基于其他表单元素的表单元素验证 - Form element validation based on other form element

Form element validation based on other form element

我正在呈现一个表单来添加一个类(课程)到数据库。类有一定的开始时间和结束时间。两者都是白天的田野。我为类创建了一个字段集:

<?php
namespace Admin'Form;
use Zend'Form'Fieldset;
use Zend'InputFilter'InputFilterInterface;
use Zend'InputFilter'InputFilterProviderInterface;
class ArtClassFieldset extends Fieldset implements InputFilterProviderInterface
{
    public function __construct()
    {
        parent::__construct('artclass');
        $this->add(array(
            'name'          => 'dayofweek',
            'type'          => 'Zend'Form'Element'Select',
            'options'       => array(
                'label'             => 'Day of week:',
                'value_options'     => array(
                    1           => 'Monday',
                    2           => 'Tuesday',
                    3           => 'Wednesday',
                    4           => 'Thursday',
                    5           => 'Friday',
                    6           => 'Saturday',
                ),
            ),
        ));
        $this->add(array(
                'name' => 'starttime',
                'type' => 'Zend'Form'Element'Time',
                'options' => array(
                    'label' => 'Start time:',
                    'format' => 'H:ia',
                ),
            )
        );
        $this->add(array(
                'name' => 'endtime',
                'type' => 'Zend'Form'Element'Time',
                'options' => array(
                    'label' => 'End time:',
                    'format' => 'H:ia',
                ),
            )
        );
        $this->add(array(
                'name' => 'teacher',
                'type' => 'Admin'Form'TeacherSelectorFieldset',
                'options' => array(
                    'label' => 'Teacher:',
                )
            )
        );
    }
    public function getInputFilterSpecification()
    {
        return array(
                'dayofweek' => array(
                    'required' => true,
                    'filters' => array(
                        array('name' => 'Int'),
                    ),
                    'validators' => array(
                        array(
                            'name' => 'Between',
                            'break_chain_on_failure' => true,
                            'options' => array(
                                'min' => 1,
                                'max' => 6, 
                            ),
                        ),
                    ),
                ),
                'starttime' => array(
                    'required' => true,
                ),
                'endtime' => array(
                    'required' => true,
                ),
                'teacher' => array(
                ),
        );
    }
}

在我的表单类，我只是添加这个字段集到我的表单:

<?php 
namespace Admin'Form;
use Zend'Form'Form;
class ArtClassAdd extends Form
{
    public function __construct()
    {
        parent::__construct("artclass-add");
        $this->setAttribute('action', '/admin/artclass/add');
        $this->setAttribute('method', 'post');
        $this->add(array(
                'type' => 'Admin'Form'ArtClassFieldset',
                'options' => array('use_as_base_fieldset' => true)
            )
        );
        $this->add(array(
                'name' => 'submit',
                'attributes' => array(
                    'type' => 'submit',
                    'value' => 'Save'                   
                )
            )
        );
    }
}

两个时间字段的格式是'H:ia'，所以这意味着我将得到类似'11:00am'的东西。我现在要做的是验证开始时间在结束时间之前。问题是我该怎么做?我想我可能应该使用Zend'Validator'Callback，但不确定。

你做对了。您必须使用Callback验证器。在endtime输入规范中使用如下内容:

return array(
    'endtime' => array(
        'required' => true,
        'validators' => array(
            array(
                'name' => 'Callback',
                'options' => array(
                    'callback' => function($value, $context)
                    {
                        $endtime = DateTime::createFromFormat'H:ia', $value);
                        $starttime = DateTime::createFromFormat('H:ia', $context['starttime']);
                        return $endtime > $starttime;
                    }
                ),
            ),
        ),
    ),
);