Eloquent relation pivot table with table

I read the laravel documentation but I couldn’t understand very well. I have this structure on my database.

PriceTable – which contains info about the period of promotional prices and the default price.

Product – which contains info about products.

and PriceTable_Product – which contains the foreign keys of Product and PriceTable and the respective price.

Example:

PriceTable        |  PriceTable_Product                 |  Product
id |  description |  PriceTable_id | Product_id | price |  product_id| name  
1  |  default     |    1           |    1       | 5.00  |   1        | test
2  |  promotional |    2           |    1       | 3.50  |

And at the Order table I can have multiples products, so I want to know if it is possible to relation Order table, with the pivot table PriceTable_Product, because I need the information of which table belongs the price when the product was sold.

Answer

First of all you may define the relations between Product and PriceTable.

Product model (AppProduct.php)

<?php

namespace App;

class Product extends Model {
    protected $table = 'products';
    //if the default primary key isn't 'id' you may use $primaryKey
    protected $primaryKey = 'product_id';
    public function pricetables() {
        return $this->belongsToMany('AppPriceTable');
    }
}

PriceTable model (AppPriceTable.php)

<?php

namespace App;

class PriceTable extends Model {
    protected $table = 'pricetable';
    public function products() {
        return $this->belongsToMany('AppProduct');
    }
}

If you created the relations then you can use:

$product = AppProduct::find(1);

foreach ($product->pricetables as $pricetable) {
    echo $pricetable->pivot->description;
}