php - Laravel 扩展 Form 类

Question

我正在尝试扩展 L4.1 中的 Form 类，但我似乎遗漏了一些东西。我的文件根据API命名为FormBuilder.php，保存在app/libraries/extended/FormBuilder.php。

<?php namespace Extended;

class FormBuilder extends \Illuminate\Html\FormBuilder {

/**
 * Create a text input field.
 *
 * @param  string  $name
 * @param  string  $value
 * @param  array   $options
 * @return string
 */
public function text($name, $value = null, $options = array())
{
        $options = $options + array('id'=>"field-{$name}");
        return $this->input('text', $name, $value, $options);
}

}

这实际上是我第一次尝试在 Laravel 中扩展核心类。我似乎不知道如何正确地扩展像这样的 Form 类的核心类。

编辑:我将 "app/libraries/extended" 添加到我的 composer.json 文件并运行了 composer.phar update 和 composer.phar dump-autoload 但它似乎仍在使用核心类而不是我的扩展类。我忘了做什么？

Answer 1

要扩展/交换 Laravel 核心类，您可以创建一个服务提供者:

文件:app/App/Libraries/Extensions/FormBuilder/FormBuilderServiceProvider.php

<?php namespace App\Libraries\Extensions\FormBuilder;

use Illuminate\Support\ServiceProvider as  IlluminateServiceProvider;
use App\Libraries\Extensions\FormBuilder\FormBuilder;

class FormBuilderServiceProvider extends IlluminateServiceProvider {

    /**
     * Indicates if loading of the provider is deferred.
     *
     * @var bool
     */
    protected $defer = true;

    /**
     * Register the service provider.
     *
     * @return void
     */
    public function register()
    {
        $this->app->bindShared('formbuilder', function($app)
        {
            $form = new FormBuilder($app['html'], $app['url'], $app['session.store']->getToken());

            return $form->setSessionStore($app['session.store']);
        });
    }

    /**
     * Get the services provided by the provider.
     *
     * @return array
     */
    public function provides()
    {
        return array('formbuilder');
    }

}

为它创建一个 Facade:

文件:app/App/Libraries/Extensions/FormBuilder/FormBuilderFacade.php

<?php namespace App\Libraries\Extensions\FormBuilder;

use Illuminate\Support\Facades\Facade as IlluminateFacade;

class FormBuilderFacade extends IlluminateFacade {

    /**
     * Get the registered name of the component.
     *
     * @return string
     */
    protected static function getFacadeAccessor() { return 'formbuilder'; }

}

这将是您的命名空间服务类:

文件:app/App/Libraries/Extensions/FormBuilder/FormBuilder.php

<?php namespace App\Libraries\Extensions\FormBuilder;

use \Illuminate\Html\FormBuilder as IlluminateFormBuilder;

class FormBuilder extends IlluminateFormBuilder {

    public function text($name, $value = null, $options = array())
    {
        $options = $options + array('id'=>"field-{$name}");

        return $this->input('text', $name, $value, $options);
    }

}

打开 app/config/app.php 并将您的服务提供商添加到列表中

'App\Libraries\Extensions\FormBuilder\FormBuilderServiceProvider',

并将 Laravel 的 Form 别名替换为你的

    'Form'            => 'App\Libraries\Extensions\FormBuilder\FormBuilderFacade',

为了测试，我创建了一个这样的路由器:

Route::any('test', function() {

   return e(Form::text('first_name'));

});

它给了我这个结果:

<input id="field-first_name" name="first_name" type="text">