Experimental support for CanCan

lib/active_admin.rb

@@ -3,6 +3,7 @@
 require 'will_paginate'
 require 'sass'
 require 'active_admin/arbre'
+require 'active_admin/cancan'
 
 module ActiveAdmin
 

lib/active_admin/cancan.rb

@@ -0,0 +1,22 @@
+# Support for CanCan within Active Admin
+
+module ActiveAdmin
+  module CanCan
+    if defined?(::CanCan)
+
+      class ControllerResource < ::CanCan::InheritedResource
+        def resource_base
+          @controller.send :collection
+        end
+      end
+
+      module ControllerAdditions
+        def cancan_resource_class
+          ::ActiveAdmin::CanCan::ControllerResource
+        end
+      end
+
+      ActiveAdmin::ResourceController.send :include, ControllerAdditions
+    end
+  end
+end

lib/active_admin/resource_controller/collection.rb

@@ -126,7 +126,7 @@ def setup_pagination_for_csv
         end
 
         def paginate(chain)
-          chain.paginate(:page => params[:page], :per_page => @per_page || ActiveAdmin.default_per_page)
+          @paginated_collection = chain.paginate(:page => params[:page], :per_page => @per_page || ActiveAdmin.default_per_page)
         end
       end
 

spec/unit/cancan_spec.rb

@@ -0,0 +1,22 @@
+# Mock out CanCan
+module CanCan
+  class InheritedResource
+    def initialize(controller)
+      @controller = controller
+    end
+  end
+end
+
+require 'spec_helper'
+
+describe ActiveAdmin::CanCan do
+
+  describe ActiveAdmin::CanCan::ControllerResource do
+    it "should return the collection for cancan to use" do
+      controller = mock("MockController")
+      controller.should_receive(:collection)
+      ActiveAdmin::CanCan::ControllerResource.new(controller).resource_base
+    end
+  end
+
+end