How do i catch beforeAction event from any class and change layout?

[mithun12000]

I am trying to achieve this to create a theme. but i don't know how i can achieve. I have gone through you doc too.

[cebe]

why do you need beforeAction to change the layout? What are you trying to achieve?

[mithun12000]

I am creating a theme. now default layout can be anything, but when you activate theme then it will overwrite layout to change UI.

[qiangxue]

You can class-level events: https://github.com/yiisoft/yii2/blob/master/docs/guide/concept-events.md#class-level-event-handlers You can attach your event handler during bootstrap of the application: https://github.com/yiisoft/yii2/blob/master/framework/base/Application.php#L173

[mithun12000]

Hi qiangxue,

how can i make use of You can attach your event handler during bootstrap of the application: https://github.com/yiisoft/yii2/blob/master/framework/base/Application.php#L173?

could you explain what can be done through this and how it can be specify?

I have config some thing like:

[
    'id' => 'Test Application',    
    'vendorPath' => dirname(dirname(__DIR__)) . '/vendor',
    'extensions' => require(dirname(dirname(dirname(dirname(__DIR__)))) . '/extensions/extensions.php'),
    'components' => [
        'cache' => [
            'class' => 'yii\caching\FileCache',
        ],
        'db' => [
            'class' => 'yii\db\Connection',
            'dsn' => 'mysql:host=localhost;dbname=tc_backend',
            'username' => 'root',
            'password' => '',
            'charset' => 'utf8'
        ],
        'authManager' => [
            'class' => 'yii\rbac\DbManager', // THIS IS YOUR AUTH MANAGER
            'db'    => 'db',
            'assignmentTable' => 'user',
        ],
    ],
];

extensions will hold component/extension configuration.

[qiangxue]

You need to create a class and list it in Application::bootstrap. Within this class, you can register the class-level event handler for yii\web\Controller::EVENT_BEFORE_ACTION event.

[mithun12000]

sorry my question is similar but yet it is a different here i am trying to make it work this bootstrap feature.

my extension config:

'adminUi' => 
    array (
        'name' => 'adminUi',
        'version' => '1.0',
                'bootstrap' => 'yii/adminUi/AdminUiBootstrap',
        'alias' => 
        array (
            '@yii/adminUi' => $vendorDir . '/adminUi',
            '@vendor/adminUi/assets/' => $vendorDir . '/adminUi/assets',
            '@app/themes/adminui' => $vendorDir . '/adminUi/themes/',
        ),
    ),

path

[root]
|_extension
|_app
|        |application
|                          |_backend
|_framework

$vendorDir = [root]/extension

Now when i am trying to make this work i always get reflection error

ReflectionException
Class yii/adminUi/AdminUiBootstrap does not exist

but file already exist in [root]/extension/adminUi/AdminUiBootstrap also this is implemented BootstrapInterface.

may i know where is the error?

[mithun12000]

also

bootstrap file def:

namespace yii\adminUi;
use Yii;
use yii\base\Application;
use yii\base\BootstrapInterface;

class AdminUiBootstrap implements BootstrapInterface{
    public function bootstrap($app){
        print_r($app);
    }
}

[qiangxue]

You didn't specify the class name correctly. Please read the guide first: https://github.com/yiisoft/yii2/blob/master/docs/guide/concept-autoloading.md https://github.com/yiisoft/yii2/blob/master/docs/guide/structure-applications.md#yiibaseapplicationbootstrapbootstrap-

[mithun12000]

Thanks. find my error.

yii/adminUi/AdminUiBootstrap should be yii\adminUi\AdminUiBootstrap