在Redbean PHP中验证

Question

我喜欢在RedbeanPHP中使用FUSE模型进行验证的想法.

我的应用程序有时需要通过多个源(表单,文件等)接受数据,因此将验证放在实际的类更新上是有意义的.

查看Redbean站点上的示例,验证似乎基于抛出异常.

当然,你只能抛出一个异常,所以我假设我需要在我的FUSE类中创建一个类型为"array"的附加属性来保存与各个字段相关的验证消息.

有没有人有更好的想法？这是我到目前为止一直在尝试的...

<form action="" method="post">
    <p>your name: <input name="name" type="text"></p>

    <p>your email: <input name="email" type="text"></p>

    <p>your message:</p>
    <textarea name="message" id="" cols="30" rows="10"></textarea>
    <input name="send" value="send message" type="submit">
</form>

<?php

/**
 * @property $name string
 * @property $email string
 * @property $message string
 */
class Model_Comment extends RedBean_SimpleModel{
    public $invalid = array();
    public function update(){
        if(empty($this->name)) $this->invalid['name'] = "field is empty";
        if(empty($this->email)) $this->invalid['email'] = "field is empty";
        if(empty($this->message)) $this->invalid['message'] = "field is empty";
        if(count($this->invalid) > 0) throw new Exception('Validation Failed!');
    }
    public function getInvalid(){
        return $this->invalid;
    }
}

if(isset($_POST['send'])){

    $comment = R::dispense('comment');
    /* @var $comment Model_Comment */
    $comment->import($_POST,'name,email,message');

    try{
        R::store($comment);
    }
    catch(Exception $e){
        echo $e->getMessage();
        $invalid = $comment->getInvalid();
        print_r($invalid);
        exit;
    }
    echo '<p>thank you for leaving a message.</p>';
}
echo "<h2>What people said!</h2>";

$comments = R::find('comment');
/* @var $comments Model_Comment[] */

foreach($comments as $comment){
    echo "<p>{$comment->name}: {$comment->message}</p>";
}

?>

Answer 1

您可以扩展RedBean_SimpleModel类以向其添加自己的方法和字段,因此它将适用于您的所有模型.然后,您可以使用事务来管理验证.它可能看起来像这样(代码未测试):

class RedBean_MyCustomModel extends RedBean_SimpleModel {
  private $errors = array();
  public function error($field, $text) {
    $this->errors[$field] = $text;
  }
  public function getErrors() {
    return $this->errors;
  }
  public function update() {
    $this->errors = array(); // reset the errors array
    R::begin(); // begin transaction before the update
  }
  public function after_update() {
    if (count($this->errors) > 0) {
      R::rollback();
      throw new Exception('Validation failed');
    }
  }
}

然后,您的模型可能如下所示:

class Model_Comment extends RedBean_MyCustomModel {
    public function update(){
        parent::update();
        if(empty($this->name)) $this->error('name', 'field is empty');
        if(empty($this->email)) $this->error('name', 'field is empty');
        if(empty($this->message)) $this->error('name', 'field is empty');
    }
    public function getInvalid(){
        return $this->invalid;
    }
}