How to link Yii's Active Record model table with other table using JOIN - sql

Question

I am using Yii 2.
I have model User with table in DB.
I tried link this table with table auth_assignment which has columns user_id, item_name and created_at using LEFT JOIN clause. I wrote this:
$model = User::find()->leftJoin('auth_assignment AS a', '`a`.`user_id` = `user`.`id`');
Then I attach $model to ActiveDataProvider:
$dataProvider = new ActiveDataProvider([
'query' => $model,
'pagination' => [
'pageSize' => 5,
],
]);
But when I run application it prints only Users columns: screenshot
What I do wrong?

Answer 1

In User model you can't get attributes of another table(auth_assignment ).
You can do it by two ways.
Define relationship between User and auth_assignment table in User model using hasOne()
Example : ( use your model name for auth_assignment table)
public function getAuth()
{
return $this->hasOne(Authassignment::className(), ['id' => 'user_id']);
}
Than you can use auth_assignment table attributes as $model->auth->user_id;
Generate query as array as below, in this scenario you don't need to define relationship in model.
$model = User::find()
->select('user.*,a*')
->leftJoin('auth_assignment AS a', 'a.user_id= user.id')
->asArray();
$dataProvider = new ActiveDataProvider([
'query' => $model,
'pagination' => [
'pageSize' => 5,
],
]);
Now you can use attributes as array variable i.e.
$model['user_id'] etc.