CODEWITHSUNDEEP
zend-frameworkzend-formzend-form-elementzend-decorators
Eric Spreen
Eric Spreen

Reputation: 341

Zend_Form_Element conditional class on HtmlTag decorator (on errors)

In one of my web projects I'm building with Zend Framework, I have a form with the following structure:

<form>
  <fieldset>
    <h2>Header</h2>
    <ul>
      <li>
        <label />
        <div>
          <input />
          <small>Helptext</small>
        </div>
      </li>
      <li class="error"> <!-- This one has errors -->
        <label />
        <div>
          <input />
          <ul class="errors">
            <li>Error message</li>
          </ul>
          <small>Helptext</small>
        </div>
      </li>
    </ul>
  </fieldset>
</form>

I am able to build this structure using the standard decorators of Zend Framework, except for one thing. I need to be able to add the error class on the li of elements that have validation errors and such. I use the following validators:

The default validators are disabled. (I use $element->setDecorators() in the init() method of a custom form class that extends Zend_Form.) So my problem boils down to adding the class "error" to the last decorator when there are any validation errors on the element.

Does anybody know a handy way to do this? I guess I could override the default render method of the elements to check if there are any validation errors and then add a class option to a named decorator, but that is not really elegant. I'm wondering if there is some standardised way to do this... I am using Zend Framework 1.11, by the way.

Cheers, Eric

Tl;dr:

How to add a class option to a HtmlTag decorator on a Zend_Form_Element when there are validation errors?

Upvotes: 1

Views: 480

Answers (1)

Pieter
Pieter

Reputation: 1774

When you only want the error class for a couple of elements, you could simply use a callback for the class attribute. This would look something like the following:

$form->addElement('text', 'test', array(
    'decorators' => array(
        'ViewHelper',
        array(
            'HtmlTag',
            array(
                'tag' => 'li',
                'class' => array(
                    'callback' => function($decorator) {
                        if($decorator->getElement()->hasErrors()) {
                            return 'error';
                        }
                    }
                )
            )
        )
    )
));

If you use PHP5.2 or earlier, you need to replace the closure with an array based callback (e.g. array($this, 'getLiClassAttribute'))

If you want to use the error class for all your elements, you are better off writing a custom decorator.

Upvotes: 1

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