使用 Slim 3 在 class 中获取依赖注入

Question

我有 DI 的问题，这对我来说是新的。我想在我的项目 class 中将容器作为 DI，但出现错误：

Argument 1 passed to Project::__construct() must be an instance of Slim\Container, none given

我创建了一个 class 项目：

use Slim\Container;

class Project {

    protected $ci;

    public function __construct(Container $ci) {
        $this->ci = $ci;
    }
}

这是我的 DIC 配置：

//dependencies.php
$container = $app->getContainer();

$container[Project::class] = function ($c) {
    return new Project($c);
};

这里是我的代码 index.php 到运行代码

    // Instantiate the app
    $settings = require __DIR__ . '/../app/configs/settings.php';

    $app = new \Slim\App($settings);

    // Set up dependencies
    require __DIR__ . '/../app/configs/dependencies.php';
    // Register middleware
    require __DIR__ . '/../app/configs/middleware.php';
    // Register routes
    require __DIR__ . '/../app/configs/routes.php';
    require __DIR__ . '/../app/model/Project.php';


    $app->get('/project/{id}', function (Request $request, Response $response) {
        $project = new Project();
        return $response;
    });
    $app->run();

我不知道我在哪里失败了，我什至尝试使用 slim-brige，但我得到了相同的结果。我还尝试提供一个字符串而不是容器，但我仍然得到 null

Answer 1

Argument 1 passed to Project::__construct() must be an instance of Slim\Container, none given

好吧，确实没有给构造函数任何参数：

$app->get('/project/{id}', function (Request $request, Response $response) {
    $project = new Project(); // You should pass container instance here, but you don't
    return $response;
});

由于您已经在容器中注册了Project class，您可以从容器中获取实例：

$app->get('/project/{id}', function (Request $request, Response $response) {
    $project = $this->container->get('Project'); // Get Project instance from the container, you have already registered it
    return $response;
});

使用 Slim 3 在 class 中获取依赖注入

Get Dependency Injection in a class with Slim 3

php

dependency-injection

slim