Django permalink not working for blog app - django

Question

I am trying to get my blog posts to return a permalink so that I can ping them to blog directores, however when I call the permalink function I have created there is always an error. Everything I have found from googleing/stackoverflowing gets one error or another!
The most common error I am getting back is:
Reverse for 'viewpost' with arguments '()' and keyword arguments '{'slug': u'site-redesign'}' not found.
My model for this error:
class BlogPost(models.Model):
author = models.ForeignKey(User, related_name='posts')
title = models.CharField(max_length=200)
slug = models.SlugField(max_length=200)
...
#models.permalink
def get_absolute_url(self):
return ('viewpost', (), { 'slug':self.slug})
My urls.py:
urlpatterns = patterns('blog.views',
...
(r'^post/(?P<page_slug>[a-zA-Z0-9-]+)/$', 'viewpost'),
...
)
If i print: reverse('blogPost', kwargs={'slug': self.slug }) I get the correct url.
What am I doing wrong.
I am calling the function via:
signals.post_save.connect(
ping_directories(content_attr = 'body', url_attr = 'get_absolute_url'), sender = BlogPost, weak = False)
If you need any more info please let me know.
--EDIT more views
#pages
(r'^post/(?P<page_slug>[a-zA-Z0-9-]+)/$', 'viewpost'),
(r'^category/(?P<category_slug>[a-zA-Z0-9-]+)/page/(?P<page_number>[0-9]+)/$', 'viewcategories'),
(r'^category/$', 'listcategories'),
(r'^tag/(?P<tag_slug>[a-zA-Z0-9-]+)/page/(?P<page_number>[0-9]+)/$', 'viewtag'),
(r'^tag/$', 'listtags'),
(r'^category/(?P<category_slug>[a-zA-Z0-9-]+)/$', 'viewcategories'),
(r'^tag/(?P<tag_slug>[a-zA-Z0-9-]+)/$', 'viewtag'),
(r'^comments/', include('django.contrib.comments.urls')),
(r'^page/(?P<page_number>[0-9]+)/$', 'index'),
(r'^$', 'index'),
)
and the views:
def viewpost(request, page_slug):
blog_post = get_object_or_404(BlogPost, post_status = 'published', slug=page_slug)
path = settings.BLOG_PATH
return render_to_response("blog/detail.html", { "post": blog_post, "path":path}, context_instance=RequestContext(request))

Answer 1

You've called the kwargs page_slug in the url and slug in your permlink

Answer 2

Turns out that the method calling my get_absolute_url also needed an extra callback so I was getting misled. Apologies for the confusion! Offending code:
signals.post_save.connect(ping_directories(content_attr = 'body', url_attr = 'get_absolute_url', feed_url_fun=lambda x: 'http://example.com/feed/address/here/'), sender = BlogPost, weak = False)