From: Jess Robinson <castaway@desert-island.me.uk>
Date: Sun, 28 Jun 2009 04:11:08 +0000 (+0000)
Subject: Tests for grouping with prefetch
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=b3426cd2d95147524c1af7c50f5821192a820fac;p=dbsrgits%2FDBIx-Class-Historic.git

Tests for grouping with prefetch
---

diff --git a/t/prefetch/grouped.t b/t/prefetch/grouped.t
new file mode 100644
index 0000000..c517741
--- /dev/null
+++ b/t/prefetch/grouped.t
@@ -0,0 +1,75 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+use Test::More 'no_plan';
+
+use lib qw(t/lib);
+use DBICTest;
+use DBIC::SqlMakerTest;
+use DBIC::DebugObj;
+
+#plan tests => 6;
+
+my $schema = DBICTest->init_schema( deploy_args => { add_drop_table => 1 } );
+
+## CD has_many Tracks
+## Track belongs_to CD
+
+my $cd_count = $schema->resultset('CD')->count;
+is($cd_count, 5, 'Plain CDs count');
+# print STDERR "CDs: $cd_count\n";
+
+my $cd_tracks = $schema->resultset('CD')->related_resultset('tracks')->count;
+is($cd_tracks, 15, 'Tracks for CDs');
+# print STDERR "CD Tracks: $cd_tracks\n";
+
+my $count_per_cd = $schema->resultset('Track')->
+    search({}, 
+           { 'select' => [ 'me.cd', { count => 'me.trackid', } ],
+             'as' =>     [ 'cd', 'cd_count' ],
+             'group_by' => ['me.cd'],
+#    [ 'me.cd', 'cd_count' ],
+           });
+
+while (my $cnt = $count_per_cd->next) {
+    is($cnt->get_column('cd_count'), 3, 'CDs per track ' . $cnt->get_column('cd'));
+#    print STDERR "CD: " . $cnt->get_column('cd') . " count: " . $cnt->get_column('cd_count') . "\n";
+}
+
+$count_per_cd->reset;
+while (my $trcnt = $count_per_cd->next) {
+#    print STDERR "CD: " . $trcnt->get_column('cd') . " count: " . $trcnt->get_column('cd_count') . "\n";
+    ok($trcnt->cd->title, 'Title for CD, fetched (' . $trcnt->get_column('cd') . ')');
+#    print STDERR "CD title: " . $trcnt->cd->title . "\n";
+}
+
+
+## This is the working sql for group/prefetch combo
+# my $stuff = $schema->storage->dbh_do(
+#    sub {
+#      my ($storage, $dbh) = @_;
+#      $dbh->selectall_arrayref("SELECT me.cd, me.count, cd.cdid, cd.artist, cd.title, cd.year, cd.genreid, cd.single_track FROM (SELECT me.cd, COUNT( me.trackid ) as count FROM track me GROUP BY me.cd) AS me JOIN cd cd ON cd.cdid = me.cd");
+#    },
+#);
+
+# print STDERR Data::Dumper::Dumper($stuff);
+
+{
+  my ($sql, @bind);
+  $schema->storage->debugobj(DBIC::DebugObj->new(\$sql, \@bind));
+  $schema->storage->debug(1);
+
+  my $count_per_prefetched = $count_per_cd->search({}, { prefetch => 'cd' });
+  is($count_per_prefetched->all, 5, 'Prefetched count with groupby');
+#  print STDERR "Tracks/CDs with prefetch, count: " . $count_per_prefetched->count . "\n";
+
+  is_same_sql_bind (
+    $sql,
+    \@bind,
+    "SELECT me.cd, me.count, cd.cdid, cd.artist, cd.title, cd.year, cd.genreid, cd.single_track FROM (SELECT me.cd, COUNT( me.trackid ) as count FROM track me GROUP BY me.cd) AS me JOIN cd cd ON cd.cdid = me.cd",
+    [ ],
+  );
+# }
+
+}