1 package Catalyst::Model::DBIC::Schema;
8 use base qw/Catalyst::Model Class::Accessor::Fast Class::Data::Accessor/;
10 use UNIVERSAL::require;
15 __PACKAGE__->mk_classaccessor('composed_schema');
16 __PACKAGE__->mk_accessors('schema');
20 Catalyst::Model::DBIC::Schema - DBIx::Class::Schema Model Class
24 Manual creation of a DBIx::Class::Schema and a Catalyst::Model::DBIC::Schema:
30 Create the DBIx:Class schema in MyApp/Schema/FilmDB.pm:
32 package MyApp::Schema::FilmDB;
33 use base qw/DBIx::Class::Schema/;
35 __PACKAGE__->load_classes(qw/Actor Role/);
39 Create some classes for the tables in the database, for example an
40 Actor in MyApp/Schema/FilmDB/Actor.pm:
42 package MyApp::Schema::FilmDB::Actor;
43 use base qw/DBIx::Class/
45 __PACKAGE__->load_components(qw/Core/);
46 __PACKAGE__->table('actor');
50 and a Role in MyApp/Schema/Role.pm:
52 package MyApp::Schema::FilmDB::Role;
53 use base qw/DBIx::Class/
55 __PACKAGE__->load_components(qw/Core/);
56 __PACKAGE__->table('role');
60 Notice that the schema is in MyApp::Schema, not in MyApp::Model. This way it's
61 usable as a standalone module and you can test/run it without Catalyst.
65 To expose it to Catalyst as a model, you should create a DBIC Model in
66 MyApp/Model/FilmDB.pm:
68 package MyApp::Model::FilmDB;
69 use base qw/Catalyst::Model::DBIC::Schema/;
72 schema_class => 'MyApp::Schema::FilmDB',
81 See below for a full list of the possible config parameters.
85 Now you have a working Model, accessing your separate DBIC Schema. Which can
86 be used/accessed in the normal Catalyst manner, via $c->model():
88 my $actor = $c->model('FilmDB::Actor')->find(1);
90 You can also use it to set up DBIC authentication with
91 Authentication::Store::DBIC in MyApp.pm:
95 use Catalyst qw/... Authentication::Store::DBIC/;
99 __PACKAGE__->config->{authentication}{dbic} = {
100 user_class => 'FilmDB::Actor',
101 user_field => 'name',
102 password_field => 'password'
105 C<< $c->model() >> returns a L<DBIx::Class::ResultSet> for the source name
106 parameter passed. To find out more about which methods can be called on a
107 ResultSet, or how to add your own methods to it, please see the ResultSet
108 documentation in the L<DBIx::Class> distribution.
110 Some examples are given below:
112 # to access schema methods directly:
113 $c->model('FilmDB')->schema->source(...);
115 # to access the source object, resultset, and class:
116 $c->model('FilmDB')->source(...);
117 $c->model('FilmDB')->resultset(...);
118 $c->model('FilmDB')->class(...);
120 # For resultsets, there's an even quicker shortcut:
121 $c->model('FilmDB::Actor')
122 # is the same as $c->model('FilmDB')->resultset('Actor')
124 # To get the composed schema for making new connections:
125 my $newconn = $c->model('FilmDB')->composed_schema->connect(...);
127 # Or the same thing via a convenience shortcut:
128 my $newconn = $c->model('FilmDB')->connect(...);
130 # or, if your schema works on different storage drivers:
131 my $newconn = $c->model('FilmDB')->composed_schema->clone();
132 $newconn->storage_type('::LDAP');
133 $newconn->connection(...);
135 # and again, a convenience shortcut
136 my $newconn = $c->model('FilmDB')->clone();
137 $newconn->storage_type('::LDAP');
138 $newconn->connection(...);
142 This is a Catalyst Model for L<DBIx::Class::Schema>-based Models. See
143 the documentation for L<Catalyst::Helper::Model::DBIC::Schema> for
144 information on generating these Models via Helper scripts.
