短篇小说： 我无法使用使用composer（https://packagist.org/packages/illuminate/container）安装的Laravel容器进行方法注入。仅当在对象的构造函数中使用时，注入才有效。例如：
class SomeClass {
function __construct(InjectedClassWorksHere $obj) {}
function someFunction(InjectedClassFailsHere $obj) {}
}
长篇故事： 我正在考虑重新考虑一个使用Laravel的重大项目，但由于业务压力，我无法投入我想要的时间。为了不让婴儿与洗澡水一起出去，我正在使用各个Laravel组件来提升旧分支中正在开发的代码的优雅。在评估Laravel时我最喜欢的一种新技术是依赖注入的概念。我很高兴后来发现我可以使用Laravel项目的外部。我现在有这个工作，一切都很好，除了在线发现的容器的开发版本似乎不支持方法注入。
是否有其他人能够让容器工作并在Laravel项目之外进行方法注入？
到目前为止我的方法......
composer.json
"illuminate/support": "5.0.*@dev",
"illuminate/container": "5.0.*@dev",
应用程序引导代码：
use Illuminate\Container\Container;
$container = new Container();
$container->bind('app', self::$container); //not sure if this is necessary
$dispatcher = $container->make('MyCustomDispatcher');
$dispatcher->call('some URL params to find controller');
通过上面的内容，我可以注入我的控制器的构造函数，但不能注入它们的方法方法。我错过了什么？
完整来源......（C：\ workspace \ LMS＆gt; php cmd \ test_container.php）
<?php
// This sets up my include path and calls the composer autoloader
require_once "bare_init.php";
use Illuminate\Container\Container;
use Illuminate\Support\ClassLoader;
use Illuminate\Support\Facades\Facade;
// Get a reference to the root of the includes directory
$basePath = dirname(dirname(__FILE__));
ClassLoader::register();
ClassLoader::addDirectories([
$basePath
]);
$container = new Container();
$container->bind('app', $container);
$container->bind('path.base', $basePath);
class One {
public $two;
public $say = 'hi';
function __construct(Two $two) {
$this->two = $two;
}
}
Class Two {
public $some = 'thing';
public function doStuff(One $one) {
return $one->say;
}
}
/* @var $one One */
$one = $container->make(One);
var_dump($one);
print $one->two->doStuff();
当我运行上述内容时，我得到......
C:\workspace\LMS>php cmd\test_container.php
object(One)#9 (2) {
["two"]=>
object(Two)#11 (1) {
["some"]=>
string(5) "thing"
}
["say"]=>
string(2) "hi"
}
PHP Catchable fatal error: Argument 1 passed to Two::doStuff() must be an instance of One, none
given, called in C:\workspace\LMS\cmd\test_container.php on line 41
and defined in C:\workspace\LMS\cmd\test_container.php on line 33
Catchable fatal error: Argument 1 passed to Two::doStuff() must be an instance of One, none
given, called in C:\workspace\LMS\cmd\test_container.php on line 41 and
defined in C:\workspace\LMS\cmd\test_container.php on line 33
或者，一个更基本的例子，说明注入在构造函数中工作但不是方法...
class One {
function __construct(Two $two) {}
public function doStuff(Three $three) {}
}
class Two {}
class Three {}
$one = $container->make(One); // totally fine. Injection works
$one->doStuff(); // Throws Exception. (sad trombone)
答案 0 :(得分：6)
只需将One的实例传递给您对Two的调用：
$one = $container->make('One');
var_dump($one);
print $one->two->doStuff($one);
...返回
object(One)#8 (2) {
["two"]=>
object(Two)#10 (1) {
["some"]=>
string(5) "thing"
}
["say"]=>
string(2) "hi"
}
hi
如下所述，在Laravel 5.0中，方法注入仅适用于路由和控制器。所以你也可以把它们拉进你的项目中，并在这个过程中获得更多的Laravel-y。方法如下：
在composer.json 中，需要添加illuminate/routing和illuminate/events：
{
"require-dev": {
"illuminate/contracts": "5.0.*@dev",
"illuminate/support": "5.0.*@dev",
"illuminate/container": "5.0.*@dev",
"illuminate/routing": "5.0.*@dev",
"illuminate/events": "5.0.*@dev"
},
"autoload": {
"psr-4": {
"App\\": "app/"
}
},
"minimum-stability": "dev",
"prefer-stable": true
}
在routing.php 中，设置Laravel的路由和控制器服务：
/**
* routing.php
*
* Sets up Laravel's routing and controllers
*
* adapted from http://www.gufran.me/post/laravel-components
* and http://www.gufran.me/post/laravel-illuminate-router-package-in-your-application
*/
$basePath = str_finish(dirname(__FILE__), '/app/');
$controllersDirectory = $basePath . 'Controllers';
// Register directories into the autoloader
Illuminate\Support\ClassLoader::register();
Illuminate\Support\ClassLoader::addDirectories($controllersDirectory);
// Instantiate the container
$app = new Illuminate\Container\Container();
$app['env'] = 'production';
$app->bind('app', $app); // optional
$app->bind('path.base', $basePath); // optional
// Register service providers
with (new Illuminate\Events\EventServiceProvider($app))->register();
with (new Illuminate\Routing\RoutingServiceProvider($app))->register();
require $basePath . 'routes.php';
$request = Illuminate\Http\Request::createFromGlobals();
$response = $app['router']->dispatch($request);
$response->send();
在Controllers/One.php 中，将类创建为Controller，因此我们可以使用L5的方法注入：
/**
* Controllers/One.php
*/
Class One extends Illuminate\Routing\Controller {
public $some = 'thingOne';
public $two;
public $three;
function __construct(Two $two) {
$this->two = $two;
echo('<pre>');
var_dump ($two);
echo ($two->doStuffWithTwo().'<br><br>');
}
public function doStuff(Three $three) {
var_dump ($three);
return ($three->doStuffWithThree());
}
}
在routes.php 中，定义我们的测试路线：
$app['router']->get('/', 'One@dostuff');
最后，在index.php 中，启动所有内容并定义我们的类以测试依赖项注入：
/**
* index.php
*/
// turn on error reporting
ini_set('display_errors',1);
error_reporting(E_ALL);
require 'vendor/autoload.php';
require 'routing.php';
// the classes we wish to inject
Class Two {
public $some = 'thing Two';
public function doStuffWithTwo() {
return ('Doing stuff with Two');
}
}
Class Three {
public $some = 'thing Three';
public function doStuffWithThree() {
return ('Doing stuff with Three');
}
}
点击index.php，你应该得到这个：
object(Two)#40 (1) {
["some"]=>
string(9) "thing Two"
}
Doing stuff with Two
object(Three)#41 (1) {
["some"]=>
string(11) "thing Three"
}
Doing stuff with Three
一些说明......
$one->doStuff();（因为doStuff期待一个实例）。相反，路由器调用doStuff并为我们解析IoC容器。