Zend Framework：需要三个值之一

Question

对于我的学校项目，我正在开发一个数据库管理应用程序。 这是我的第一个真正的 Zend Framework 应用程序。

现在，现在，我已经根据需要设置了 3 个值，邮政编码、电子邮件和电话。 它们是这样需要的（示例）：

        $mail = $this->createElement('text', 'mail');
    $mail->setLabel('E-mail:')
            ->setAttrib('size', 50)->addValidator('StringLength', false, array(6, 40))->addValidator('EmailAddress', true)
            ->setRequired(true);
        $telephone = $this->createElement('text', 'telephone');
    $telephone->setLabel('Telephone:')
            ->setAttrib('size', 50)->addValidator('StringLength', false, array(10, 10))
            ->setRequired(true);

我怎样才能只需要其中之一？

我正在使用 Zend_Form，也正在使用 Displaygroups。

有人知道我的程序的解决方案吗？也许使用数组？

预先感谢，

JorritK

更新

@brady.vitrano

好吧，我的代码的第一部分现在看起来像这样：

<?php

class Application_Form_Validate_ContactMethodSelected
extends Zend_Validate_Abstract
{
const INVALID = 'invalid';

protected $_messageTemplates = array(
    self::INVALID => 'Must select at least one contact method'
);

public function isValid($value, $context = array())
{
     // You need to use your element names, consider making these dynamic
    $checkFields = array('telefoon','mobiel','mail');
    // Check if all are empty
    foreach ( $checkFields as $field ) {
        if (isset($context[$field]) && !empty($context[$field])) {
            // Only one value needs to return true..skip the rest
            return true;
        }
    }

    // All were empty, set your own error message
    $this->_error(self::INVALID);
    return false;
}

}

class Application_Form_Nieuwkandidaat extends Zend_Form
{

public function init()
{
     $this->setMethod('post');
    $DB = Zend_Db_Table::getDefaultAdapter();


    $telefoon = $this->createElement('text', 'telefoon');
    $telefoon->setLabel('Telefoon:')
            ->setAttrib('size', 50)->addValidator('StringLength', false,array(10,10));
    $telefoon->addValidator(new Application_Form_Validate_ContactMethodSelected());
    $mobiel = $this->createElement('text', 'mobiel');
    $mobiel->setLabel('Mobiel:')
            ->setAttrib('size', 50)->addValidator('StringLength', false,array(10,10));
    $mobiel->addValidator(new Application_Form_Validate_ContactMethodSelected());
    $mail = $this->createElement('text', 'mail');
    $mail->setLabel('E-mail:')
            ->setAttrib('size', 50)->addValidator('StringLength', false,array(6,40))->addValidator('EmailAddress', true);
    $mail->addValidator(new Application_Form_Validate_ContactMethodSelected());

点击提交按钮后不会显示消息。我还应该改变什么？感谢您的帮助！

Answer 1

一个值得考虑的好解决方案是为元素编写自定义验证器。

在您的 isValid 方法中，您必须根据其他值的 $context 进行检查。类似于：

编辑

/** /library/Application/Form/Validate/ContactMethodSelected.php **/

class Application_Form_Validate_ContactMethodSelected 
    extends Zend_Validate_Abstract
{
    const INVALID = 'invalid';

    protected $_messageTemplates = array(
        self::INVALID => 'Must select at least one contact method'
    ); 

    public function isValid($value, $context = array())
    {
         // You need to use your element names, consider making these dynamic
        $checkFields = array('phone','email','address');
        // Check if all are empty
        foreach ( $checkFields as $field ) {
            if (isset($context[$field]) && !empty($context[$field])) {
                // Only one value needs to return true..skip the rest
                return true;
            }
        }

        // All were empty, set your own error message
        $this->_error(self::INVALID);
        return false;   
    }

}

现在，您必须告诉元素使用该验证器。因此，请对表单的 init() 方法进行更改。

 $mail->addValidator(new Application_Form_Validate_ContactMethodSelected());
 $telephone->addValidator(new Application_Form_Validate_ContactMethodSelected());

