On 10/24/06, Graham Barr <[EMAIL PROTECTED]> wrote:
> create table user_connections (
> id int unsigned not null auto_increment primary key,
> from_id int unsigned not null,
> to_id int unsigned not null,
> type enum('neighbor', 'friend', 'family'),
> unique key (from_id, to_id),
> key (to_id),
> constraint foreign key (from_id) REFERENCES users(id),
> constraint foreign key (to_id) REFERENCES users(id)
> ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
>
> The problem is that by default RDBO creates the metadata like
>
> foreign_keys => [
> user => {
> class => 'MyClass::User',
> key_columns => {
> from_id => 'id',
> to_id => 'id',
> },
> },
> ],
>
> Which does not look right.
Here's what it looks like after I've removed
foreign_key_name_generator() and fixed the MySQL 5.0.6+ bug:
foreign_keys => [
user => {
class => 'My::User',
key_columns => { from_id => 'id' },
},
user_obj => {
class => 'My::User',
key_columns => { to_id => 'id' },
},
],
Due to the way the tables are named (users and user_connections) RDBO
also detects and sets up many-to-many relationships in the My::User
class:
relationships => [
user_objs => {
column_map => { from_id => 'id' },
foreign_class => 'My::User',
map_class => 'My::UserConnection',
map_from => 'user',
map_to => 'user_obj',
type => 'many to many',
},
users => {
column_map => { to_id => 'id' },
foreign_class => 'My::User',
map_class => 'My::UserConnection',
map_from => 'user_obj',
map_to => 'user',
type => 'many to many',
},
],
The fk an drelationship names are determined by
auto_foreign_key_name() and auto_relationship_name_many_to_many(),
respectively, both of which are in the ConventionManager. I think
it's a reasonable solution (even if the results are not exactly pretty
in the scenario above) and straightforward to customize in a single
place (the CM), so I'm going to go with this solution unless there are
any objections (and assuming the test suite still passes ;)
-John
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