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 and the model linked must implement Twinnable behaviour.
| 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. |
| 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. | |
| column_context_common_id_to: | |
| Calculated from the behaviour Twinnable. | |
| column_context_to: | |
| Calculated from the behaviour Twinnable. | |
| column_context_is_main_to: | |
| Calculated from the behaviour Twinnable. | |