我正在构建一个Web应用程序,我的控制器出现了问题。
我想向我的控制器发送我的League \ Plate \ Engine(注册在我的容器中),但我一直有同样的错误:Argument 3 passed to App\Controller\Main::index() must be an instance of League\Plates\Engine, array given
这是我的档案:
的 dependencies.php
use League\Container\Container;
use Monolog\Handler\StreamHandler;
use Monolog\Logger;
use Yajra\Pdo\Oci8;
use League\Container\ReflectionContainer;
$container = new Container();
// Active auto-wiring
$container->delegate(
new ReflectionContainer
);
// Others dependencies
// ...
// Views
$container->add('view', function () {
$templates = new League\Plates\Engine();
$templates->addFolder('web', __DIR__ . '/templates/views/');
$templates->addFolder('emails', __DIR__ . '/templates/emails/');
// Extension
//$templates->loadExtension(new League\Plates\Extension\Asset('/path/to/public'));
//$templates->loadExtension(new League\Plates\Extension\URI($_SERVER['PATH_INFO']));
return $templates;
});
return $container;
routes.php文件
use League\Route\RouteCollection;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
$route = new RouteCollection($container);
// Page index
$route->get('/', 'App\Controller\Main::index');
// Others routes...
return $route;
Main.php
namespace App\Controller;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use League\Plates\Engine;
class Main
{
public function index(ServerRequestInterface $request, ResponseInterface $response, Engine $templates) {
//return $response->getBody()->write($this->templates->render('web::home'));
return $response;
}
}
提前谢谢
修改
我取得了进步。
我扩展了Main类以扩展抽象类BaseController,如下所示:
namespace App\Controller;
use League\Plates\Engine;
class BaseController
{
protected $templates;
public function __construct(Engine $templates) {
$this->templates = $templates;
}
}
第一个错误消失了,但另一个错误出现了。在Main类中,我想使用我在容器中实例化的view
对象,但传递给构造函数的对象是空的:
Main.php
class Main extends BaseController
{
public function index(ServerRequestInterface $request, ResponseInterface $response) {
echo '<pre>'.print_r($this->templates,1).'</pre>'; // Return an empty Plate Engine object
return $response->getBody()->write($this->templates->render('web::home'));
//return $response;
}
}
这并不能解释为什么出现第一个错误
编辑2
经过一番挖掘,我终于让它有效,但我觉得有些不对劲。
我在容器中将术语view
替换为Engine类的命名空间:
$container->add('League\Plates\Engine', function () {
// The same as before
});
在 Main.php 中,我更新了索引函数,如下所示:
public function index(ServerRequestInterface $request, ResponseInterface $response) {
$body = $response->getBody();
$body->write($this->templates->render('web::home'));
return $response->withBody($body);
}
页面不会抛出500错误,并且html文件显示正确。
但是,如果我想通过 Twig 更改模板引擎怎么办?这意味着我需要将$container->get('League\Plate\Engine');
的所有电话号码更改为$container->get('What\Ever');
?那不太实用!
我可能错过了什么!
当我想要使用我的PDO对象......或其他所有对象时,问题会再次出现。
答案 0 :(得分:2)
好的,所以我通过在容器本身注册我的Controllers类来解决我的问题。
例如,为了显示索引页面,Main
类调用index
函数。在我的容器中,我打电话给
$container->add('App\Controller\Main')
->withArgument($container->get('view'));
总结:
bootstap.php (由index.php
调用)
require __DIR__ . '/../../vendor/autoload.php';
$dotenv = new \Dotenv\Dotenv(__DIR__ . '/../');
$dotenv->load();
$config = new Config(__DIR__ . '/../config/');
$container = require __DIR__ . '/../dependencies.php';
$route = require __DIR__ . '/../routes.php';
$response = $route->dispatch($container->get('request'), $container->get('response'));
$container->get('emitter')->emit($response);
<强> dependencies.php 强>
$container = new Container();
// activate auto-wiring
$container->delegate(
new ReflectionContainer
);
// Others dependencies...
// Views
$container->add('view', function () {
$templates = new League\Plates\Engine();
$templates->addFolder('web', __DIR__ . '/templates/views/');
$templates->addFolder('emails', __DIR__ . '/templates/emails/');
// Extension
//$templates->loadExtension(new League\Plates\Extension\Asset('/path/to/public'));
//$templates->loadExtension(new League\Plates\Extension\URI($_SERVER['PATH_INFO']));
return $templates;
});
// THIS IS THE TRICK
$container->add('App\Controller\Main')
->withArgument($container->get('view'));
// others controllers...
return $container;
<强> routes.php文件强>
$route = new RouteCollection($container);
// Page index
$route->get('/', 'App\Controller\Main::index');
// Others routes...
return $route;
答案 1 :(得分:0)
这是有效的,因为您正在向容器注册您的控制器类,并告诉容器依赖注入构造函数中的View类。
您在此处添加的行正在执行此操作:
$container->add('App\Controller\Main')
->withArgument($container->get('view'));
Hello World文档示例完美地解释了它。
http://container.thephpleague.com/3.x/constructor-injection/