146 =head1 CONFIG PARAMETERS
152 This is the classname of your L<DBIx::Class::Schema> Schema. It needs
153 to be findable in C<@INC>, but it does not need to be inside the
154 C<Catalyst::Model::> namespace. This parameter is required.
158 This is an arrayref of connection parameters, which are specific to your
159 C<storage_type> (see your storage type documentation for more details).
161 This is not required if C<schema_class> already has connection information
162 defined inside itself (which isn't highly recommended, but can be done)
164 For L<DBIx::Class::Storage::DBI>, which is the only supported
165 C<storage_type> in L<DBIx::Class> at the time of this writing, the
166 parameters are your dsn, username, password, and connect options hashref.
168 See L<DBIx::Class::Storage::DBI/connect_info> for a detailed explanation
169 of the arguments supported.
173 connect_info => [ 'dbi:Pg:dbname=mypgdb', 'postgres', '' ],
176 'dbi:SQLite:dbname=foo.db',
179 'PRAGMA synchronous = OFF',
185 'dbi:Pg:dbname=mypgdb',
191 'some SQL statement',
192 'another SQL statement',
199 Allows the use of a different C<storage_type> than what is set in your
200 C<schema_class> (which in turn defaults to C<::DBI> if not set in current
201 L<DBIx::Class>). Completely optional, and probably unnecessary for most
202 people until other storage backends become available for L<DBIx::Class>.
212 Instantiates the Model based on the above-documented ->config parameters.
213 The only required parameter is C<schema_class>. C<connect_info> is
214 required in the case that C<schema_class> does not already have connection
215 information defined for it.
219 Accessor which returns the connected schema being used by the this model.
220 There are direct shortcuts on the model class itself for
221 schema->resultset, schema->source, and schema->class.
223 =item composed_schema
225 Accessor which returns the composed schema, which has no connection info,
226 which was used in constructing the C<schema> above. Useful for creating
227 new connections based on the same schema/model. There are direct shortcuts
228 from the model object for composed_schema->clone and composed_schema->connect
232 Shortcut for ->composed_schema->clone
236 Shortcut for ->composed_schema->connect
240 Shortcut for ->schema->source
244 Shortcut for ->schema->class
248 Shortcut for ->schema->resultset
252 Provides an accessor for the connected schema's storage object.
253 Used often for debugging and controlling transactions.
260 my $self = shift->NEXT::new(@_);
262 my $class = ref($self);
263 my $model_name = $class;
264 $model_name =~ s/^[\w:]+::(?:Model|M):://;
266 croak "->config->{schema_class} must be defined for this model"
267 unless $self->{schema_class};
269 my $schema_class = $self->{schema_class};
271 $schema_class->require
272 or croak "Cannot load schema class '$schema_class': $@";
274 if( !$self->{connect_info} ) {
275 if($schema_class->storage && $schema_class->storage->connect_info) {
276 $self->{connect_info} = $schema_class->storage->connect_info;
279 croak "Either ->config->{connect_info} must be defined for $class"
280 . " or $schema_class must have connect info defined on it"
281 . "Here's what we got:\n"
286 $self->composed_schema($schema_class->compose_namespace($class));
287 $self->schema($self->composed_schema->clone);
289 $self->schema->storage_type($self->{storage_type})
290 if $self->{storage_type};
292 $self->schema->connection(@{$self->{connect_info}});
295 foreach my $moniker ($self->schema->sources) {
296 my $classname = "${class}::$moniker";
297 *{"${classname}::ACCEPT_CONTEXT"} = sub {
299 shift->model($model_name)->resultset($moniker);
306 sub clone { shift->composed_schema->clone(@_); }
308 sub connect { shift->composed_schema->connect(@_); }
310 sub storage { shift->schema->storage(@_); }
314 General Catalyst Stuff:
316 L<Catalyst::Manual>, L<Catalyst::Test>, L<Catalyst::Request>,
317 L<Catalyst::Response>, L<Catalyst::Helper>, L<Catalyst>,
319 Stuff related to DBIC and this Model style:
321 L<DBIx::Class>, L<DBIx::Class::Schema>,
322 L<DBIx::Class::Schema::Loader>, L<Catalyst::Helper::Model::DBIC::Schema>
326 Brandon L Black, C<blblack@gmail.com>
330 This program is free software, you can redistribute it and/or modify it
331 under the same terms as Perl itself.