NAME

module:

package MyApp::Schema;
use base qw/DBIx::Class::Schema/;

__PACKAGE__->load_namespaces();

1;
package MyApp::Schema::Result::Artist;
use base qw/DBIx::Class::Core/;

__PACKAGE__->table('artist');
__PACKAGE__->add_columns(qw/ artistid name /);
__PACKAGE__->set_primary_key('artistid');
__PACKAGE__->has_many(cds => 'MyApp::Schema::Result::CD', 'artistid');

1;
package MyApp::Schema::Result::CD;
use base qw/DBIx::Class::Core/;

__PACKAGE__->load_components(qw/InflateColumn::DateTime/);
__PACKAGE__->table('cd');
__PACKAGE__->add_columns(qw/ cdid artistid title year /);
__PACKAGE__->set_primary_key('cdid');
__PACKAGE__->belongs_to(artist => 'MyApp::Schema::Result::Artist', 'artistid');

1;
# Connect to your database.
use MyApp::Schema;
my $schema = MyApp::Schema->connect($dbi_dsn, $user, $pass, \%dbi_params);

# Query for all artists and put them in an array,
# or retrieve them as a result set object.
# $schema->resultset returns a DBIx::Class::ResultSet
my @all_artists = $schema->resultset('Artist')->all;
my $all_artists_rs = $schema->resultset('Artist');

# Output all artists names
# $artist here is a DBIx::Class::Row, which has accessors
# for all its columns. Rows are also subclasses of your Result class.
foreach $artist (@all_artists) {
  print $artist->name, "\n";
}

# Create a result set to search for artists.
# This does not query the DB.
my $johns_rs = $schema->resultset('Artist')->search(
  # Build your WHERE using an SQL::Abstract structure:
  { name => { like => 'John%' } }
);

# Execute a joined query to get the cds.
my @all_john_cds = $johns_rs->search_related('cds')->all;

# Fetch the next available row.
my $first_john = $johns_rs->next;

# Specify ORDER BY on the query.
my $first_john_cds_by_title_rs = $first_john->cds(
  undef,
  { order_by => 'title' }
);

# Create a result set that will fetch the artist data
# at the same time as it fetches CDs, using only one query.
my $millennium_cds_rs = $schema->resultset('CD')->search(
  { year => 2000 },
  { prefetch => 'artist' }
);

my $cd = $millennium_cds_rs->next; # SELECT ... FROM cds JOIN artists ...
my $cd_artist_name = $cd->artist->name; # Already has the data so no 2nd query

# new() makes a Result object but doesnt insert it into the DB.
# create() is the same as new() then insert().
my $new_cd = $schema->resultset('CD')->new({ title => 'Spoon' });
$new_cd->artist($cd->artist);
$new_cd->insert; # Auto-increment primary key filled in after INSERT
$new_cd->title('Fork');

$schema->txn_do(sub { $new_cd->update }); # Runs the update in a transaction

# change the year of all the millennium CDs at once
$millennium_cds_rs->update({ year => 2002 });
cpanm DBIx::Class
perl -MCPAN -e shell
install DBIx::Class

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Schema classes preparation

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NAME

WHERE TO START READING

GETTING HELP/SUPPORT

SYNOPSIS

Schema classes preparation

API usage

DESCRIPTION

HOW TO CONTRIBUTE

AUTHORS

CAT HERDERS

COPYRIGHT AND LICENSE

Module Install Instructions