如何使用 PDO 连接 Slim 框架中的 Postgresql 数据库？

如何解决如何使用 PDO 连接 Slim 框架中的 Postgresql 数据库？

我在超薄框架中使用 MYSQL 数据库。它完美地工作。 但是要连接Postgresql，它也连接不上。

这是示例编码：(settings.php)

    declare(strict_types=1);
    use App\Application\Settings\Settings;
    use App\Application\Settings\SettingsInterface;
    use DI\ContainerBuilder;
    use Monolog\Logger;
    
    return function (ContainerBuilder $containerBuilder) {
    
        $containerBuilder->addDefinitions([
            SettingsInterface::class => function () {
                return new Settings([
                    'displayErrorDetails' => true,// Should be set to false in production
                    'logError'            => true,'logErrorDetails'     => true,'logger' => [
                        'name' => 'slim-app','path' => isset($_ENV['docker']) ? 'php://stdout' : __DIR__ . '/../logs/app.log','level' => Logger::DEBUG,],"db" =>
                               [
                                'driver'   => 'pgsql','host'     => 'localhost','port'     => '5433','database' => 'test_db','username' => 'postgres','password' => 'password','prefix'   => '','schema'   => 'public',]
    
                    ]);
            }
        ]);
};

代码如下：(dependencies.php)

<?php
declare(strict_types=1);

use App\Application\Settings\SettingsInterface;
use DI\ContainerBuilder;
use Monolog\Handler\StreamHandler;
use Monolog\Logger;
use Monolog\Processor\UidProcessor;
use Psr\Container\ContainerInterface;
use Psr\Log\LoggerInterface;

return function (ContainerBuilder $containerBuilder) {
    $containerBuilder->addDefinitions([
        LoggerInterface::class => function (ContainerInterface $c) {
            $settings = $c->get(SettingsInterface::class);

            $loggerSettings = $settings->get('logger');
            $logger = new Logger($loggerSettings['name']);

            $processor = new UidProcessor();
            $logger->pushProcessor($processor);

            $handler = new StreamHandler($loggerSettings['path'],$loggerSettings['level']);
            $logger->pushHandler($handler);

            return $logger;
        },PDO::class => function (ContainerInterface $c)
          {
 
            $settings = $c->get(SettingsInterface::class);
 
            $dbSettings = $settings->get("db");
 
            $host = $dbSettings['host'];
            $dbname = $dbSettings['database'];
            $username = $dbSettings['username'];
            $password = $dbSettings['password'];
            $port = $dbSettings['port'];
            $dsn = new PDO ("pgsql:host=$host;port=$port;dbname=$dbname");
           return new PDO($dsn,$username,$password);

        },]);
};

这里检查数据库连接：(routes.php)

<?php
declare(strict_types=1);

use App\Application\Actions\User\ListUsersAction;
use App\Application\Actions\User\ViewUserAction;
use Psr\Http\Message\ResponseInterface as Response;
use Psr\Http\Message\ServerRequestInterface as Request;
use Slim\App;
use Slim\Interfaces\RouteCollectorProxyInterface as Group;

return function (App $app) {
    $app->options('/{routes:.*}',function (Request $request,Response $response) {
        // CORS Pre-Flight OPTIONS Request Handler
        return $response;
    });

    $app->get('/',Response $response) {
        $response->getBody()->write('Hello world!');
        return $response;
    });

    $app->group('/users',function (Group $group)
    {
        $group->get('',ListUsersAction::class);
        $group->get('/{id}',ViewUserAction::class);
    });

    $app->post('/db-select',Response $response)
    {
        $db = $this->get(PDO::class);
        $sth = $db->prepare("SELECT * FROM login");
        $sth->execute();

        $data = $sth->fetchAll(PDO::FETCH_ASSOC);
        $payload = json_encode($data);
        $response->getBody()->write($payload);
        return $response->withHeader('Content-Type','application/json');
    });

};

如果我运行诸如 localhost:8000/db-select 之类的命令，它会给我以下错误：

{
    "statusCode": 500,"error": {
        "type": "SERVER_ERROR","description": "SQLSTATE[08006] [7] fe_sendauth: no password supplied"
    }
}

我为 MYSQL 编写了示例代码，它运行良好。 Postgresql 连接还遗漏了什么？

解决方法

检查 PostgreSQL 扩展是否已启用

扩展=pdo_pgsql

你也可以从这个问题中寻求帮助

fe_sendauth: no password supplied error in postgresql + laravel

,

这是一个错误：

$dsn = new PDO ("pgsql:host=$host;port=$port;dbname=$dbname");

return new PDO($dsn,$username,$password);

试试这个：

return new PDO("pgsql:host=$host;port=$port;dbname=$dbname",$password);