adding :through option to replace :nesting option and moving ResourceAuthorization class code into ControllerResource

CHANGELOG.rdoc

@@ -1,3 +1,9 @@
+* Changing :resource option in load/authorize_resource back to :class with ability to pass false
+
+* Removing :nested option in favor of :through option with separate load/authorize call
+
+* Moving internal logic from ResourceAuthorization to ControllerResource class
+
 * Supporting multiple "can" and "cannot" calls with accessible_by (thanks funny-falcon) - see issue #71
 
 * Supporting deeply nested aliases - see issue #98

lib/cancan.rb

@@ -1,7 +1,6 @@
 require 'cancan/ability'
 require 'cancan/can_definition'
 require 'cancan/controller_resource'
-require 'cancan/resource_authorization'
 require 'cancan/controller_additions'
 require 'cancan/active_record_additions'
 require 'cancan/exceptions'

lib/cancan/controller_additions.rb

@@ -11,11 +11,11 @@ module CanCan
       #     load_and_authorize_resource
       #   end
       #
-      def load_and_authorize_resource(options = {})
+      def load_and_authorize_resource(*args)
-        ResourceAuthorization.add_before_filter(self, :load_and_authorize_resource, options)
+        ControllerResource.add_before_filter(self, :load_and_authorize_resource, *args)
       end
 
-      # Sets up a before filter which loads the appropriate model resource into an instance variable.
+      # Sets up a before filter which loads the model resource into an instance variable.
       # For example, given an ArticlesController it will load the current article into the @article
       # instance variable. It does this by either calling Article.find(params[:id]) or
       # Article.new(params[:article]) depending upon the action. It does nothing for the "index"
@@ -41,6 +41,20 @@ module CanCan
       #     end
       #   end
       #
+      # If a name is provided which does not match the controller it assumes it is a parent resource. Child
+      # resources can then be loaded through it.
+      #
+      #   class BooksController < ApplicationController
+      #     load_resource :author
+      #     load_resource :book, :through => :author
+      #   end
+      #
+      # Here the author resource will be loaded before each action using params[:author_id]. The book resource
+      # will then be loaded through the @author instance variable.
+      #
+      # That first argument is optional and will default to the singular name of the controller.
+      # A hash of options (see below) can also be passed to this method to further customize it.
+      #
       # See load_and_authorize_resource to automatically authorize the resource too.
       #
       # Options:
@@ -50,27 +64,22 @@ module CanCan
       # [:+except+]
       #   Does not apply before filter to given actions.
       #
-      # [:+nested+]
+      # [:+through+]
-      #   Specify which resource this is nested under.
+      #   Load this resource through another one. This should match the name of the parent instance variable.
       #
-      #     load_resource :nested => :author
+      # [:+parent+]
+      #   True or false depending on if the resource is considered a parent resource. This defaults to +true+ if a resource
+      #   name is given which does not match the controller.
       #
-      #   Deep nesting can be defined in an array.
+      # [:+class+]
-      #
-      #     load_resource :nested => [:publisher, :author]
-      #
-      # [:+name+]
-      #   The name of the resource if it cannot be determined from controller (string or symbol).
-      #
-      #     load_resource :name => :article
-      #
-      # [:+resource+]
       #   The class to use for the model (string or constant).
       #
+      # [:+instance_name+]
+      #   The name of the instance variable to load the resource into.
+      #
       # [:+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 usually not necessary because it will try to guess depending on if the id param is present.
-      #   is present in +params+.
       #
       #     load_resource :collection => [:sort, :list]
       #
@@ -81,11 +90,11 @@ module CanCan
       #
       #     load_resource :new => :build
       #
-      def load_resource(options = {})
+      def load_resource(*args)
-        ResourceAuthorization.add_before_filter(self, :load_resource, options)
+        ControllerResource.add_before_filter(self, :load_resource, *args)
       end
 
