同时使用PHP League中的Route和Container不能创建响应

编程问答 2022-08-15

问题描述

我正在重写一个PHP应用程序，该应用程序在过去十年中得到了发展，并选择了League \ Route，League \ Container和Aura \ sql来建立坚实的基础。 我在将路由器中的所有组件连接在一起时遇到了麻烦-其他组件似乎可以正常工作：

索引：

    $container = new League\Container\Container;
    $container->defaultToShared(); // Added along the line - not sure whether this is needed
    $container->delegate( new League\Container\ReflectionContainer ); // Enable auto wiring
    
    $container
        ->add('dbpro',Aura\sql\ExtendedPdo::class)
        ->addArgument('pgsql:dbname=app client_encoding=UTF8')
        ->addArgument('app')
        ->addArgument(NULL)
        ->addArgument($db_attributes);
    
    $container->add('modl_party',App\Model\Party::class)
      ->addArgument('dbpro');
    $container->add('ctrl_party',App\Controllers\Party::class)
      ->addArgument('modl_party');
    $container
        ->addServiceProvider('App\ServiceProvider\LaminasDiactorosServiceProvider');
    
    $strategy = (new League\Route\Strategy\ApplicationStrategy)->setContainer($container);
    $router   = (new League\Route\Router)->setStrategy($strategy);
    
    $router->group('/API/v1',function (\League\Route\RouteGroup $route)
    {
      $route->map('GET','/party/{id}','App\Controllers\Party::get');
      $route->map('GET','/parties/{dos_nr}','App\Controllers\Parties::get');
    });
    
    try {
        $response = $router->dispatch(
            $container->get('Laminas\Diactoros\ServerRequest'),$container->get('Laminas\Diactoros\Response')
        );
    } catch (League\Route\Http\Exception\NotFoundException $e) {
        $response = $container->get('Laminas\Diactoros\Response');
        $response->getBody()->write($e->getMessage());
        $response = $response->withStatus($e->getStatusCode());
    }
    
    $container->get('Laminas\Diactoros\Response\SapiEmitter')->emit($response);

控制器：

    namespace App\Controllers;
    
    use Psr\Http\Message\ResponseInterface;
    use Psr\Http\Message\ServerRequestInterface;
    use Laminas\Diactoros\Response;
    
    class Party {
    
      protected $party;
    
      public function __construct( \App\Model\Party $party )
      {
        $this->party = $party;
      }
    
      public function get(ServerRequestInterface $request,array $args) : ResponseInterface
      {
        $party  = $this->party->get( $args['id'] );
        $body     = json_encode( $party );
        $response = new Response;
        $response->getBody()->write($body);
        return $response
          ->withAddedHeader('content-type','application/json')
          ->withStatus(200);
      }
    
    }

型号：

    namespace App\Model;
    
    use \Aura\sql\ExtendedPdo;
    
    class Party {
    
      protected $pdo;
      protected $table;
      public $id;
    
      public function __construct( \Aura\sql\ExtendedPdo $pdo ) {
        $this->pdo = $pdo;
        $this->table = 'parties';
      }
    
      public function get( $id )
      {
        $sql    = "SELECT ...";
        $binds  = array( 'id' => $id );
        $obj = $this->pdo->fetchObject( $sql,$binds,'App\Model\Party',[$this->pdo] );
        return $obj;
      }
    }

结果：

$ curl <URI>/API/v1/party/15285

<b>Fatal error</b>:  Uncaught League\Container\Exception\NotFoundException: Unable to resolve a value for parameter (dsn) in the function/method (__construct) in [...]/vendor/league/container/src/Argument/ArgumentResolverTrait.PHP:79
Stack trace:
#0 [internal function]: League\Container\ReflectionContainer-&gt;League\Container\Argument\{closure}(Object(ReflectionParameter))
#1 [...]/vendor/league/container/src/Argument/ArgumentResolverTrait.PHP(84): array_map(Object(Closure),Array)
#2 [...]/vendor/league/container/src/ReflectionContainer.PHP(52): League\Container\ReflectionContainer-&gt;reflectArguments(Object(ReflectionMethod),Array)
#3 [...]/vendor/league/container/src/Container.PHP(183): League\Container\ReflectionContainer-&gt;get('Aura\\sql\\Extend...')
#4 [...]/vendor/league/container/src/Argument/ArgumentResolverTrait.PHP(45): League\Container\Container-&gt;get('Aura\\sql\\Extend...')
#5 [...]/vendor/league/container/src/Argument/ArgumentResolverTrait.PHP(86): League\Contai in <b>[...]/vendor/league/container/src/Argument/ArgumentResolverTrait.PHP</b> on line <b>79</b>

其他信息：

  • 我可以从容器中成功获取ExtendedPdo实例
  • 我可以从容器和':: get（15285）'中成功获取App \ Model \ Party实例
  • 我可以从容器和':: get（15285）'中成功获取App \ Controllers \ Party实例
  • 我也使用文档中提供的示例尝试了JsonStrategy，但是得到了相同的结果
  • 我未包含LaminasDiactorosServiceProvider.PHP代码，但这与文档中的示例相同（除了将“ Zend”替换为“ Laminas”之外）

->我认为错误一定是路由器“构建”响应方式的某个地方？

解决方法

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containersdependency-injectionroutesroutesthephpleague