prefer not to pollute AR::Base

lib/kaminari/active_record_extension.rb

@@ -2,7 +2,6 @@ require File.join(File.dirname(__FILE__), 'active_record_relation_methods')
 module Kaminari
   module ActiveRecordExtension
     extend ActiveSupport::Concern
-    include Kaminari::ConfigurationMethods
     included do
       def self.inherited(kls) #:nodoc:
         # TERRIBLE HORRIBLE NO GOOD VERY BAD HACK: inheritable_attributes is not yet set here on AR 3.0
@@ -14,6 +13,8 @@ module Kaminari
         end
 
         kls.class_eval do
+          include Kaminari::ConfigurationMethods
+
           # Fetch the values at the specified page number
           #   Model.page(5)
           scope :page, Proc.new {|num|

spec/models/default_per_page_spec.rb

@@ -1,6 +1,11 @@
 require File.expand_path('../spec_helper', File.dirname(__FILE__))
 
 describe 'default per_page' do
+  describe 'AR::Base' do
+    subject { ActiveRecord::Base }
+    it { should_not respond_to :paginates_per }
+  end
+
   subject { User.page 0 }
 
   context 'by default' do