-      # Sets up a before filter which authorizes the current resource using the instance variable.
+      # Sets up a before filter which authorizes the resource using the instance variable.
       # For example, if you have an ArticlesController it will check the @article instance variable
       # and ensure the user can perform the current action on it. Under the hood it is doing
       # something like the following.
@@ -98,6 +107,19 @@ module CanCan
       #     authorize_resource
       #   end
       #
+      # If you pass in the name of a resource which does not match the controller it will assume
+      # it is a parent resource.
+      #
+      #   class BooksController < ApplicationController
+      #     authorize_resource :author
+      #     authorize_resource :book
+      #   end
+      #
+      # Here it will authorize :+show+, @+author+ on every action before authorizing the book.
+      #
+      # That first argument is optional and will default to the singular name of the controller.
+      # A hash of options (see below) can also be passed to this method to further customize it.
+      #
       # See load_and_authorize_resource to automatically load the resource too.
       #
       # Options:
@@ -107,17 +129,23 @@ module CanCan
       # [:+except+]
       #   Does not apply before filter to given actions.
       #
-      # [:+name+]
+      # [:+parent+]
-      #   The name of the resource if it cannot be determined from controller (string or symbol).
+      #   True or false depending on if the resource is considered a parent resource. This defaults to +true+ if a resource
+      #   name is given which does not match the controller.
       #
-      #     load_resource :name => :article
+      # [:+class+]
+      #   The class to use for the model (string or constant). This passed in when the instance variable is not set.
+      #   Pass +false+ if there is no associated class for this resource and it will use a symbol of the resource name.
+      #
+      # [:+instance_name+]
+      #   The name of the instance variable for this resource.
       #
       # [:+resource+]
       #   The class to use for the model (string or constant). Alternatively pass a symbol
       #   to represent a resource which does not have a class.
       #
-      def authorize_resource(options = {})
+      def authorize_resource(*args)
-        ResourceAuthorization.add_before_filter(self, :authorize_resource, options)
+        ControllerResource.add_before_filter(self, :authorize_resource, *args)
       end
     end
 

lib/cancan/controller_resource.rb

@@ -1,54 +1,105 @@
 module CanCan
-  # Used internally to load and authorize a given controller resource.
+  # Handle the load and authorization controller logic so we don't clutter up all controllers with non-interface methods.
-  # This manages finding or building an instance of the resource. If a
+  # This class is used internally, so you do not need to call methods directly on it.
-  # parent is given it will go through the association.
   class ControllerResource # :nodoc:
-    def initialize(controller, name, parent = nil, options = {})
+    def self.add_before_filter(controller_class, method, options = {})
-      raise ImplementationRemoved, "The :class option has been renamed to :resource for specifying the class in CanCan." if options.has_key? :class
+      controller_class.before_filter(options.slice(:only, :except)) do |controller|
-      @controller = controller
+        ControllerResource.new(controller, controller.params, options.except(:only, :except)).send(method)
-      @name = name
-      @parent = parent
-      @options = options
-    end
-
-    # Returns the class used for this resource. This can be overriden by the :resource option.
-    # Sometimes one will use a symbol as the resource if a class does not exist for it. In that
-    # case "find" and "build" should not be called on it.
-    def model_class
-      resource_class = @options[:resource]
-      if resource_class.nil?
-        @name.to_s.camelize.constantize
-      elsif resource_class.kind_of? String
-        resource_class.constantize
-      else
-        resource_class # could be a symbol
       end
     end
 
-    def find(id)
+    def initialize(controller, params, *args)
-      self.model_instance ||= base.find(id)
+      @controller = controller
+      @params = params
+      @options = args.extract_options!
+      @name = args.first
+      raise CanCan::ImplementationRemoved, "The :nested option is no longer supported, instead use :through with separate load/authorize call." if @options[:nested]
+      raise CanCan::ImplementationRemoved, "The :name option is no longer supported, instead pass the name as the first argument." if @options[:name]
+      raise CanCan::ImplementationRemoved, "The :resource option has been renamed back to :class, use false if no class." if @options[:resource]
     end
 
-    # Build a new instance of this resource. If it is a class we just call "new" otherwise
+    def load_and_authorize_resource
-    # it's an associaiton and "build" is used.
+      load_resource
-    def build(attributes)
+      authorize_resource
-      self.model_instance ||= (base.kind_of?(Class) ? base.new(attributes) : base.build(attributes))
     end
 
