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我在 php artisan tinker 中尝试了以下内容:

  >>>  $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

为什么 get 方法在明确start_time存在时返回 null?

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1 回答 1

2

您错误地使用了 get() 方法。它的作用是返回一个集合,如果您只需要一个符合您的条件的项目,然后尝试使用 first() 代替。

$contract->where('day_of_wk', 1)->first()->start_time; //outputs 09:00:00
于 2016-01-09T22:44:47.737 回答