Контроллер
$activity_session = array();
foreach($activities_by_category as $activity)
{
$activity_session[] = $this->users_model->search_sessions_by_activity($activity->activity_id);
}
Модель
function search_sessions_by_activity($activity_id){
$this->db->where('activity_by_id',$activity_id);
$query = $this->db->get('activity_session');
return $query->result();
}
Получение объектов json в виде массива
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