不要忘记：一旦您有了自己的自定义验证器，您就必须从每个元素中删除 isRequired() 。

EDIT2

您必须将自定义验证器设置为链中的第一个验证器，并在失败时中断。另外，您必须将 setAllowEmpty() 设置为 false。

$telefoon = $this->createElement('text', 'telefoon');
$telefoon->setLabel('Telefoon:')
        ->setAttrib('size', 50)->setAllowEmpty(false)
        ->addValidator(new Application_Form_Validate_ContactMethodSelected(),true)
        ->addValidator('StringLength', false,array(10,10));
$mobiel = $this->createElement('text', 'mobiel');
$mobiel->setLabel('Mobiel:')
        ->setAttrib('size', 50)->setAllowEmpty(false)
        ->addValidator(new Application_Form_Validate_ContactMethodSelected(),true)
        ->addValidator('StringLength', false,array(10,10));
$mail = $this->createElement('text', 'mail');
$mail->setLabel('E-mail:')
        ->setAttrib('size', 50)->setAllowEmpty(false)
        ->addValidator(new Application_Form_Validate_ContactMethodSelected(),true)
        ->addValidator('StringLength', false,array(6,40))->addValidator('EmailAddress', true);

接下来，您必须使用以下内容更新 isValid 方法：

public function isValid($value, $context = array())
{
    // You need to use your element names, consider making these dynamic
    $checkFields = array('telefoon','mobiel','mail');
    // Check if all are empty
    foreach ( $checkFields as $field ) {
    if (isset($context[$field]) && !empty($context[$field])) {

        if (!empty($value)) {
            // This is the element with content... validate as true
            return true;
        }
        // we are going to return false and no error
        // to break validation chain on other empty values
        // This is a quick hack, don't have time to invest in this
        return false;
        }
    }

    // All were empty, set your own error message
    $this->_error(self::INVALID);
    return false;
}

现在，您必须向使用此验证器的代码添加另一个条件。我们必须要求表单没有任何错误消息。

if ($form->isValid($_POST) || !count($form->getMessages())) {
    /** Valid, now you can process **/
} else {
    /** Not valid **/
}

Answer 2

我认为最好的方法是最简单的方法。您不必编写任何自定义验证器。您只需在表单验证后检查所需值之一是否显示为非空，因为这样您就可以访问经过筛选和验证的表单值。

if ($form->isValid($_POST)) {

    // get filtered and validated form values
    $params = $form->getValues();

    // check if there is a selected contact method
    if (isContactMethodSelected ($params)) {
       // the form is Valid!

    } else {
       // not valid
    }


} else {
    // not valid
}

这是“isContactMethodSelected”方法。您只需将其添加到当前控制器类中即可。

private function isContactMethodSelected ($params) {

        // define array with the contact methods as they appear in the $params as keys
        $checkFields = array('telefoon','mobiel','mail');

        // check if there is at least one contact method selected
        foreach ($checkFields as $field) {
            if (isset($params[$field]) && !empty($params[$field])) {
                return true;
            }
        }

        return false;
    }

Answer 3

我认为最简单、最快的解决方案是重写表单本身的 isValid 函数

class Application_Form_Nieuwkandidaat extends Zend_Form
{

    //...

    public function isValid($data)
    {
        $valid = parent::isValid($data);
        if ( ! $data['mail'] && ! $data['telephone'] && ! $data['postcode'] ){
            $this->addError('Please supply one of email, telephone or postcode');
            $valid = false;
        }
        return $valid;
    }

    //...

}

一个小函数，与表单相关，易于理解，不太可能失败，不太可能成为困难错误的来源。

Answer 4

去掉

$foo->setRequired();

按要求把不想设置的两个方法

$telephone->setLabel('Telephone:')
          ->setAttrib('size', 50)
          ->addValidator('StringLength', false, array(10, 10))
          ->setRequired(true);

....就变成了

$telephone->setLabel('Telephone:')
          ->setAttrib('size', 50)
          ->addValidator('StringLength', false, array(10, 10));