t/prefetch/manual.t

   1 use strict;
   2 use warnings;
   3
   4 use Test::More;
   5 use Test::Exception;
   6 use lib qw(t/lib);
   7 use DBICTest;
   8
   9 my $schema = DBICTest->init_schema();
  10
  11 my $rs = $schema->resultset ('CD')->search ({}, {
  12   join => [ 'tracks', { single_track => { cd => { artist => { cds => 'tracks' } } } }  ],
  13   collapse => 1,
  14   columns => [
  15     { 'year'                                    => 'me.year' },               # non-unique
  16     { 'genreid'                                 => 'me.genreid' },            # nullable
  17     { 'tracks.title'                            => 'tracks.title' },          # non-unique (no me.id)
  18     { 'single_track.cd.artist.cds.cdid'         => 'cds.cdid' },              # to give uniquiness to ...tracks.title below
  19     { 'single_track.cd.artist.cds.artist'       => 'cds.artist' },            # non-unique
  20     { 'single_track.cd.artist.cds.year'         => 'cds.year' },              # non-unique
  21     { 'single_track.cd.artist.cds.genreid'      => 'cds.genreid' },           # nullable
  22     { 'single_track.cd.artist.cds.tracks.title' => 'tracks_2.title' },        # unique when combined with ...cds.cdid above
  23     { 'latest_cd'                               => { max => 'cds.year' } },   # random function
  24   ],
  25   result_class => 'DBIx::Class::ResultClass::HashRefInflator',
  26 });
  27
  28 use Data::Dumper::Concise;
  29 die Dumper [$rs->all];
  30
  31