laravel5表单唯一验证的实例代码

Route::resource('/users', 'UsersController');

 public function rules()
 {
  return [
   'email' =  'required|unique:users,email,' . $this- route('user')- id,
   'username' =  'required',
  ];
 }

 public function edit(User $user)
 {
  return view('user.edit', [
   'user' =  $user,
  ]);
 }