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';
23 sub _table_uniq_info {
24 my ($self, $table) = @_;
26 # ... get UNIQUE info for $table somehow
27 # and return a data structure that looks like this:
30 [ 'keyname' => [ 'colname' ] ],
31 [ 'keyname2' => [ 'col1name', 'col2name' ] ],
32 [ 'keyname3' => [ 'colname' ] ],
35 # Where the "keyname"'s are just unique identifiers, such as the
36 # name of the unique constraint, or the names of the columns involved
37 # concatenated if you wish.
44 The only required method for new subclasses is C<_table_uniq_info>,
45 as I have not to date found any pseudo-standardized or DBD-agnostic
46 way for obtaining this information.
48 The base DBI Loader contains generic methods that *should* work for
49 everything else in theory, although in practice some DBDs need to
50 override one or more of the other methods. The other methods one might
51 likely want to override are: C<_table_pk_info>, C<_table_fk_info>, and
52 C<_tables_list>. See the included DBD drivers for examples of these.