Laravel Eloquent “调用未定义的关系”答案

【问题标题】：Laravel Eloquent "Call to undefined relationship"Laravel Eloquent “调用未定义的关系”
【发布时间】：2020-12-14 16:36:45
【问题描述】：

我正在尝试在 Laravel 中建立关系。

Survey.php：

namespace App;

use Illuminate\Database\Eloquent\Model;

class Survey extends Model
{
    public function survey_questions()
    {
        return $this->hasMany(SurveyQuestion::class);
    }
}

还有 SurveyQuestion.php 模型：

namespace App;

use Illuminate\Database\Eloquent\Model;

class SurveyQuestion extends Model
{
    public function survey()
    {
        return $this->belongsTo(Survey::class);
    }
}

这种关系以一种方式起作用：

>>>$a = SurveyQuestion::with('survey')->get();
=> Illuminate\Database\Eloquent\Collection {#2953
     all: [
       App\SurveyQuestion {#2931
         id: 1,
         survey_id: 2,
         question_id: 1,
         survey: App\Survey {#2967
           id: 2,
           name: "Survey 2",
           created_at: "2020-08-20 18:17:45",
           updated_at: "2020-08-20 18:17:45",
           status: "active",
         },
       },
...

但在尝试其他模型时会导致错误：

>>> $a = Survey::with('survey_questions')->get();
Illuminate/Database/Eloquent/RelationNotFoundException with message 'Call to undefined relationship [survey_questions] on model [App/Survey].'

我错过了什么？蒂亚！

【问题讨论】：

标签： laravel eloquent relationship

【解决方案1】：

使用提供的信息，我无法重现您的问题。事实上，它确实会返回带有问题的调查。

>>> Survey::with('survey_questions')->get();
=> Illuminate\Database\Eloquent\Collection {#4095
     all: [
       App\Survey {#4029
         id: "1",
         created_at: "2020-08-26 00:22:23",
         updated_at: "2020-08-26 00:22:23",
         survey_questions: Illuminate\Database\Eloquent\Collection {#4103
           all: [
             App\SurveyQuestion {#4101
               id: "1",
               survey_id: "1",
               created_at: "2020-08-26 00:22:23",
               updated_at: "2020-08-26 00:22:23",
             },
           ],
         },
       },
     ],
   }

您能否以 Github 存储库的形式提供一个最小的工作示例？

【讨论】：

感谢您的反馈 - 事实证明，这是用户错误和 SFTP 客户端不可靠的混合。