/**
* Associate matters.
*
* @param AssociateMatterRequest $request
* @param int $teacher_id
* @return array
*/
public function associateMatters(AssociateMatterRequest $request, $teacher_id)
{
$teacher = $this->repo->get($teacher_id);
$this->repo->associateMatters($teacher, $request->only('matters'));
return ['status' => 'ok'];
}