I am working on a sample project and I have the following scenario. I have 3 views that were initially simple function based views the only difference between them was that each has different query sets based on a slug in the url yet using the same template file which is for listing posts.

Example:
views.py

def index(request):    
    allposts = Post.objects.order_by('created')
    return direct_to_template(request,'postlist.html',{'posts':allposts})

def showcategory(request,slug):
    categposts = Post.objects.filter(category__slug=slug).order_by('created');
    return direct_to_template(request,"postlist.html",{"posts":categposts})

def showtag(request,tagslug):
    posts_with_tag = Post.objects.filter(tags__name__in=[tagslug]).order_by('created')
    return direct_to_template(request,"postlist.html",{"posts":posts_with_tag})

urls.py

urlpatterns = patterns('',
    url(r'^$','blog.views.index', name='home'),
    url(r'^tag/(?P<tagslug>[-\w]+)/$','blog.views.showtag',name='showtag'),
    url(r'^(?P<slug>[-\w]+)/$','blog.views.showcategory',name='showcategory'),
)

That looked pretty redundant to me given that all 3 views are returning the same template with different querysets so I though I'll just use generic class based ListView. I also subclassed it for some customization, something like this:

class ListPosts(ListView):
        template_name = "postlist.html"
        context_object_name="posts"
        paginate_by = 5
        allow_empty = True

Confident enough, I thought that any query(including using the current route slug) I feed into the queryset property should work, such as this for example:

url(r'^tag/(?P<tagslug>[-\w]+)/$',ListPosts.as_view(
queryset = Post.objects.filter(tags__name__in=['tagslug']).order_by('created')),
name = 'showtag'),

Unfortunately the framework couldn't really understand what 'tagslug' actually would refer to.

So is there any way I can get the value of the slug in the url and use in the query right in the queryset property without having to do that in my view? I could have just done it in my view but if you check my urls above they're pretty different in structure, one does not have a slug, another has only one and another has two, I don't feel that that having conditionals in the view would not be much neat.

Thanks for your time.