Sort By with function on collection laravel-CodePudding

I would like some help on this, i have a table like this

CREATE TABLE IF NOT EXISTS `items` (
  `id` int(10) UNSIGNED NOT NULL AUTO_INCREMENT,
   `code` varchar(20) COLLATE utf8_unicode_ci DEFAULT NULL,
    `unitPrice` decimal(8,2) NOT NULL,
  `quantity` int(11) NOT NULL,
  `totalSold` int(11) DEFAULT NULL,
   `created_at` timestamp NULL DEFAULT NULL,
  `updated_at` timestamp NULL DEFAULT NULL,
  PRIMARY KEY (`id`),
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

and after using DB::table('items')->get(); i would like to get the same result as if i run this sql command

"select `code`,(`unitPrice`*(`quantity` `totalSold`)) as totalEarnIfsold from `items` order by `totalEarnIfsold` desc"

what i have been able to achieve without success ofc is this:

    $items_all->sortBy([
          $totalEarnIfsold=  fn ($a) => $a->unitPrice *($a->quantity $a->totalSold),
          ['totalEarnIfsold', 'desc'],           
        ]);

So i need your help if you may ofc, and thanks

CodePudding user response：

You can do in following way

First you need to calculate totalEarnIfsold with map function and after that you can easily sort with value.

$items_all = $items_all->map(function($item) {
        $item->totalEarnIfsold = $item->unitPrice *($item->quantity   $item->totalSold);
        return $item;
        })->sortByDesc('totalEarnIfsold');