如何在yii2中设置查询构建器的连接？

Question

我想使用QueryBuilder：

$rows = (new \yii\db\Query())
    ->select('id, name')
    ->from('user')
    ->limit(10)
    ->all();

使用非默认连接：

\Yii::$app->get('db_mysql')

如何正确执行此操作？

Answer 1

使用：

$rows = (new \yii\db\Query())
    ->select('id, name')
    ->from('user')
    ->limit(10)
    ->all(\Yii::$app->db_mysql);

当然，您必须db_mysql在配置中设置组件

文件：

/**
 * Executes the query and returns all results as an array.
 * @param Connection $db the database connection used to generate the SQL statement.
 * If this parameter is not given, the `db` application component will be used.
 * @return array the query results. If the query results in nothing, an empty array will be returned.
 */
public function all($db = null)
{
    $rows = $this->createCommand($db)->queryAll();
    return $this->populate($rows);
}