These methods become class methods on any controller

Methods
P
Instance Public methods
paginate(collection_id, options={})

Creates a before_filter which automatically paginates an Active Record model for all actions in a controller (or certain actions if specified with the :actions option).

options are the same as PaginationHelper#paginate, with the addition of:

:actions

an array of actions for which the pagination is active. Defaults to nil (i.e., every action)

Source: show 

# File rails/actionpack/lib/action_controller/pagination.rb, line 147
def paginate(collection_id, options={})
  Pagination.validate_options!(collection_id, options, false)
  module_eval do
    before_filter :create_paginators_and_retrieve_collections
    OPTIONS[self] ||= Hash.new
    OPTIONS[self][collection_id] = options
  end
end