-    def model_instance
+    def load_resource
-      @controller.instance_variable_get("@#{@name}")
+      if !resource_instance && (parent? || member_action?)
+        @controller.instance_variable_set("@#{name}", load_resource_instance)
+      end
     end
 
-    def model_instance=(instance)
+    def authorize_resource
-      @controller.instance_variable_set("@#{@name}", instance)
+      @controller.authorize!(@params[:action].to_sym, resource_instance || resource_class)
+    end
+
+    def parent?
+      @options[:parent] || @name && @name != name_from_controller.to_sym
     end
 
     private
 
+    def load_resource_instance
+      if !parent? && new_actions.include?(@params[:action].to_sym)
+        resource_base.kind_of?(Class) ? resource_base.new(attributes) : resource_base.build(attributes)
+      elsif id_param
+        resource_base.find(id_param)
+      end
+    end
+
+    def attributes
+      @params[name.to_sym]
+    end
+
+    def id_param
+      @params[parent? ? :"#{name}_id" : :id]
+    end
+
+    def member_action?
+      !collection_actions.include? @params[:action].to_sym
+    end
+
+    # Returns the class used for this resource. This can be overriden by the :class option.
+    # If +false+ is passed in it will use the resource name as a symbol in which case it should
+    # only be used for authorization, not loading since there's no class to load through.
+    def resource_class
+      case @options[:class]
+      when false  then name.to_sym
+      when nil    then name.to_s.camelize.constantize
+      when String then @options[:class].constantize
+      else @options[:class]
+      end
+    end
+
+    def resource_instance
+      @controller.instance_variable_get("@#{name}")
+    end
+
     # The object that methods (such as "find", "new" or "build") are called on.
-    # If there is a parent it will be the association, otherwise it will be the model's class.
+    # If the :through option is passed it will go through an association on that instance.
-    def base
+    def resource_base
-      @parent ? @parent.model_instance.send(@name.to_s.pluralize) : model_class
+      through_resource ? through_resource.send(name.to_s.pluralize) : resource_class
+    end
+
+    # The object to load this resource through.
+    def through_resource
+      @options[:through] && @controller.instance_variable_get("@#{@options[:through]}")
+    end
+
+    def name
+      @name || name_from_controller
+    end
+
+    def name_from_controller
+      @params[:controller].sub("Controller", "").underscore.split('/').last.singularize
+    end
+
+    def collection_actions
+      [:index] + [@options[:collection]].flatten
+    end
+
+    def new_actions
+      [:new, :create] + [@options[:new]].flatten
     end
   end
 end

lib/cancan/resource_authorization.rb

@@ -1,70 +0,0 @@
-module CanCan
-  # Handle the load and authorization controller logic so we don't clutter up all controllers with non-interface methods.
-  # This class is used internally, so you do not need to call methods directly on it.
-  class ResourceAuthorization # :nodoc:
-    def self.add_before_filter(controller_class, method, options = {})
-      controller_class.before_filter(options.slice(:only, :except)) do |controller|
-        ResourceAuthorization.new(controller, controller.params, options.except(:only, :except)).send(method)
-      end
-    end
-
-    def initialize(controller, params, options = {})
-      @controller = controller
-      @params = params
-      @options = options
-    end
-
-    def load_and_authorize_resource
-      load_resource
-      authorize_resource
-    end
-
-    def load_resource
-      if collection_actions.include? @params[:action].to_sym
-        parent_resource
-      else
-        if new_actions.include? @params[:action].to_sym
-          resource.build(@params[model_name.to_sym])
-        elsif @params[:id]
-          resource.find(@params[:id])
-        end
-      end
-    end
-
-    def authorize_resource
-      @controller.authorize!(@params[:action].to_sym, resource.model_instance || resource.model_class)
-    end
-
-    private
-
-    def resource
-      @resource ||= ControllerResource.new(@controller, model_name, parent_resource, @options)
-    end
-
-    def parent_resource
-      parent = nil
-      [@options[:nested]].flatten.compact.each do |name|
-        id = @params["#{name}_id".to_sym]
-        if id
-          parent = ControllerResource.new(@controller, name, parent)
-          parent.find(id)
-        else
-          parent = nil
-        end
-      end
-      parent
-    end
-
-    def model_name
-      @options[:name] || @params[:controller].sub("Controller", "").underscore.split('/').last.singularize
-    end
-
-    def collection_actions
-      [:index] + [@options[:collection]].flatten
-    end
-
-    def new_actions
-      [:new, :create] + [@options[:new]].flatten
-    end
-  end
-end

