Laravel 集合 Get 方法未按预期工作

Question

我在 php artisan tinker 中尝试了以下方法：

  >>>  $contract = \App\ContractHour::where('user_id', '=', 14)->get();
  =>  Illuminate\Database\Eloquent\Collection {#747
        all: [...]
      }

  >>>  $contract->where('day_of_wk', 1);
  => Illuminate\Database\Eloquent\Collection {#719
       all: [
         App\ContractHour {#726
           user_id: 14,
           day_of_wk: 1,
           start_time: "09:00:00",
           end_time: "05:00:00",
           break_time: "01:00:00",
           created_at: "2016-01-09 17:49:22",
           updated_at: "2016-01-09 17:49:22",
         },
       ],
     }
  >>> $contract->where('day_of_wk', 1)->get('start_time');
  => null

明明 start_time 存在，为什么 get 方法返回 null？

Answer 1

您错误地使用了 get() 方法。它的作用是 returns 一个集合，如果您只需要一个符合您条件的项目，请尝试使用 first() 代替。

$contract->where('day_of_wk', 1)->first()->start_time; //outputs 09:00:00

Laravel 集合 Get 方法未按预期工作

Laravel Collection Get method not working as expected

php

laravel-5.1

laravel-collection