1 package DBIx::Class::DB;
6 use base qw/DBIx::Class/;
7 use DBIx::Class::Schema;
8 use DBIx::Class::Storage::DBI;
9 use DBIx::Class::ClassResolver::PassThrough;
11 use Scalar::Util 'blessed';
14 unless ($INC{"DBIx/Class/CDBICompat.pm"}) {
15 warn "IMPORTANT: DBIx::Class::DB is DEPRECATED AND *WILL* BE REMOVED. DO NOT USE.\n";
18 __PACKAGE__->load_components(qw/ResultSetProxy/);
22 *dbi_commit = \&txn_commit;
23 *dbi_rollback = \&txn_rollback;
26 sub storage { shift->schema_instance(@_)->storage; }
30 DBIx::Class::DB - (DEPRECATED) classdata schema component
34 This class is designed to support the Class::DBI connection-as-classdata style
35 for DBIx::Class. You are *strongly* recommended to use a DBIx::Class::Schema
36 instead; DBIx::Class::DB will not undergo new development and will be moved
37 to being a CDBICompat-only component before 1.0. In order to discourage further
38 use, documentation has been removed as of 0.08000
40 =begin HIDE_BECAUSE_THIS_CLASS_IS_DEPRECATED
46 Sets or gets the storage backend. Defaults to L<DBIx::Class::Storage::DBI>.
52 Sets or gets the class to use for resolving a class. Defaults to
53 L<DBIx::Class::ClassResolver::Passthrough>, which returns whatever you give
54 it. See resolve_class below.
58 __PACKAGE__->mk_classdata('class_resolver' =>
59 'DBIx::Class::ClassResolver::PassThrough');
63 __PACKAGE__->connection($dsn, $user, $pass, $attrs);
65 Specifies the arguments that will be passed to DBI->connect(...) to
66 instantiate the class dbh when required.
71 my ($class, @info) = @_;
72 $class->setup_schema_instance unless $class->can('schema_instance');
73 $class->schema_instance->connection(@info);
76 =head2 setup_schema_instance
78 Creates a class method ->schema_instance which contains a DBIx::Class::Schema;
79 all class-method operations are proxies through to this object. If you don't
80 call ->connection in your DBIx::Class::DB subclass at load time you *must*
81 call ->setup_schema_instance in order for subclasses to find the schema and
82 register themselves with it.
86 sub setup_schema_instance {
89 bless $schema, 'DBIx::Class::Schema';
90 $class->mk_classdata('schema_instance' => $schema);
95 Begins a transaction (does nothing if AutoCommit is off).
99 sub txn_begin { shift->schema_instance->txn_begin(@_); }
103 Commits the current transaction.
107 sub txn_commit { shift->schema_instance->txn_commit(@_); }
111 Rolls back the current transaction.
115 sub txn_rollback { shift->schema_instance->txn_rollback(@_); }
119 Executes a block of code transactionally. If this code reference
120 throws an exception, the transaction is rolled back and the exception
121 is rethrown. See L<DBIx::Class::Schema/"txn_do"> for more details.
125 sub txn_do { shift->schema_instance->txn_do(@_); }
131 warn "resolve_class deprecated as of 0.04999_02" unless $warn++;
132 return shift->class_resolver->class(@_);
136 =head2 resultset_instance
138 Returns an instance of a resultset for this class - effectively
139 mapping the L<Class::DBI> connection-as-classdata paradigm into the
140 native L<DBIx::Class::ResultSet> system.
144 sub resultset_instance {
145 $_[0]->result_source_instance->resultset
148 =head2 result_source_instance
150 Returns an instance of the result source for this class
154 __PACKAGE__->mk_classdata('_result_source_instance' => []);
156 # Yep. this is horrific. Basically what's happening here is that
157 # (with good reason) DBIx::Class::Schema copies the result source for
158 # registration. Because we have a retarded setup order forced on us we need
159 # to actually make our ->result_source_instance -be- the source used, and we
160 # need to get the source name and schema into ourselves. So this makes it
163 sub _maybe_attach_source_to_schema {
164 my ($class, $source) = @_;
165 if (my $meth = $class->can('schema_instance')) {
166 if (my $schema = $class->$meth) {
167 $schema->register_class($class, $class);
168 my $new_source = $schema->source($class);
169 %$source = %$new_source;
170 $schema->source_registrations->{$class} = $source;
175 sub result_source_instance {
177 $class = ref $class || $class;
181 $class->_result_source_instance([$source, $class]);
182 $class->_maybe_attach_source_to_schema($source);
186 my($source, $result_class) = @{$class->_result_source_instance};
187 return unless blessed $source;
189 if ($result_class ne $class) { # new class
190 # Give this new class its own source and register it.
191 $source = $source->new({
193 source_name => $class,
194 result_class => $class
196 $class->_result_source_instance([$source, $class]);
197 $class->_maybe_attach_source_to_schema($source);
206 See L<class_resolver>
212 Alias for L<txn_commit>
218 Alias for L<txn_rollback>
220 =end HIDE_BECAUSE_THIS_CLASS_IS_DEPRECATED
224 Matt S. Trout <mst@shadowcatsystems.co.uk>
228 You may distribute this code under the same terms as Perl itself.