NAME DBIx::Class - Extensible and flexible object <-> relational mapper. GETTING HELP/SUPPORT The community can be found via: * Web Site: * IRC: irc.perl.org#dbix-class * Mailing list: * RT Bug Tracker: * gitweb: * git: * twitter SYNOPSIS Create a schema class called MyDB/Schema.pm: package MyDB::Schema; use base qw/DBIx::Class::Schema/; __PACKAGE__->load_namespaces(); 1; Create a result class to represent artists, who have many CDs, in MyDB/Schema/Result/Artist.pm: See DBIx::Class::ResultSource for docs on defining result classes. package MyDB::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 => 'MyDB::Schema::Result::CD'); 1; A result class to represent a CD, which belongs to an artist, in MyDB/Schema/Result/CD.pm: package MyDB::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 => 'MyDB::Schema::Result::Artist', 'artistid'); 1; Then you can use these classes in your application's code: # Connect to your database. use MyDB::Schema; my $schema = MyDB::Schema->connect($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 DBIx::Class::Row 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 }); DESCRIPTION This is an SQL to OO mapper with an object API inspired by Class::DBI (with a compatibility layer as a springboard for porting) and a resultset API that allows abstract encapsulation of database operations. It aims to make representing queries in your code as perl-ish as possible while still providing access to as many of the capabilities of the database as possible, including retrieving related records from multiple tables in a single query, JOIN, LEFT JOIN, COUNT, DISTINCT, GROUP BY, ORDER BY and HAVING support. DBIx::Class can handle multi-column primary and foreign keys, complex queries and database-level paging, and does its best to only query the database in order to return something you've directly asked for. If a resultset is used as an iterator it only fetches rows off the statement handle as requested in order to minimise memory usage. It has auto-increment support for SQLite, MySQL, PostgreSQL, Oracle, SQL Server and DB2 and is known to be used in production on at least the first four, and is fork- and thread-safe out of the box (although your DBD may not be). This project is still under rapid development, so large new features may be marked EXPERIMENTAL - such APIs are still usable but may have edge bugs. Failing test cases are *always* welcome and point releases are put out rapidly as bugs are found and fixed. We do our best to maintain full backwards compatibility for published APIs, since DBIx::Class is used in production in many organisations, and even backwards incompatible changes to non-published APIs will be fixed if they're reported and doing so doesn't cost the codebase anything. The test suite is quite substantial, and several developer releases are generally made to CPAN before the branch for the next release is merged back to trunk for a major release. WHERE TO GO NEXT DBIx::Class::Manual::DocMap lists each task you might want help on, and the modules where you will find documentation. AUTHOR mst: Matt S. Trout (I mostly consider myself "project founder" these days but the AUTHOR heading is traditional :) CONTRIBUTORS abraxxa: Alexander Hartmaier aherzog: Adam Herzog Alexander Keusch alnewkirk: Al Newkirk amiri: Amiri Barksdale amoore: Andrew Moore andyg: Andy Grundman ank: Andres Kievsky arc: Aaron Crane arcanez: Justin Hunter ash: Ash Berlin bert: Norbert Csongradi blblack: Brandon L. Black bluefeet: Aran Deltac boghead: Bryan Beeley bricas: Brian Cassidy brunov: Bruno Vecchi caelum: Rafael Kitover castaway: Jess Robinson claco: Christopher H. Laco clkao: CL Kao da5id: David Jack Olrik debolaz: Anders Nor Berle dew: Dan Thomas dkubb: Dan Kubb dnm: Justin Wheeler dpetrov: Dimitar Petrov dwc: Daniel Westermann-Clark dyfrgi: Michael Leuchtenburg freetime: Bill Moseley frew: Arthur Axel "fREW" Schmidt goraxe: Gordon Irving gphat: Cory G Watson groditi: Guillermo Roditi Haarg: Graham Knop hobbs: Andrew Rodland ilmari: Dagfinn Ilmari Mannsåker initself: Mike Baas jasonmay: Jason May jesper: Jesper Krogh jgoulah: John Goulah jguenther: Justin Guenther jhannah: Jay Hannah jnapiorkowski: John Napiorkowski jon: Jon Schutz jshirley: J. Shirley kaare: Kaare Rasmussen konobi: Scott McWhirter lukes: Luke Saunders marcus: Marcus Ramberg mattlaw: Matt Lawrence michaelr: Michael Reddick ned: Neil de Carteret nigel: Nigel Metheringham ningu: David Kamholz Nniuq: Ron "Quinn" Straight" norbi: Norbert Buchmuller nuba: Nuba Princigalli Numa: Dan Sully ovid: Curtis "Ovid" Poe oyse: Øystein Torget paulm: Paul Makepeace penguin: K J Cheetham perigrin: Chris Prather peter: Peter Collingbourne phaylon: Robert Sedlacek plu: Johannes Plunien Possum: Daniel LeWarne quicksilver: Jules Bean rafl: Florian Ragwitz rainboxx: Matthias Dietrich rbo: Robert Bohne rbuels: Robert Buels rdj: Ryan D Johnson ribasushi: Peter Rabbitson rjbs: Ricardo Signes robkinyon: Rob Kinyon Roman: Roman Filippov sc_: Just Another Perl Hacker scotty: Scotty Allen semifor: Marc Mims solomon: Jared Johnson spb: Stephen Bennett Squeeks sszabo: Stephan Szabo teejay : Aaron Trevena Todd Lipcon Tom Hukins tonvoon: Ton Voon triode: Pete Gamache typester: Daisuke Murase victori: Victor Igumnov wdh: Will Hawes willert: Sebastian Willert wreis: Wallace Reis yrlnry: Mark Jason Dominus zamolxes: Bogdan Lucaciu COPYRIGHT Copyright (c) 2005 - 2010 the DBIx::Class "AUTHOR" and "CONTRIBUTORS" as listed above. LICENSE This library is free software and may be distributed under the same terms as perl itself.