Django Writes Custom Decorator

Question

I am creating a forum. When processing URLs, the board ID and board name are displayed. The name is for reading, and the identifier is the board choice. This means that if the name is incorrect or changed, I want to redirect the user to the correct URL. Some searches led me to decorators, but I can not find a single resource explaining how to use them.

# urls.py
...
url(r'^boards/(?P<board_id>\d+)/(?P<board_name>[^/]+)/$', views.board, name='board'),
...

# views.py
@redirect_if_wrong_boardname
def board(request, board_id, board_name):
    ...
    return render(request, 'forums/board.html', {'board': board})

How to implement the following logic in a designer?

board = Board.objects.all().get(pk=pk)
    if (board.name != name):
        return redirect(request.get_full_path().replace(name, board.name, 1))

Answer 1

After some speculation, my brother’s help, and stumbling over some good messages, I realized this:

# views.py
def redirect_if_wrong_boardname(func):
    def wrapper(request, board_id, board_name):
        try:
            board = Board.objects.get(pk=board_id)
            if (board.name != board_name):
                return redirect('/boards/' + board.pk + '/' + board.name)
            else:
                return func(request, board_id, board_name)
        except:
            return Http404('Board not found')
    return wrapper

@redirect_if_wrong_boardname
def board(request, board_id, board_name):
    ...
    return render(request, 'forums/board.html', {'board': board})