X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass.pm;h=4db8939bd470214d0233e07493bb5054f1c733f3;hb=1816be4f51709d94945380c0a65de80e5606b162;hp=c8d1d2e8b2b9d4faccae6eec37eafd35a0868336;hpb=a0638a7bb719844a0d5c264265a3a13b18d3318f;p=dbsrgits%2FDBIx-Class.git diff --git a/lib/DBIx/Class.pm b/lib/DBIx/Class.pm index c8d1d2e..4db8939 100644 --- a/lib/DBIx/Class.pm +++ b/lib/DBIx/Class.pm @@ -3,246 +3,343 @@ package DBIx::Class; use strict; use warnings; +use MRO::Compat; + use vars qw($VERSION); -use base qw/DBIx::Class::Componentised Class::Data::Accessor/; +use base qw/DBIx::Class::Componentised Class::Accessor::Grouped/; +use DBIx::Class::StartupCheck; + +sub mk_classdata { + shift->mk_classaccessor(@_); +} + +sub mk_classaccessor { + my $self = shift; + $self->mk_group_accessors('inherited', $_[0]); + $self->set_inherited(@_) if @_ > 1; +} -sub mk_classdata { shift->mk_classaccessor(@_); } sub component_base_class { 'DBIx::Class' } # Always remember to do all digits for the version even if they're 0 # i.e. first release of 0.XX *must* be 0.XX000. This avoids fBSD ports # brain damage and presumably various other packaging systems too -$VERSION = '0.05999_04'; +$VERSION = '0.08108'; + +$VERSION = eval $VERSION; # numify for warning-free dev releases sub MODIFY_CODE_ATTRIBUTES { - my ($class,$code,@attrs) = @_; - $class->mk_classdata('__attr_cache' => {}) unless $class->can('__attr_cache'); - $class->__attr_cache->{$code} = [@attrs]; - return (); + my ($class,$code,@attrs) = @_; + $class->mk_classdata('__attr_cache' => {}) + unless $class->can('__attr_cache'); + $class->__attr_cache->{$code} = [@attrs]; + return (); } sub _attr_cache { - my $self = shift; - my $cache = $self->can('__attr_cache') ? $self->__attr_cache : {}; - my $rest = eval { $self->next::method }; - return $@ ? $cache : { %$cache, %$rest }; + my $self = shift; + my $cache = $self->can('__attr_cache') ? $self->__attr_cache : {}; + my $rest = eval { $self->next::method }; + return $@ ? $cache : { %$cache, %$rest }; } 1; -=head1 NAME +=head1 NAME DBIx::Class - Extensible and flexible object <-> relational mapper. +=head1 GETTING HELP/SUPPORT + +The community can be found via: + + Mailing list: http://lists.scsys.co.uk/mailman/listinfo/dbix-class/ + + SVN: http://dev.catalyst.perl.org/repos/bast/DBIx-Class/ + + SVNWeb: http://dev.catalyst.perl.org/svnweb/bast/browse/DBIx-Class/ + + IRC: irc.perl.org#dbix-class + =head1 SYNOPSIS -Create a base schema class called DB/Main.pm: +Create a schema class called MyDB/Schema.pm: - package DB::Main; + package MyDB::Schema; use base qw/DBIx::Class::Schema/; - __PACKAGE__->load_classes(); + __PACKAGE__->load_namespaces(); 1; -Create a class the represent artists, who have many -CDs, in DB/Main/Artist.pm: +Create a table class to represent artists, who have many CDs, in +MyDB/Schema/Result/Artist.pm: - package DB::Main::Artist; + package MyDB::Schema::Result::Artist; use base qw/DBIx::Class/; - __PACKAGE__->load_components(qw/PK::Auto Core/); + __PACKAGE__->load_components(qw/Core/); __PACKAGE__->table('artist'); __PACKAGE__->add_columns(qw/ artistid name /); __PACKAGE__->set_primary_key('artistid'); - __PACKAGE__->has_many('cds' => 'DB::Main::CD'); + __PACKAGE__->has_many(cds => 'MyDB::Schema::Result::CD'); 1; -A class to represent a CD, which belongs to an -artist, in DB/Main/CD.pm: +A table class to represent a CD, which belongs to an artist, in +MyDB/Schema/Result/CD.pm: - package DB::Main::CD; + package MyDB::Schema::Result::CD; use base qw/DBIx::Class/; - __PACKAGE__->load_components(qw/PK::Auto Core/); + __PACKAGE__->load_components(qw/Core/); __PACKAGE__->table('cd'); - __PACKAGE__->add_columns(qw/ cdid artist title year/); + __PACKAGE__->add_columns(qw/ cdid artistid title year /); __PACKAGE__->set_primary_key('cdid'); - __PACKAGE__->belongs_to('artist' => 'DB::Main::Artist'); + __PACKAGE__->belongs_to(artist => 'MyDB::Schema::Artist', 'artistid'); 1; Then you can use these classes in your application's code: # Connect to your database. - my $ds = DB::Main->connect(@dbi_dsn); + 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. - my @all_artists = $ds->resultset('Artist')->all; - my $all_artists_rs = $ds->resultset('Artist'); + my @all_artists = $schema->resultset('Artist')->all; + my $all_artists_rs = $schema->resultset('Artist'); # Create a result set to search for artists. - # This does not query the DB, yet. - my $johns_rs = $ds->resultset('Artist')->search( + # This does not query the DB. + my $johns_rs = $schema->resultset('Artist')->search( # Build your WHERE using an SQL::Abstract structure: - { 'name' => { 'like', 'John%' } } + { name => { like => 'John%' } } ); - # Now the query is executed. + # Execute a joined query to get the cds. my @all_john_cds = $johns_rs->search_related('cds')->all; - # Queries but only fetches one row so far. + # 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' } ); - my $millenium_cds_rs = $ds->resultset('CD')->search( + # 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 = $millenium_cds_rs->next; # SELECT ... FROM cds JOIN artists ... - my $cd_artist_name = $cd->artist->name; # Already has the data so no query + 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 - my $new_cd = $ds->resultset('CD')->new({ title => 'Spoon' }); + # 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'); - $ds->txn_do(sub { $new_cd->update }); # Runs the update in a transaction + $schema->txn_do(sub { $new_cd->update }); # Runs the update in a transaction - $millenium_cds_rs->update({ year => 2002 }); # Single-query bulk update + # change the year of all the millennium CDs at once + $millennium_cds_rs->update({ year => 2002 }); =head1 DESCRIPTION This is an SQL to OO mapper with an object API inspired by L -(and a compatibility layer as a springboard for porting) and a resultset API +(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 and HAVING support. +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 when it actually needs to in order to return something the user's -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). +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. -This project is still under rapid development, so features added in the -latest major release may not work 100% yet - check the Changes if you run -into trouble, and beware of anything explicitly marked EXPERIMENTAL. Failing -test cases are *always* welcome and point releases are put out rapidly as -bugs are found and fixed. +=head1 WHERE TO GO NEXT -Even so, we do your best to maintain full backwards compatibility for published -APIs since DBIx::Class is used in production in a number of organisations; -the test suite is now fairly substantial and several developer releases are -generally made to CPAN before the -current branch is merged back to trunk. +L lists each task you might want help on, and +the modules where you will find documentation. -The community can be found via - +=head1 AUTHOR - Mailing list: http://lists.rawmode.org/mailman/listinfo/dbix-class/ +mst: Matt S. Trout - SVN: http://dev.catalyst.perl.org/repos/bast/trunk/DBIx-Class/ +(I mostly consider myself "project founder" these days but the AUTHOR heading +is traditional :) - Wiki: http://dbix-class.shadowcatsystems.co.uk/ +=head1 CONTRIBUTORS - IRC: irc.perl.org#dbix-class +abraxxa: Alexander Hartmaier -=head1 WHERE TO GO NEXT +aherzog: Adam Herzog -=over 4 +andyg: Andy Grundman -=item L - user's manual +ank: Andres Kievsky -=item L - DBIC Core Classes +arcanez: Justin Hunter -=item L - L Compat layer +ash: Ash Berlin -=item L - schema and connection container +bert: Norbert Csongradi -=item L - tables and table-like things +blblack: Brandon L. Black -=item L - encapsulates a query and its results +bluefeet: Aran Deltac -=item L - row-level methods +bricas: Brian Cassidy -=item L - primary key methods +caelum: Rafael Kitover -=item L - relationships between tables +castaway: Jess Robinson -=back +claco: Christopher H. Laco -=head1 AUTHOR +clkao: CL Kao -Matt S. Trout +da5id: David Jack Olrik -=head1 CONTRIBUTORS +debolaz: Anders Nor Berle + +dkubb: Dan Kubb + +dnm: Justin Wheeler + +dwc: Daniel Westermann-Clark + +dyfrgi: Michael Leuchtenburg + +frew: Arthur Axel "fREW" Schmidt -Alexander Hartmaier +gphat: Cory G Watson -Andy Grundman +groditi: Guillermo Roditi -Andres Kievsky +ilmari: Dagfinn Ilmari MannsEker -Brandon Black +jasonmay: Jason May -Brian Cassidy +jesper: Jesper Krogh -Christopher H. Laco +jgoulah: John Goulah -CL Kao +jguenther: Justin Guenther -Daisuke Murase +jnapiorkowski: John Napiorkowski -Dan Kubb +jon: Jon Schutz -Dan Sully +jshirley: J. Shirley -Daniel Westermann-Clark +konobi: Scott McWhirter -David Kamholz +lukes: Luke Saunders -Jesper Krogh +marcus: Marcus Ramberg -Jess Robinson +mattlaw: Matt Lawrence -Jules Bean +michaelr: Michael Reddick -Justin Guenther +ned: Neil de Carteret -Marcus Ramberg +nigel: Nigel Metheringham -Nigel Metheringham +ningu: David Kamholz -Paul Makepeace +Nniuq: Ron "Quinn" Straight" -Robert Sedlacek +norbi: Norbert Buchmuller -sc_ of irc.perl.org#dbix-class +Numa: Dan Sully -Scott McWhirter (konobi) +oyse: Øystein Torget -Scotty Allen +paulm: Paul Makepeace + +penguin: K J Cheetham + +perigrin: Chris Prather + +peter: Peter Collingbourne + +phaylon: Robert Sedlacek + +plu: Johannes Plunien + +quicksilver: Jules Bean + +rafl: Florian Ragwitz + +rdj: Ryan D Johnson + +ribasushi: Peter Rabbitson + +rjbs: Ricardo Signes + +robkinyon: Rob Kinyon + +sc_: Just Another Perl Hacker + +scotty: Scotty Allen + +semifor: Marc Mims + +solomon: Jared Johnson + +sszabo: Stephan Szabo + +teejay : Aaron Trevena Todd Lipcon -Will Hawes +Tom Hukins + +typester: Daisuke Murase + +victori: Victor Igumnov + +wdh: Will Hawes + +willert: Sebastian Willert + +wreis: Wallace Reis + +zamolxes: Bogdan Lucaciu =head1 LICENSE You may distribute this code under the same terms as Perl itself. =cut -