public async Task <ActionResult <AddCommentResponse> > PostComment(long movieId, AddCommentRequest commentRequest) { var movie = await _context.Movies.Include(movie => movie.Comments).FirstOrDefaultAsync(movie => movie.Id == movieId); User user; if (commentRequest.Author != null) { user = commentRequest.Author; } else { user = _context.User.Where(user => user.Id == commentRequest.UserId).First(); } var comment = CommentMapper.mapFormAddCommentRequestToComment(commentRequest); comment.Author = user; movie.Comments.Add(comment); await _context.SaveChangesAsync(); return(Ok(CommentMapper.mapFromCommentToAddCommentResponse(comment))); }