I needed a couple of session variables to allow a reader of a blog to
be redirected to the correct URL if the blog name he's visiting
(app/:blogname) gets updated;
Question: is it convenient to pass 'base' to the model or would it be
more efficient to do everything in the controller?
ex. in blog.rb
if !base.session[:last_visited_blog_id].nil? && base.params[:blog]