Yii2 MySQL how to prevent duplicate select query - mysql

Question

I saw in my debug menu that I have some duplicate select queries. In particular, this is the one that I got 4 times SELECT * FROM page_adminlang WHERE (language=bg) AND (page_id=1) in 4 different files. Is there a right way to prevent such situations and is this big hit on the site speed performance? Shall I retrieve the row in some variable like $page = PageAdmin::findOne(1) and than call it where I need and is this the right way? I red other articles but they were mainly for duplicate rows on insertion. Not familiar with MySQL performance tuning but want to go deeper in this area.Thank you in advance!

Answer 1

Option 1 - Configure MemCache Component
An Easier method is to enable db caching, then it won't matter, put a 5second duration at first.
In your component db connection settings set the following properties:
'components' => [
'db' => [
'class' => 'yii\db\Connection',
'dsn' => 'mysql:host=localhost;dbname=dbname',
'username' => 'root',
'password' => 'password',
'charset' => 'utf8',
....
'enableQueryCache' => true,
'queryCacheDuration' => 5, // five seconds
....
]
]
See:
https://www.yiiframework.com/doc/guide/2.0/en/caching-data
https://www2.0/yii-db.yiiframework.com/doc/api/-connection
Option 2 - Custom query with cache
public function getResults()
{
// Cache expires every x seconds (60sec/min * 60min/hr * 6hrs)
$duration = 60*60*6;
$sql_query = "SELECT * FROM some_table";
return Yii::$app->db->createCommand($sql_query)->cache($duration)->queryAll();
}

Answer 2

I don't usually face that issue, but if I have to retrieve something from the database multiple times (and I know that won't change), I do something like that in my model
private $_myData = null;
public function getMyData() {
if ($this->_myData !== null) return $this->_myData;
$this->_myData = //query your data;
return $this->getMyData();
}