description isnt displaying for zf2 form element - zend-framework2

Question

I am trying to add a description to my form element. I am expecting to get my description in p tags.
<?php
namespace CsnCms\Form;
use Zend\Form\Form;
class ArticleForm extends Form
{
public function __construct($name = null)
{
parent::__construct('article');
$this->setAttribute('method', 'post');
$this->add(array(
'name' => 'currency',
'attributes' => array(
'type' => 'text',
'placeholder' =>'Currency',
),
'options' => array(
'label' => ' ',
'description' => 'Currency code: ie. USD',
),
));
}
}
unfortunately I am only getting this as an output
<label><span> </span><input name="currency" type="text" placeholder="Currency" value=""></label>
any advice?

Answer 1

Maybe this will work
$form = $this->form;
$element = $form->get("currency");
echo $this->formInput($element);
echo $element->getOption("description"); // <-------
?>

Answer 2

zf2 form elements don't have native description option u need to add it manually :
$this->add(array(
'name' => 'catMachineName',
'type' => 'Zend\Form\Element\Text',
'options' => array(
'label' => 'Category Machine Name',
'description' => 'Machine name can only contain English Alphabets and Numbers and _ and no space and no number at the beginning'
),
));
and render it in view like with something like this:
echo $form->get('catMachineName')->getOption('description);

Answer 3

Thanks I wrote my own view helper. I also added a class="error" in the error tags.
Thanks for the help guys.
<?php
namespace User\View\Helper;
use Zend\View\Helper\AbstractHelper;
use Zend\Form\View\Helper\FormRow;
use Zend\Form\ElementInterface;
class FormRowWithDescription extends FormRow
{
/**
* Utility form helper that renders a label (if it exists), an element and errors
*
* #param ElementInterface $element
* #throws \Zend\Form\Exception\DomainException
* #return string
*/
public function render(ElementInterface $element)
{ $escapeHtmlHelper = $this->getEscapeHtmlHelper();
$labelHelper = $this->getLabelHelper();
$elementHelper = $this->getElementHelper();
$elementErrorsHelper = $this->getElementErrorsHelper();
$label = $element->getLabel();
$inputErrorClass = $this->getInputErrorClass();
if (isset($label) && '' !== $label) {
// Translate the label
if (null !== ($translator = $this->getTranslator())) {
$label = $translator->translate(
$label, $this->getTranslatorTextDomain()
);
}
}
// Does this element have errors ?
if (count($element->getMessages()) > 0 && !empty($inputErrorClass)) {
$classAttributes = ($element->hasAttribute('class') ? $element->getAttribute('class') . ' ' : '');
$classAttributes = $classAttributes . $inputErrorClass;
$element->setAttribute('class', $classAttributes);
}
if ($this->partial) {
$vars = array(
'element' => $element,
'label' => $label,
'labelAttributes' => $this->labelAttributes,
'labelPosition' => $this->labelPosition,
'renderErrors' => $this->renderErrors,
);
return $this->view->render($this->partial, $vars);
}
if ($this->renderErrors) {
$elementErrorsHelper
->setMessageOpenFormat('<ul%s><li class="error">')
->setMessageSeparatorString('</li><li class="error">');
$elementErrors = $elementErrorsHelper->render($element);
}
$elementString = $elementHelper->render($element);
$description = $element->getOption('description');
$elementString.="<p class='description'>".$description."</p>";
if (isset($label) && '' !== $label) {
$label = $escapeHtmlHelper($label);
$labelAttributes = $element->getLabelAttributes();
if (empty($labelAttributes)) {
$labelAttributes = $this->labelAttributes;
}
// Multicheckbox elements have to be handled differently as the HTML standard does not allow nested
// labels. The semantic way is to group them inside a fieldset
$type = $element->getAttribute('type');
if ($type === 'multi_checkbox' || $type === 'radio') {
$markup = sprintf(
'<fieldset><legend>%s</legend>%s</fieldset>',
$label,
$elementString);
} else {
if ($element->hasAttribute('id')) {
$labelOpen = '';
$labelClose = '';
$label = $labelHelper($element);
} else {
$labelOpen = $labelHelper->openTag($labelAttributes);
$labelClose = $labelHelper->closeTag();
}
if ($label !== '' && !$element->hasAttribute('id')) {
$label = '<span>' . $label . '</span>';
}
// Button element is a special case, because label is always rendered inside it
if ($element instanceof Button) {
$labelOpen = $labelClose = $label = '';
}
switch ($this->labelPosition) {
case self::LABEL_PREPEND:
$markup = $labelOpen . $label . $elementString . $labelClose;
break;
case self::LABEL_APPEND:
default:
$markup = $labelOpen . $elementString . $label . $labelClose;
break;
}
}
if ($this->renderErrors) {
$markup .= $elementErrors;
}
} else {
if ($this->renderErrors) {
$markup = $elementString . $elementErrors;
} else {
$markup = $elementString;
}
}
return $markup;
}
}