Assume that you have teachers and students model.
 
 
 
```php 
teacher model has: person_id,id_teacher,name,surname,bachelor,master,etc student model has: person_id,id_student,name,surname, age, apartment ```
 
 
(person_id is a global id both of teachers and students) Now we want an CArrayProvider like that PERSONS DETAILS}

//from merge withe second data collection
$test = 0;
foreach ($t2 as $v) {
$res[$v->person_id] = array_merge(isset($res[$v->person_id]) ? $res[$v->person_id] : array(), $v->attributes);
}