cakephp-3.0 – 在验证失败时,beforeMarshal不会修改请求数据

这个问题可能与How to use Trim() before validation NotEmpty?有关.

Modifying Request Data Before Building Entities
If you need to modify request data before it is converted into entities,you can use the Model.beforeMarshal event. This event lets you manipulate the request data just before entities are created. 07001

根据该书,无论是否存在验证错误,我都希望请求数据始终更改.

示例或测试用例：

// /src/Model/Table/UsersTable.php
namespace AppModelTable;
use CakeORMTable;
// Required for beforeMarshal event:
use CakeEventEvent;
use ArrayObject;
// Required for Validation:
use CakeValidationValidator;

class UsersTable extends Table {

  public function beforeMarshal(Event $event,ArrayObject $data,ArrayObject $options) {
    $data['firstname'] = trim($data['firstname']);
  }

  public function validationDefault(Validator $validator) {
    $validator
      ->add('firstname',[
        'minLength'   => [ 'rule' => ['minLength',2],'message' => 'Too short.' ],])
      ;
    return $validator;
  }
}

如果我输入“d”(Space-d),则会显示验证错误,但空格本身不会在表单中删除.我会表示只显示“d”的表单,因为使用beforeMarshal事件从请求数据中删除了空格.那么……错误还是功能？

我的解决方案是在控制器中使用trim() – 函数而不是beforeMarshal事件：

// /src/Controller/UsersController.php
// ...
public function add() {
  $user = $this->Users->newEntity();
  if ($this->request->is('post')) {
    // Use trim() here instead of beforeMarshal?
    $this->request->data['firstname'] = trim($this->request->data['firstname']);
    $user = $this->Users->patchEntity($user,$this->request->data );
    if ( $this->Users->save($user) ) {
      $this->Flash->succeed('Saved');
      return $this->redirect(['controller' => 'Users','action' => 'index']);
    } else {
      $this->Flash->error('Error');
    }
  }
  $this->set('user',$user);
}

这样,即使存在验证错误,也会删除空间.或者我错过了另一个类似于beforeMarshal的功能,它实际上是在修改请求数据吗？