spec/cancan/controller_additions_spec.rb

@@ -52,20 +52,20 @@ describe CanCan::ControllerAdditions do
     @controller.cannot?(:foo, :bar).should be_true
   end
 
-  it "load_and_authorize_resource should setup a before filter which passes call to ResourceAuthorization" do
+  it "load_and_authorize_resource should setup a before filter which passes call to ControllerResource" do
-    stub(CanCan::ResourceAuthorization).new(@controller, @controller.params, :foo => :bar).mock!.load_and_authorize_resource
+    stub(CanCan::ControllerResource).new(@controller, @controller.params, :foo => :bar).mock!.load_and_authorize_resource
     mock(@controller_class).before_filter({}) { |options, block| block.call(@controller) }
     @controller_class.load_and_authorize_resource :foo => :bar
   end
 
-  it "authorize_resource should setup a before filter which passes call to ResourceAuthorization" do
+  it "authorize_resource should setup a before filter which passes call to ControllerResource" do
-    stub(CanCan::ResourceAuthorization).new(@controller, @controller.params, :foo => :bar).mock!.authorize_resource
+    stub(CanCan::ControllerResource).new(@controller, @controller.params, :foo => :bar).mock!.authorize_resource
     mock(@controller_class).before_filter(:except => :show) { |options, block| block.call(@controller) }
     @controller_class.authorize_resource :foo => :bar, :except => :show
   end
 
-  it "load_resource should setup a before filter which passes call to ResourceAuthorization" do
+  it "load_resource should setup a before filter which passes call to ControllerResource" do
-    stub(CanCan::ResourceAuthorization).new(@controller, @controller.params, :foo => :bar).mock!.load_resource
+    stub(CanCan::ControllerResource).new(@controller, @controller.params, :foo => :bar).mock!.load_resource
     mock(@controller_class).before_filter(:only => [:show, :index]) { |options, block| block.call(@controller) }
     @controller_class.load_resource :foo => :bar, :only => [:show, :index]
   end

spec/cancan/controller_resource_spec.rb

@@ -2,58 +2,170 @@ require "spec_helper"
 
 describe CanCan::ControllerResource do
   before(:each) do
-    @controller = Object.new
+    @controller = Object.new # simple stub for now
   end
 
-  it "should determine model class by constantizing give name" do
+  it "should load the resource into an instance variable if params[:id] is specified" do
-    CanCan::ControllerResource.new(@controller, :ability).model_class.should == Ability
+    stub(Ability).find(123) { :some_resource }
-  end
+    resource = CanCan::ControllerResource.new(@controller, :controller => "abilities", :action => "show", :id => 123)
-
+    resource.load_resource
-  it "should fetch model through model class and assign it to the instance" do
-    stub(Ability).find(123) { :some_ability }
-    CanCan::ControllerResource.new(@controller, :ability).find(123)
-    @controller.instance_variable_get(:@ability).should == :some_ability
-  end
-
-  it "should fetch model through parent and assign it to the instance" do
-    parent = Object.new
-    stub(parent).model_instance.stub!.abilities.stub!.find(123) { :some_ability }
-    CanCan::ControllerResource.new(@controller, :ability, parent).find(123)
-    @controller.instance_variable_get(:@ability).should == :some_ability
-  end
-
-  it "should build model through model class and assign it to the instance" do
-    stub(Ability).new(123) { :some_ability }
-    CanCan::ControllerResource.new(@controller, :ability).build(123)
-    @controller.instance_variable_get(:@ability).should == :some_ability
-  end
-
-  it "should build model through parent and assign it to the instance" do
-    parent = Object.new
-    stub(parent).model_instance.stub!.abilities.stub!.build(123) { :some_ability }
-    CanCan::ControllerResource.new(@controller, :ability, parent).build(123)
-    @controller.instance_variable_get(:@ability).should == :some_ability
-  end
-
-  it "should not load resource if instance variable is already provided" do
-    @controller.instance_variable_set(:@ability, :some_ability)
-    CanCan::ControllerResource.new(@controller, :ability).find(123)
-    @controller.instance_variable_get(:@ability).should == :some_ability
-  end
-
-  it "should use the model class option if provided" do
-    stub(Person).find(123) { :some_resource }
-    CanCan::ControllerResource.new(@controller, :ability, nil, :resource => Person).find(123)
     @controller.instance_variable_get(:@ability).should == :some_resource
   end
 
