Class Cake\Database\Connection could not be found

Need Help
1

Hi,
I have a new cake application created 4.5.1
The local development is connection without problems.
On the server I get the error:

Datasource class Cake\Database\Connection could not be found

This is may config in app.php:
‘Datasources’ => [

    'default' => [
        'className' => Connection::class,
        'driver' => Mysql::class,
        'persistent' => false,
        'timezone' => 'UTC',
        'flags' => [],
        'cacheMetadata' => true,
        'log' => false,
        'quoteIdentifiers' => false,
    ],

In app_local.php I have entered the login data.

The first access is raising the error:

public function home() {
    $this->log('PageController  Home');
            $catTable = TableRegistry::get('Categories');
    $categorie = $catTable->find()
            ->where(['title' => 'Home'])
           ->toList();

    //dd($categorie[0]->id);
    $departTable =$this->getTableLocator()->get('Departments');
    $newcat = $departTable->find()
            ->where(['title' => 'HomeNews'])
            ->toList();

    $articles = $this->getTableLocator()->get('Articles');

    $homepage = $articles->find()
            ->where(['category_id' => $categorie[0]->id])
            ->order(['department_id' => 'ASC'])
            ->toArray();

    $news = $articles->find()
            ->where(['department_id' => $newcat[0]->id])
            ->toArray();

    $this->set(compact('homepage', 'news'));
}

On this server I have two other cake application running without problems. I compared the configuration and found the onla difference:

        'className' => 'Cake\Database\Connection',
        'driver' => 'Cake\Database\Driver\Mysql',

But changing these settings brought no result.
Where do I have to look further? What to check?
Kind regards
Klaus

2

This feels weird because cakephp/src/Database/Connection.php at 4.x · cakephp/cakephp · GitHub does indeed exist.

Also the fact that you use the class constant Connection::class means this class actually is present in your filesystem.

Maybe try giving us a full stacktrace if the error.

3

Sure Kevin,

Request URL: /
Client IP: 176.199.252.125
2024-01-25 17:44:04 warning: DebugKit is disabling itself as your host cake.verein-lebensalter.de is not in the known safe list of top-level-domains (localhost, invalid, test, example, local). If you would like to force DebugKit on use the DebugKit.forceEnable Configure option.
2024-01-25 17:44:04 error: AppController Init
2024-01-25 17:44:04 error: PageController Init
2024-01-25 17:44:04 error: PageController Home
2024-01-25 17:44:04 error: [Cake\Datasource\Exception\MissingDatasourceException] Datasource class Cake\Database\Connection could not be found. in /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/Datasource/ConnectionRegistry.php on line 57
Exception Attributes: array (
‘class’ => ‘Cake\Database\Connection’,
‘plugin’ => NULL,
)
Stack Trace:

  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/Core/ObjectRegistry.php:103
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/Datasource/ConnectionManager.php:214
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/ORM/Locator/TableLocator.php:255
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/Datasource/Locator/AbstractLocator.php:68
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/ORM/Locator/TableLocator.php:206
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/ORM/TableRegistry.php:95
  • /var/www/web489/html/cakephp/src/Controller/PagesController.php:56
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/Controller/Controller.php:560
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/Controller/ControllerFactory.php:140
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/Controller/ControllerFactory.php:115
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/Http/BaseApplication.php:325
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/Http/Runner.php:86
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/Http/Middleware/CsrfProtectionMiddleware.php:166
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/Http/Runner.php:82
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/Http/Middleware/BodyParserMiddleware.php:157
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/Http/Runner.php:82
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/Routing/Middleware/RoutingMiddleware.php:189
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/Http/Runner.php:82
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/Routing/Middleware/AssetMiddleware.php:68
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/Http/Runner.php:82
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/Error/Middleware/ErrorHandlerMiddleware.php:149
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/Http/Runner.php:82
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/Http/Runner.php:67
  • /var/www/web489/html/cakephp/vendor/cakephp/cakephp/src/Http/Server.php:99
  • /var/www/web489/html/cakephp/webroot/index.php:40
  • [main]:

Request URL: /
Client IP: 176.199.252.125

4

This doesn’t make sense… This would mean if you do

var_dump(class_exists('Cake\Database\Connection'));

in your AppController initialize method it would return false - meaning something is wrong with your composer autoloader.

I’d recommend you re-install your vendor modules via

rm -rf vendor composer.lock
composer install --prefer-dist
5

Thanks Kevin,

I only made a local composer update und uploaded the vendor folder.
Additional the composer.lock , and the rror is gone.
The first upload of the application seams to produced the error.
Regards Klaus