Using Gii to create room, customer, and reservation models

Yii2 provides a powerful tool to generate models, controllers, and CRUD (create, read, update, and delete) actions, forms, modules, and extensions: Gii.

At the bottom of the basic/config/web.php file, placed in the basic standard configuration, there is a block of code that enables Gii:

if (YII_ENV_DEV) {
    // configuration adjustments for 'dev' environment
    $config['bootstrap'][] = 'debug';
    $config['modules']['debug'] = 'yii\debug\Module';

    $config['bootstrap'][] = 'gii';
    $config['modules']['gii'] = 'yii\gii\Module';
}

Verify that these lines are present, otherwise append them at the bottom of the web.php file before the return $config statement. The last check is in basic/web/index.php. Verify that YII_ENV is dev, with this line:

defined('YII_ENV') or define('YII_ENV', 'dev')...