source->_resolve_condition(
$reverse_relinfo->{cond},
$self,
if (my $cache = $self->get_cache) {
my @related_cache = map
- { @{$_->related_resultset($rel)->get_cache||[]} }
+ { $_->related_resultset($rel)->get_cache || () }
@$cache
;
- $new->set_cache(\@related_cache) if @related_cache;
+ $new->set_cache([ map @$_, @related_cache ]) if @related_cache == @$cache;
}
$new;
expression). Adds C<me.> onto the start of any column without a C<.> in
it and sets C<select> from that, then auto-populates C<as> from
C<select> as normal. (You may also use the C<cols> attribute, as in
-earlier versions of DBIC, but this is deprecated.)
+earlier versions of DBIC, but this is deprecated)
Essentially C<columns> does the same as L</select> and L</as>.
- columns => [ 'foo', { bar => 'baz' } ]
+ columns => [ 'some_column', { dbic_slot => 'another_column' } ]
is the same as
- select => [qw/foo baz/],
- as => [qw/foo bar/]
+ select => [qw(some_column another_column)],
+ 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
+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'},
+ '+columns' => {
+ 'cds.cdid' => 'cds.cdid',
+ 'cds.tracks.title' => 'tracks.title',
+ },
+ });
=head2 +columns
+B<NOTE:> You B<MUST> explicitly quote C<'+columns'> when using this attribute.
+Not doing so causes Perl to incorrectly interpret C<+columns> as a bareword
+with a unary plus operator before it, which is the same as simply C<columns>.
+
=over 4
-=item Value: \@columns
+=item Value: \@extra_columns
=back
Indicates additional columns to be selected from storage. Works the same as
-L</columns> but adds columns to the selection. (You may also use the
+L</columns> but adds columns to the current selection. (You may also use the
C<include_columns> attribute, as in earlier versions of DBIC, but this is
-deprecated). For example:-
+deprecated)
$schema->resultset('CD')->search(undef, {
'+columns' => ['artist.name'],
column (or relationship) accessor, and 'name' is the name of the column
accessor in the related table.
-B<NOTE:> You need to explicitly quote '+columns' when defining the attribute.
-Not doing so causes Perl to incorrectly interpret +columns as a bareword with a
-unary plus operator before it.
-
-=head2 include_columns
-
-=over 4
-
-=item Value: \@columns
-
-=back
-
-Deprecated. Acts as a synonym for L</+columns> for backward compatibility.
-
=head2 select
=over 4
e.g. an C<ORDER BY> clause. This is done via the C<-as> B<select function
attribute> supplied as shown in the example above.
-B<NOTE:> You need to explicitly quote '+select'/'+as' when defining the attributes.
-Not doing so causes Perl to incorrectly interpret them as a bareword with a
-unary plus operator before it.
-
=head2 +select
+B<NOTE:> You B<MUST> explicitly quote C<'+select'> when using this attribute.
+Not doing so causes Perl to incorrectly interpret C<+select> as a bareword
+with a unary plus operator before it, which is the same as simply C<select>.
+
=over 4
-Indicates additional columns to be selected from storage. Works the same as
-L</select> but adds columns to the default selection, instead of specifying
-an explicit list.
+=item Value: \@extra_select_columns
=back
+Indicates additional columns to be selected from storage. Works the same as
+L</select> but adds columns to the current selection, instead of specifying
+a new explicit list.
+
=head2 as
=over 4
=back
-Indicates column names for object inflation. That is L</as> indicates the
+Indicates DBIC-side names for object inflation. That is L</as> indicates the
slot name in which the column value will be stored within the
L<Row|DBIx::Class::Row> object. The value will then be accessible via this
identifier by the C<get_column> method (or via the object accessor B<if one
=head2 +as
+B<NOTE:> You B<MUST> explicitly quote C<'+as'> when using this attribute.
+Not doing so causes Perl to incorrectly interpret C<+as> as a bareword
+with a unary plus operator before it, which is the same as simply C<as>.
+
=over 4
-Indicates additional column names for those added via L</+select>. See L</as>.
+=item Value: \@extra_inflation_names
=back
+Indicates additional inflation names for selectors added via L</+select>. See L</as>.
+
=head2 join
=over 4
projects / dbsrgits/DBIx-Class.git / blobdiff