yii2 在控制器中验证请求参数的使用方法

namespace frontend\controllers\api;
use yii\web\Controller;
use common\services\app\ParamsValidateService;
class ArticleController extends Controller
{
  // 文章列表
  public function actionList()
  {
    $PVS = new ParamsValidateService();
    $valid = $PVS->validate(\Yii::$app->request->get(), [
      ['category_id', 'required'],
      ['category_id', 'integer'],
      ['keyword', 'string'],
    ]);
    if (!$valid) {
      $this->apiError(1001, $PVS->getErrorSummary(true));
    }
    //...
  }
  // 新增文章
  public function actionPost()
  {
    $PVS = new ParamsValidateService();
    $valid = $PVS->validate(\Yii::$app->request->get(), [
      [['category_id', 'title', 'content'], 'required'],
      ['category_id', 'integer'],
      [['title'], 'string', 'max' => 64],
      [['content'], 'string'],
    ]);
    if (!$valid) {
      $this->apiError(1001, $PVS->getErrorSummary(true));
    }
    //...
  }
  // 文章删除
  public function actionDelete()
  {
    $PVS = new ParamsValidateService();
    $valid = $PVS->validate(\Yii::$app->request->get(), [
      ['article_id', 'required'],
      ['article_id', 'integer'],
    ]);
    if (!$valid) {
      $this->apiError(1001, $PVS->getErrorSummary(true));
    }
    //...
  }
}

<?php
namespace common\models\app;
use yii\db\ActiveRecord;
class ParamsValidateModel extends ActiveRecord
{
  /**
   * @var array 验证规则
   */
  private $_rules = [];
  private $_attributes = [];
  // 设置验证规则
  public function setRules($rules)
  {
    $this->_rules = $rules;
    foreach ($rules as $item) {
      $this->_attributes = array_unique(array_merge($this->_attributes, (array)$item[0]));
    }
  }
  // 重写获取验证规则
  public function rules()
  {
    return $this->_rules;
  }
  // 设置可用属性列表
  public function attributes()
  {
    return $this->_attributes;
  }
}

<?php
namespace common\services\app;
use common\models\app\ParamsValidateModel;
use yii\base\Component;
/**
 * Class ParamsValidateService
 * @package common\services\app
 * @method array getErrors(\string $attribute)
 * @method array getFirstErrors()
 * @method array getFirstError(\string $attribute)
 * @method array getErrorSummary(\boolean $showAllErrors)
 */
class ParamsValidateService extends Component
{
  /**
   * @var ParamsValidateModel 模型
   */
  private $model = null;
  public function init()
  {
    parent::init();
    $this->model = new ParamsValidateModel();
  }
  /**
   * @param array $data 数据项
   * @param array $rules 验证规则
   * @return bool
   */
  public function validate($data, $rules)
  {
    // 添加验证规则
    $this->model->setRules($rules);
    // 设置参数
    $this->model->load($data, '');
    // 进行验证
    return $this->model->validate();
  }
  public function __call($name, $params)
  {
    if ($this->model->hasMethod($name)) {
      return call_user_func_array([$this->model, $name], $params);
    } else {
      return parent::__call($name, $params);
    }
  }
}