public async Task <IActionResult> GetById(int id)
{
AssignmentWithConcrete assignment =
await _assignmentService.GetAssignmentById(id, _userService.UserId, x => x.Subject,
x => x.Attachments);
if (assignment == null)
{
return(NotFound());
}
if (!await _assignmentService.CheckUserAsync(assignment.Assignment, _userService.UserId))
{
return(Forbid());
}
return(Ok(_mapper.Map <AssignmentDetailsDtoStudent>(assignment)));
}