[EMAIL PROTECTED] wrote:
> Hello -
>
> I'm playing around with a blog application and I want it to have a
> tagging feature. I have the usual ManyToMany relationship set up with
> Post and Tag (I'm not going to past my model since I think everyone is
> familiar with this kind of setup).
>
> I have three Posts tagged as follows:
>
> Post1: articles, python, django
> Post2: articles, python
> Post3: articles, music
>
> Essentially, I would like to be able to go to a URL like:
>
> http://blog/tag/articles/python/django
>
> And get Post1 as a result.
>
> Likewise, I'd like to go to:
>
> http://blog/tag/articles/python
>
> And get Post1 and Post3 as a result.
>
> I have a URL entry set up as follows:
>
> (r'^blog/tag/(.*)', 'ssrc.blog.views.tags'),
Using .* in your URL regexes is not recommended, you only want to match
what you absolutely need to match. Something like the following would
be better:
(r'^tags/(?P<url>([a-zA-Z0-9-]+/)+)$', 'ssrc.blog.views.tags')
This would only allow one or more tags with each tag consisting of one
or more of the characters a-z, A-Z, 0-9, and/or hyphens. The (?P<url>
snip ) part creates a named group, so a parameter named url will be
passed to your view.
> I have my tags view set up like so:
>
> def tags(request, url=""):
> if url:
> posts = {}
> for post in Post.objects.all():
> for tag in [part for part in url.split("/") if part != ""]:
> try:
> post.tags.get(name__exact=tag)
> posts[post.id] = post
> except:
> posts[post.id] = None
> results = [post for post in posts.values() if post != None]
> if len(results) == 0:
> raise Http404
> else:
> return render_to_response("blog/tags.html", {
> 'posts': results,
> })
>
> This works. My question is just if there's a better way to accomplish
> this. I realize that it'd be a lot cleaner if I just used hierarchical
> categories. However, I'd like to keep this as flexible as possible by
> using simple tags.
This could be very much simplified now, and with the regex I mentioned
above, the view would turn into something like:
def tags(request, url):
# Don't need the last item in the list since it will
# always be an empty string since Django will append
# a slash character to the end of URLs by default.
tags = url.split('/')[:-1]
posts = Post.objects.filter(tags__name__in=tags)
return render_to_response("blog/tags.html", {'posts': posts})
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