public function run()
 {
     $faker = Faker::create();
     $items = Item::lists('id');
     $orders = Order::lists('id');
     foreach ($orders as $order) {
         $itemsUsed = [];
         foreach (range(1, $faker->numberBetween(1, 10)) as $index) {
             $itemId = $items[$index];
             if (!in_array($itemId, $itemsUsed)) {
                 ItemOrder::create(['order_id' => $order, 'item_id' => $itemId, 'quantity' => $faker->numberBetween(0, 5)]);
             }
             $itemsUsed[] = $itemId;
         }
     }
 }