如何解决 Laravel 查询中的空返回？

Question

鉴于我的模型Person和Student. 现在，我的一个控制器正在这样做：$person_id = \App\Models\Person::insertGetId(['name' => $request->name, ...]);\App\Models\Student::create(['person_id' => $person_id, ...]);$student = \App\Models\Student::where('person_id', $person_id)->first();dd($student);在执行期间，一切都已保存，但我的问题是为什么我在死亡和转储时收到空值？顺便说一下，我的student表primary和foreign键是person_id列。编辑class Student extends Model{    protected $fillable = ['section', 'current_year'];//there are other attribute here which I didn't show because I am using mobile    public function person(){       return $this->belongsTo('App\Models\Person', 'person_id', 'id');    }    ...}

Answer 1

添加person_id属性$fillable：

protected $fillable = ['section', 'current_year', 'person_id'];