Twinnable Many to Many

The twinnable_many_many relation is the equivalent of the FuelPHP native many_many relation (moreover, it extends many_many). The difference is that the link is not made on primary keys but on context common IDs.

If you use the twinnable_many_many relation, the model must implement Twinnable behaviour.

Changed in version 4.2: Before the 4.2 (Dubrovka) version, the linked model also need to implement Twinnable behaviour.

See also

• Twinnable behaviour
• Multi-Contexts.
• FuelPHP native many_many

Configuration

key_from:The key used for the relation in the current model model_to:The full class name of the target model. Calculated from alias. key_to:Calculated from the behaviour Twinnable if model_to is twinnable. table_through:This is the table that connects the 2 models and has both their common IDs in it. key_through_from:  The key that matches the current model’s common ID. key_through_to:The key that matches the related model’s common ID. column_context_from:  Calculated from the behaviour Twinnable if model_to is twinnable. column_context_common_id_to:  Calculated from the behaviour Twinnable if model_to is twinnable. column_context_to:  Calculated from the behaviour Twinnable if model_to is twinnable. column_context_is_main_to:  Calculated from the behaviour Twinnable if model_to is twinnable.

Use

When you use the relation in a find, you can add main context in conditions. If it’s set to false, relation only retrieves related items of the same context.

<?php
Model_Example::find('all', array(
    'related' => array(
        'manymany_twinnable' => array(
            'main_context' => false,
        ),
    ),
);