Django: redirect url if slug is wrong

Question

I have a function that is run every view to correct slugs. For example if the slug is /12-post-about-stuff and a user enters /12-post-abot_stof they will be redirected correctly. The problem is that the different views have different url patterns for example:

/posts/post_slug/
...
/posts/post_slug/comments/new

how to I write a function that redirects by fixing the slug name based on the current url?

Edit: I am applying a decorator to every view with a board_name and pk argument. What I don't know is how to dynamically return the new url because the url format is different for each view.

def correct_board_url_name(func):
  def wrapper(request, board_slug):
        try:
            pk = int(board_slug.split('-')[0])
            board = Board.objects.get(pk=pk)
            if (board.slug != board_slug):
                # This does not always work depending on what is entered
                return redirect(request.get_full_path().replace(board_slug, board.slug, 1))
            else:
                return func(request, board_slug)
        except:
            raise Http404('')
    return wrapper

How do you plan on matching the bad url to the correct url? Is it based on the PK 12? Are you using class based or function based views? — Cory Madden, Jul 30 '17 at 22:38
May be `resolve` help you: https://docs.djangoproject.com/en/1.11/ref/urlresolvers/#resolve and it https://stackoverflow.com/questions/2491605/how-to-get-the-current-urlname-using-django — Brown Bear, Jul 31 '17 at 03:59

score 2 · Accepted Answer · answered Jul 31 '17 at 18:04

A middleware is a good choice if you want to process requests in many different views.

class RedirectMiddleware(object):
    def process_request(self, request):
        if request.resolver_match.app_name == 'posts' \
                and 'post_slug' in request.resolver_match.kwargs: 
            new_path = None
            # your logic here
            if new_path:
                return redirect(new_path, permanent=True)
        return

In settings:

MIDDLEWARE = [
    # another middlewares here ...
    'path.to.RedirectMiddleware',
]

Django: redirect url if slug is wrong

1 Answers1