如何对集合中的每条记录执行计算

Posted 2023-02-16

【中文标题】如何对集合中的每条记录执行计算

【英文标题】：how to perform calculations for each record in collection

【发布时间】：2022-01-11 17:12:40

【问题描述】：

我有一组赌注，我需要计算 var $profit。 每条记录都有赌注和赔率。

这是我的收藏：

Illuminate\Database\Eloquent\Collection #1900 ▼
  #items: array:4 [▼
    0 => App\Models\Bet #1912 ▶
    1 => App\Models\Bet #1906 ▶
    2 => App\Models\Bet #1857 ▶
    3 => App\Models\Bet #1882 ▶
  ]

和数组的属性：

#attributes: array:19 [▼
        "id" => 4
        "user_id" => 1
        "status_id" => 1
        "content" => "some text"
        "sport" => "Basketball"
        "competition" => "Premier league"
        "start_date" => "2021-12-08"
        "bookmaker_id" => 1
        "team1" => "team one"
        "team2" => "team two"
        "selection_id" => 1
        "tip" => "2,5"
        "odds" => "5"
        "unit_id" => 5
        "created_at" => "2021-12-06 13:32:46"
        "updated_at" => "2021-12-06 13:32:46"
        "created_by" => 1
        "updated_by" => null
        "deleted_by" => null
      ]

如何在每个集合数组中进行计算？ 例如计算利润（odds*unit_id(stake)）

【问题讨论】：

使用集合map 方法。或者你可以使用accessors

你可以local scope

【参考方案1】：

这是我需要的东西：

$bets = array_map(function($item) 
     $item['won'] = number_format((double)$item['odds'] * (int)$item['unit_id'],3);
            return $item;
        , $bets);