/**
  * Get all tasks
  * @return array
  */
 public function getAllTasks()
 {
     $query = 'SELECT * FROM tasks';
     $stmt = $this->conn->query($query);
     $objects = $stmt->fetchAll(\PDO::FETCH_ASSOC);
     $tasks = array();
     foreach ($objects as $k => $obj) {
         $task = new \Todo\Model\Task($obj);
         $tasks[] = $task;
     }
     return $tasks;
 }