使用数据库配置的Init应用程序组件

Question

I'm building a Yii2 application that sends email through the swiftmailer extension. I store the email settings (smtp, ssl, username, etc..) in a database table, to be able to edit them with an apposite view. How can I init swiftmailer with config from the db table?

Thank you.

Answer 1

You can initialize application components using set() method available through application object Yii::$app:

use Yii;

...

// Get config from db here

Yii::$app->set('mailer', [
    'class' => 'yii\swiftmailer\Mailer',
    'transport' => [
        'class' => 'Swift_SmtpTransport',
        // Values from db
        'host' => ... 
        'username' => ...
        'password' => ...
        'port' => ...
        'encryption' => ...
    ],
]);

Then use it as usual:

use Yii;

...

Yii::$app->mailer->...

If you want to use the same configuration from database for the whole application, you can get and apply this config during application bootstrap.

Create custom class and place it for example in app/components;

namespace app\components;

use yii\base\BootstrapInterface;

class Bootstrap implements BootstrapInterface
{
    public function bootstrap($app)
    {
        // Put the code above here but replace Yii::$app with $app
    }
}

Then add this in config:

return [
    [
        'app\components\Bootstrap',
    ],
];

Note that:

If a component definition with the same ID already exists, it will be overwritten.

Official documentation:

• BootstrapInterface
• Mailer