class.forms.php

            return $this->fields;

        $fields = array(
            'dept' => new DepartmentField(array(
                    'id'=>1,
                    'label' => __('Department'),
                    'flags' => hexdec(0X450F3),
                    'required' => true,
                    'validator-error' => __('Department selection required'),
                    )
                ),
            'comments' => new TextareaField(array(
                    'id' => 2,
                    'label'=> '',
                    'required'=>false,
                    'default'=>'',
                    'configuration' => array(
                        'html' => true,
                        'size' => 'small',
                        'placeholder' => __('Optional reason for the transfer'),
                        ),
                    )
                ),
            );

        $this->setFields($fields);

        return $this->fields;
    }

    function isValid() {

        if (!parent::isValid())
            return false;

        // Do additional validations
        if (!($dept = $this->getDept()))
            $this->getField('dept')->addError(
                    __('Unknown department'));

        return !$this->errors();
    }

    function render($options) {

        switch(strtolower($options['template'])) {
        case 'simple':
            $inc = STAFFINC_DIR . 'templates/dynamic-form-simple.tmpl.php';
            break;
        default:
            throw new Exception(sprintf(__('%s: Unknown template style %s'),
                        get_class(), $options['template']));
        }

        $form = $this;
        include $inc;

    }

    function getDept() {

        if (!isset($this->_dept)) {
            if (($id = $this->getField('dept')->getClean()))
                $this->_dept = Dept::lookup($id);
        }

        return $this->_dept;
    }
}

/**
 * FieldUnchanged
 *
 * Thrown in the to_database() method to indicate the value should not be
 * saved in the database (it wasn't changed in the request)
 */
class FieldUnchanged extends Exception {}
?>