Laravel 5.8:试图获取非对象的 属性 'created_at' 时发生奇怪的错误

Laravel 5.8: Weird Error Trying to get property 'created_at' of non-object

我正在使用 Laravel 5.8 开发我的项目,在这个项目中,我在 Member 模型和 [=17= 之间有一个 OneToMany 关系] 像这样的模型:

Student.php:

public function member()
    {
        return $this->belongsTo(Student::class, 'std_mbr_id');
    }

Member.php:

public function student()
    {
        return $this->hasOne(Student::class,'std_mbr_id');
    }

然后在控制器上,我添加了这个:

public function index()
    {
        $student = new Student();
        $students = $student->searchStudents()->paginate(20);
        $custom = new Student();
        $customs = $custom->all();
        return view('admin.students.custom', compact('students','customs'));
    }

现在在视图中我想获得 created_at 时间戳,如下所示:

$customs->find($student->mbr_id)->created_at

但这会return这个错误:

正在尝试获取 属性 'created_at' 的非对象

然而,当我 dd($customs->find($student->mbr_id)) 时,我可以正确获取时间戳:

那么在这种情况下如何访问 created_at 时间戳?


更新#1:

{{ dd($customs->find($student->mbr_id)->created_at ) }}的结果:

首先检查是否 $customs->find($student->mbr_id) returns 东西:

$customs->find($student->mbr_id) ? $customs->find($student->mbr_id)->created_at : 'not found';