I wrote this simple PHP trait to adapt Eloquent to handle composite keys: <?php namespace App\Model\Traits; // *** Adjust this to match your model namespace! *** use Illuminate\Database\Eloquent\Builder; trait HasCompositePrimaryKey { /** * Get the value indicating whether the IDs are incrementing. * * @return bool */ public function getIncrementing() { return false; } /** … Read more
I would use a composite (multi-column) key. CREATE TABLE INFO ( t1ID INT, t2ID INT, PRIMARY KEY (t1ID, t2ID) ) This way you can have t1ID and t2ID as foreign keys pointing to their respective tables as well.
A Table can have a Composite Primary Key which is a primary key made from two or more columns. For example: CREATE TABLE userdata ( userid INT, userdataid INT, info char(200), primary key (userid, userdataid) ); Update: Here is a link with a more detailed description of composite primary keys.