1 package DBIx::Class::Schema::Loader::DBI::Writing;
10 DBIx::Class::Schema::Loader::DBI::Writing - Loader subclass writing guide for DBI
14 package DBIx::Class::Schema::Loader::DBI::Foo;
16 # THIS IS JUST A TEMPLATE TO GET YOU STARTED.
20 use base 'DBIx::Class::Schema::Loader::DBI';
21 use Carp::Clan qw/^DBIx::Class/;
24 sub _table_uniq_info {
25 my ($self, $table) = @_;
27 # ... get UNIQUE info for $table somehow
28 # and return a data structure that looks like this:
31 [ 'keyname' => [ 'colname' ] ],
32 [ 'keyname2' => [ 'col1name', 'col2name' ] ],
33 [ 'keyname3' => [ 'colname' ] ],
36 # Where the "keyname"'s are just unique identifiers, such as the
37 # name of the unique constraint, or the names of the columns involved
38 # concatenated if you wish.
45 The only required method for new subclasses is C<_table_uniq_info>,
46 as there is not (yet) any standardized, DBD-agnostic way for obtaining
47 this information from DBI.
49 The base DBI Loader contains generic methods that *should* work for
50 everything else in theory, although in practice some DBDs need to
51 override one or more of the other methods. The other methods one might
52 likely want to override are: C<_table_pk_info>, C<_table_fk_info>, and
53 C<_tables_list>. See the included DBD drivers for examples of these.