Use Master yii2 activerecord trait

MasterTrait.php

<?php
namespace common\models;

trait MasterTrait
{
    public static function getDb()
    {
        $connection = clone \Yii::$app->getDb();
        $connection->enableSlaves = false;
        return $connection;
    }
}

usage.php

<?php

class User extends ActiveRecord
{
    use MasterTrait;
}

/**
 * Fetch all users from master server
 */
User::find()->all();