Add code for fixing issue #664 (regression in 1.6.8).

lib/cancan/controller_resource.rb

@@ -213,10 +213,15 @@ module CanCan
 
     def resource_params
       if @options[:class]
-        @params[@options[:class].to_s.underscore.gsub('/', '_')]
+        params_key = extract_key(@options[:class])
-      else
+        return @params[params_key] if @params[params_key]
-        @params[namespaced_name.to_s.underscore.gsub("/", "_")]
       end
+
+      resource_params_by_namespaced_name
+    end
+
+    def resource_params_by_namespaced_name
+      @params[extract_key(namespaced_name)]
     end
 
     def namespace
@@ -244,5 +249,11 @@ module CanCan
     def new_actions
       [:new, :create] + [@options[:new]].flatten
     end
+
+    private
+
+    def extract_key(value)
+       value.to_s.underscore.gsub('/', '_')
+    end
   end
 end

spec/cancan/controller_resource_spec.rb

@@ -75,13 +75,19 @@ describe CanCan::ControllerResource do
   end
 
   it "should build a new resource for namespaced model with hash if params[:id] is not specified" do
-    project = Sub::Project.create!
     @params.merge!(:action => "create", 'sub_project' => {:name => "foobar"})
     resource = CanCan::ControllerResource.new(@controller, :class => ::Sub::Project)
     resource.load_resource
     @controller.instance_variable_get(:@project).name.should == "foobar"
   end
 
+  it "should build a new resource for namespaced controller and namespaced model with hash if params[:id] is not specified" do
+    @params.merge!(:controller => "Admin::SubProjectsController", :action => "create", 'sub_project' => {:name => "foobar"})
+    resource = CanCan::ControllerResource.new(@controller, :class => Project)
+    resource.load_resource
+    @controller.instance_variable_get(:@sub_project).name.should == "foobar"
+  end
+
   it "should build a new resource with attributes from current ability" do
     @params.merge!(:action => "new")
     @ability.can(:create, Project, :name => "from conditions")