[英]SLIM3 - Accessing Database container in own Class
我正在Slim 3應用程序中編寫自己的類。 我想有一個自己的課來處理數據庫查詢。 代碼如下:
<?php
class DatabaseOperator {
private $dbconnection;
function __construct($dbconnection) {
$this->dbconnection = $dbconnection;
}
public function getUserPermissions($user_id) {
$user_permissions = "SELECT list_id FROM permissions WHERE user_id='$user_id'";
$sth = $dbconnection->prepare($user_permissions);
$sth->execute();
$user_permissions_result = $sth->fetchAll();
$result_permissions = array();
foreach ($user_permissions_result as $row) {
$list_id = $row['list_id'];
$this->logger->info("User has access to List ID: " . $list_id);
array_push($result_permissions, $list_id);
}
return $result_permissions;
}
public function getUserID($username) {
$sqluser = "SELECT user_id FROM users WHERE username='$username'";
// TODO: Android REG_ID from DB
$sth = $dbconnection->prepare($sqluser);
$sth->execute();
$res = $sth->fetch(PDO::FETCH_ASSOC);
return $res['user_id'];
}
}
?>
在我的routes.php中,我得到了如下信息:
$app->get('/login', function (Request $request, Response $response, array $args) {
$username = $request->getServerParam('PHP_AUTH_USER');
if (isset($username)) {
$this->logger->info("Authenticated user: " . $username);
$databaseOperator = new DatabaseOperator($this->db);
$user_id = $databaseOperator->getUserID($username);
但是訪問路線給我這個錯誤:
由於出現以下錯誤,該應用程序無法運行:
在null上調用成員函數prepare()
文件:/var/www/vhosts/hosting114426.a2f69.netcup.net/httpdocs/rememberly/classes/DatabaseOperator.php行:25
跟蹤<#0 /var/www/vhosts/hosting114426.a2f69.netcup.net/httpdocs/rememberly/src/routes.php(209):DatabaseOperator-> getUserID('testuser')
因此$ dbconnection為null似乎存在問題。 但是,如果在我的routes.php中使用$this->db->prepare(QUERY)
,它將正常工作。 因此$ this-> db不為null。
那么這是什么問題呢?
<?php
$slimSettings = [
/* ... */
];
$container = new \Slim\Container(['settings' => $slimSettings]);
$container['db'] = function ($c) {
$dns = ''; // PDO dns
$dbUser = ''; // database user
$dbPass = ''; // database password
return new \PDO($dns, $dbUser, $dbPass);
};
/* ... */
$app = new \Slim\App($container);
/* ... */
$app->get('/login', function (Request $request, Response $response, array $args) {
$username = $request->getServerParam('PHP_AUTH_USER');
if (isset($username)) {
$this->logger->info("Authenticated user: " . $username);
$databaseOperator = new DatabaseOperator($this->db);
$user_id = $databaseOperator->getUserID($username);
}
});
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