Zend Form Validator : Element A or Element B

zend-form, zend-form-element, zend-framework

Solution

See the 'Note: Validation Context' on at this page. Zend_Form passes the context along to every Zend_Form_Element::isValid call as the second parameter. So simply write your own validator that analyzes the context.

EDIT: Alright, I thought I'ld take a shot at this myself. It's not tested, nor is it a means to all ends, but it will give you a basic idea.

class My_Validator_OneFieldShouldBePresent extend Zend_Validator_Abstract
{
    const NOT_PRESENT = 'notPresent';

    protected $_messageTemplates = array(
        self::NOT_PRESENT => 'Field %field% is not present'
    );

    protected $_messageVariables = array(
        'field' => '_field'
    );

    protected $_field;

    protected $_listOfFields;

    public function __construct( array $listOfFields )
    {
        $this->_listOfFields = $listOfFields;
    }

    public function isValid( $value, $context = null )
    {
        if( !is_array( $context ) )
        {
            $this->_error( self::NOT_PRESENT );

            return false;
        }

        foreach( $this->_listOfFields as $field )
        {
            if( isset( $context[ $field ] ) )
            {
                return true;
            }
        }

        $this->_field = $field;
        $this->_error( self::NOT_PRESENT );

        return false;
    }
}

Usage:

$oneOfTheseFieldsShouldBePresent = array( 'companyname', 'companyother' );

$companyname = new Zend_Form_Element_Text('companyname');
$companyname->setLabel('Company Name');
$companyname->setDecorators($decors);
$companyname->addValidator( new My_Validator_OneFieldShouldBePresent( $oneOfTheseFieldsShouldBePresent ) );
$this->addElement($companyname);

$companyother = new Zend_Form_Element_Text('companyother');
$companyother->setLabel('Company Other');
$companyother->setDecorators($decors);
$companyname->addValidator( new My_Validator_OneFieldShouldBePresent( $oneOfTheseFieldsShouldBePresent ) );
$this->addElement($companyother);

Problem

Original source