問題：我正在嘗試查詢 PeopleType 以查找與人員無關的所有課程。我有 4 張桌子人們人員類型培訓班People_CoursesPeopleType_Courses我有以下關系人物模型public function getPeopleType() {  return $this->belongsTo('App\PeopleType','type_id');}public function getCourses() {  return $this->belpngsToMany('App\Course','People_Courses','person_id','course_id');}PEOPLE_TYPE 模型public function getPeople() {  return $this->hasMany('App\Person','type_id');}public function getCourses() {  return $this->belpngsToMany('App\Course','PeopleType_Courses','people_type_id','course_id');}我的嘗試：$peopleType = \App\PeopleType::FindOrFail(1);$courses = $peopleType->getCourses()->whereNotIn('id', function($q) use($person) {                $q->select('course_id')                  ->from('People_Courses')                    ->where('person_id', $person->id);           })->get();我的回復：完整性約束違規：IN/ALL/ANY 子查詢中的 1052 列“id”不明確人員課程表示意圖Schema::create('People_Courses', function (Blueprint $table) {   $table->increments('id');   $table->integer('course_id');   $table->integer('person_id'););PeopleType_Courses 表示意圖Schema::create('PeopleType_Courses', function (Blueprint $table) {   $table->increments('id');   $table->integer('course_id');   $table->integer('people_type_id'););