Error trying to connect database Slim Message: Class "App\Models\Database" not found

Question

我无法使用 slim 版本 4 连接数据库

这是我在公共文件夹中的 index.php

当我在新数据库中单击（CTRL+左键单击）或使用 App\Models\Database 时；它在我的 db.php 文件上的我的班级数据库中是正确的

<?php

use Psr\Http\Message\ResponseInterface as Response;
use Psr\Http\Message\ServerRequestInterface as Request;
use Selective\BasePath\BasePathMiddleware;
use Slim\Factory\AppFactory;

require_once __DIR__ . '/../vendor/autoload.php';



$app = AppFactory::create();

// Add Slim routing middleware
$app->addRoutingMiddleware();

// Set the base path to run the app in a subdirectory.
// This path is used in urlFor().
$app->add(new BasePathMiddleware($app));

$app->addErrorMiddleware(true, true, true);

// Define app routes
$app->get('/', function (Request $request, Response $response) {
    $response->getBody()->write('Hello, World!!');
    return $response;
})->setName('root');


use App\Models\Database;

$app->get('/customers/all', function (Request $request, Response $response) {
    $query = "SELECT * FROM customers";

    try {
        $db = new Database();
        $conn = $db->connect();


    } catch (PDOException $error) {
        $error = array(
            "message" => $error->getMessage()
        );

        $response->getBody()->write(json_encode($error));
        return $response
            ->withHeader('Content-Type', 'applications/json')
            ->withStatus(500);
    }
});

//customers Routes
require __DIR__ . './../routes/customers.php';

// Run app
$app->run();

这是我在配置文件夹中的 db.php 文件

<?php

namespace App\Models;

use \PDO;

class Database
{
    private $host = 'localhost';
    private $user = 'root';
    private $pass = '';
    private $dbname = 'slim-api';

    public function connect()
    {
        $conn_str = "mysql:host=$this->host;dbname=$this->dbname";
        $conn = new PDO($conn_str, $this->user, $this->pass);
        $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

        return $conn;
    }
}
?>

我试图在 slim v4 中连接我的数据库 mysql，但我得到的是一条错误消息：找不到类“App\Models\Database”