Since a product_accessory_adaptor relates to a product and a catagory, why don't you create a ProductAccessoryAdaptor model with two belongs to relationships ?

hi pmall, the ProductAccessoryAdaptor model would not have a direct foreign key..Could you advise how is that doable? I've updated my question as well with regards on what i've achieved so far.

Why is this not suited ?

Schema::create('product_accessory_adaptor', function(Blueprint $table)
{
    $table->increments('id');
    $table->integer('product_id')->unsigned();
    $table->integer('accessory_id')->unsigned();
    // more fields...
    $table->foreign('product_id')->references('id')->on('accessories');
    $table->foreign('accessory_id')->references('id')->on('accessories');
}

then

class Adaptor extends Eloquent {

    protected $table = 'product_accessory_adaptor';

    public function products() {
        return $this->belongsTo('Product');
    }

    public function accessories() {
        return $this->belongsTo('Accessory');
    }
}