Adding :collection and :new options to load_resource method so we can specify behavior of additional actions if needed.

lib/cancan/controller_additions.rb

@@ -28,7 +28,23 @@ module CanCan
       #   end
       # 
       # See load_and_authorize_resource to automatically authorize the resource too.
-      def load_resource(*args) # TODO add documentation for options which can be passed.
+      # 
+      # Options:
+      # [:+collection+]
+      #   Specify which actions are resource collection actions in addition to :+index+. This
+      #   is usually not necessary because it will try to guess depending on if an :+id+
+      #   is present in +params+.
+      #   
+      #     load_resource :collection => [:sort, :list]
+      #   
+      # [:+new+]
+      #   Specify which actions are new resource actions in addition to :+new+ and :+create+.
+      #   Pass an action name into here if you would like to build a new resource instead of
+      #   fetch one.
+      #   
+      #     load_resource :new => :build
+      #   
+      def load_resource(*args)
         before_filter { |c| ResourceAuthorization.new(c, c.params, *args).load_resource }
       end
       

lib/cancan/resource_authorization.rb

@@ -2,9 +2,10 @@ module CanCan
   class ResourceAuthorization # :nodoc:
     attr_reader :params
     
-    def initialize(controller, params)
+    def initialize(controller, params, options = {})
       @controller = controller
       @params = params
+      @options = options
     end
     
     def load_and_authorize_resource
@@ -13,7 +14,13 @@ module CanCan
     end
     
     def load_resource
-      self.model_instance = params[:id] ? model_class.find(params[:id]) : model_class.new(params[model_name.to_sym]) unless params[:action] == "index"
+      unless collection_actions.include? params[:action].to_sym
+        if new_actions.include? params[:action].to_sym
+          self.model_instance = model_class.new(params[model_name.to_sym])
+        else
+          self.model_instance = model_class.find(params[:id]) if params[:id]
+        end
+      end
     end
     
     def authorize_resource
@@ -37,5 +44,13 @@ module CanCan
     def model_instance=(instance)
       @controller.instance_variable_set("@#{model_name}", instance)
     end
+    
+    def collection_actions
+      [:index] + [@options[:collection]].flatten
+    end
+    
+    def new_actions
+      [:new, :create] + [@options[:new]].flatten
+    end
   end
 end