Laravel 实现关系模型取出需要的字段

 public function readOrganization($id) {

 $list = Organization::with(['authcodes' => function ($query) {$query->select('organization_id', 'auth_code');}])->find($id);

 if (empty($list)) {
 return '未查到结果！';
 }
 $list = $list->toArray();

 $list['authcodes'] = join(PHP_EOL, array_column($list['authcodes'], 'auth_code'));
 return view('organization/readOrganization', compact('list'));
 }