如何繼承ZF3中嵌套字段集的getInputFilterSpecification方法

Question

我正在使用類表繼承模式在ZF3模塊的字段集類中開發輸入篩選器。 ZF3文檔指出，fieldset類必須實現Zend\\InputFilter\\InputFilterProviderInterface ，該方法定義了getInputFilterSpecification()方法。

namespace Contact\Form;

use Zend\Filter;
use Zend\Form\Fieldset;
use Zend\InputFilter\InputFilterProviderInterface;
use Zend\Validator;

class SenderFieldset extends Fieldset implements InputFilterProviderInterface
{
    public function getInputFilterSpecification()
    {
        return [
            'name' => [
                'required' => true,
                'filters'  => [
                    ['name' => Filter\StringTrim::class],
                ],
                'validators' => [
                    [
                        'name' => Validator\StringLength::class,
                        'options' => [
                            'min' => 3,
                            'max' => 256
                        ],
                    ],
                ],
            ],
            'email' => [
                'required' => true,
                'filters'  => [
                    ['name' => Filter\StringTrim::class],
                ],
                'validators' => [
                    new Validator\EmailAddress(),
                ],
            ],
        ];
    }
}

這對於獨立的字段集類來說效果很好，但是如果我有一個字段集擴展了另一個字段集，則該表單僅使用子級的getInputFilterSpecification()方法。

namespace Contact\Form;

use Zend\Filter;
use Zend\Form\Fieldset;
use Zend\InputFilter\InputFilterProviderInterface;
use Zend\Validator;

class PersonFieldset extends Fieldset implements InputFilterProviderInterface
{
    public function getInputFilterSpecification()
    {
        return [
            'name' => [
                'required' => true,
                'filters'  => [
                    ['name' => Filter\StringTrim::class],
                ],
                'validators' => [
                    [
                        'name' => Validator\StringLength::class,
                        'options' => [
                            'min' => 3,
                            'max' => 256
                        ],
                    ],
                ],
            ],
        ];
    }
}

class SenderFieldset extends PersonFieldset implements InputFilterProviderInterface
{
    public function getInputFilterSpecification()
    {
        return [
            'email' => [
                'required' => true,
                'filters'  => [
                    ['name' => Filter\StringTrim::class],
                ],
                'validators' => [
                    new Validator\EmailAddress(),
                ],
            ],
        ];
    }
}

由於getInputFilterSpecification()方法只是return語句的集合，我以為可以在子方法中添加對父方法的調用，但這似乎不起作用：

// in child:

    public function getInputFilterSpecification()
    {

        parent::getInputFilterSpecification();

    // ... 

如何在子字段集中獲取getInputFilterSpecification()方法，以從父級的getInputFilterSpecification()方法繼承代碼？

Answer 1

感謝Dolly Aswin的評論，這是答案：

namespace Contact\Form;

use Zend\Filter;
use Zend\Form\Fieldset;
use Zend\InputFilter\InputFilterProviderInterface;
use Zend\Validator;

class PersonFieldset extends Fieldset implements InputFilterProviderInterface
{
    public function getInputFilterSpecification()
    {
        return [
            'name' => [
                'required' => true,
                'filters'  => [
                    ['name' => Filter\StringTrim::class],
                ],
                'validators' => [
                    [
                        'name' => Validator\StringLength::class,
                        'options' => [
                            'min' => 3,
                            'max' => 256
                        ],
                    ],
                ],
            ],
        ];
    }
}

class SenderFieldset extends PersonFieldset implements InputFilterProviderInterface
{
    public function getInputFilterSpecification()
    {

        // get input filter specifications from parent class
        return parent::getInputFilterSpecification();

        return [
            'email' => [
                'required' => true,
                'filters'  => [
                    ['name' => Filter\StringTrim::class],
                ],
                'validators' => [
                    new Validator\EmailAddress(),
                ],
            ],
        ];
    }
}