Laravel扩展包类 [英] Laravel extend package class

问题描述

我在Laravel安装中添加了购物车包，但是我需要在类中添加一个方法.如果我直接修改该类，当我更新到较新版本时，所做的更改是否会被覆盖?如果是这样，在不中断将来更新的情况下修改软件包的最佳方法是什么?

I added a cart package to my Laravel install, but I need to add a method to the class. If I modify the class directly, will my changes be overwritten when I update to a newer version? If so, what's the best method for modifying a package without breaking future updates?

感谢您的帮助！ -JB

Thanks for the help! -JB

推荐答案

我不知道是否有从供应商目录扩展Laravel 5.0软件包的通用过程，并且我确定这对于不同的软件包可能有所不同.但是话说回来，当我想扩展此购物车时，我遇到了同样的问题.但是我以某种方式进行了管理，下面是我遵循的步骤.我希望它能提供一些提示.

I don't know if there is any general process to extend Laravel 5.0 package from vendor directory and I am sure this may be different for different packages. But saying that, I faced the same issue when I wanted to extend this cart . But I managed it somehow and steps I followed are below. I hope it may give some hint.

1. 安装软件包

1. Install the package

composer require "gloudemans/shoppingcart":"~1.3"

创建目录app/Services/Cart并在其下创建新的类MyCart

Create directory app/Services/Cart and a new class MyCart under it

<?php

namespace App\Services\Cart;

use Gloudemans\Shoppingcart\Cart;

class MyCart extends Cart
{

}

在app/Providers目录下创建CartServiceProvider，

create CartServiceProvider under app/Providers directory,

<?php namespace App\Providers;

 use App\Services\Cart\MyCart;
 use Illuminate\Support\ServiceProvider;

class CartServiceProvider extends ServiceProvider {

/**
 * Bootstrap the application services.
 *
 * @return void
 */
public function boot()
{
    //
}

/**
 * Register the application services.
 *
 * @return void
 */
public function register()
{
    $this->app['mycart'] = $this->app->share(function($app)
    {
        $session = $app['session'];
        $events = $app['events'];
        return new MyCart($session, $events);
    });
}

}

在app/Services/Cart目录下创建MyCartFacade，

<?php

namespace App\Services\Cart;

use Illuminate\Support\Facades\Facade;

class MyCartFacade extends Facade {
    protected static function getFacadeAccessor() { return 'mycart'; }
}

中的

在providers数组中添加以下内容

in config/app.php add following in providers array

'App\Providers\CartServiceProvider'

，然后在aliases数组中

'MyCart'      => 'App\Services\Cart\MyCartFacade'

就是这样.现在，在控制器中，我放置了以下代码. add和content是基础Cart类中的方法.

That's it. Now in my controller I placed following code. add and content are method in base Cart class.

\MyCart::add('293ad', 'Product 1', 1, 9.99, array('size' => 'large'));
echo '<pre>';
print_r(\MyCart::content());
exit();

然后是输出

Gloudemans\Shoppingcart\CartCollection Object
(
    [items:protected] => Array
        (
            [0f6524cc3c576d484150599b3682251c] => Gloudemans\Shoppingcart\CartRowCollection Object
                (
                    [associatedModel:protected] => 
                    [associatedModelNamespace:protected] => 
                    [items:protected] => Array
                        (
                            [rowid] => 0f6524cc3c576d484150599b3682251c
                            [id] => 293ad
                            [name] => Product 1
                            [qty] => 1
                            [price] => 9.99
                            [options] => Gloudemans\Shoppingcart\CartRowOptionsCollection Object
                                (
                                     [items:protected] => Array
                                        (
                                            [size] => large
                                        )

                                )

                            [subtotal] => 9.99
                        )

                )

        )

)

现在，如果要添加或覆盖功能，只需将该功能放在MyCart类中即可.

Now if you want to add or override functionality simply put that function in MyCart class.

好处是，您可以更新基本软件包.

The good thing is, you can update the base package.

我希望它会有所帮助.

I hope it helps.

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