Q:

How to do pagination with cancan?

I'm looking to do pagination with cancan however it's not obvious how to integrate this with gems such as will_paginate.
Ideally cancan's load_resource will delegate to will_paginate and add extra conditions. For example in cancan I've declared guest users 
can :read, Post, :published => true

and this is handled automatically by load_resource. However I'd then like to have will_paginate page through all these results.
Any ideas.
Regards
Brad

A:

This is simple to do with kaminari https://github.com/amatsuda/kaminari
in my PostsController I just do
  before_filter :load_by_pagination, :only => :index
  def load_by_pagination
    @posts = Post.accessible_by(current_ability).order("published_date desc").page params[:page]
  end 

Note that kaminari works properly with the new rails3 ActiveRelation framework so
it's possible to chain methods together to build up scope. And as CanCan is also
ActiveRelation friendly they both just chain together.

A:

You can also do something like this:
class PostsController 

  def index
    @posts = @posts.page(params[:page])     
  ...