-  it "should convert string to constant for resource" do
+  it "should not load resource into an instance variable if already set" do
-    CanCan::ControllerResource.new(@controller, :ability, nil, :resource => "Person").model_class.should == Person
+    @controller.instance_variable_set(:@ability, :some_ability)
+    resource = CanCan::ControllerResource.new(@controller, :controller => "abilities", :action => "show", :id => 123)
+    resource.load_resource
+    @controller.instance_variable_get(:@ability).should == :some_ability
   end
 
-  it "should raise an exception when specifying :class option since it is no longer used" do
+  it "should properly load resource for namespaced controller" do
+    stub(Ability).find(123) { :some_resource }
+    resource = CanCan::ControllerResource.new(@controller, :controller => "admin/abilities", :action => "show", :id => 123)
+    resource.load_resource
+    @controller.instance_variable_get(:@ability).should == :some_resource
+  end
+
+  it "should properly load resource for namespaced controller when using '::' for namespace" do
+    stub(Ability).find(123) { :some_resource }
+    resource = CanCan::ControllerResource.new(@controller, :controller => "Admin::AbilitiesController", :action => "show", :id => 123)
+    resource.load_resource
+    @controller.instance_variable_get(:@ability).should == :some_resource
+  end
+
+  it "should build a new resource with hash if params[:id] is not specified" do
+    stub(Ability).new(:foo => "bar") { :some_resource }
+    resource = CanCan::ControllerResource.new(@controller, :controller => "abilities", :action => "create", :ability => {:foo => "bar"})
+    resource.load_resource
+    @controller.instance_variable_get(:@ability).should == :some_resource
+  end
+
+  it "should build a new resource even if attribute hash isn't specified" do
+    stub(Ability).new(nil) { :some_resource }
+    resource = CanCan::ControllerResource.new(@controller, :controller => "abilities", :action => "new")
+    resource.load_resource
+    @controller.instance_variable_get(:@ability).should == :some_resource
+  end
+
+  it "should not build a resource when on index action" do
+    resource = CanCan::ControllerResource.new(@controller, :controller => "abilities", :action => "index")
+    resource.load_resource
+    @controller.instance_variable_get(:@ability).should be_nil
+  end
+
+  it "should perform authorization using controller action and loaded model" do
+    @controller.instance_variable_set(:@ability, :some_resource)
+    stub(@controller).authorize!(:show, :some_resource) { raise CanCan::AccessDenied }
+    resource = CanCan::ControllerResource.new(@controller, :controller => "abilities", :action => "show")
+    lambda { resource.authorize_resource }.should raise_error(CanCan::AccessDenied)
+  end
+
+  it "should perform authorization using controller action and non loaded model" do
+    stub(@controller).authorize!(:show, Ability) { raise CanCan::AccessDenied }
+    resource = CanCan::ControllerResource.new(@controller, :controller => "abilities", :action => "show")
+    lambda { resource.authorize_resource }.should raise_error(CanCan::AccessDenied)
+  end
+
+  it "should call load_resource and authorize_resource for load_and_authorize_resource" do
+    resource = CanCan::ControllerResource.new(@controller, :controller => "abilities", :action => "show")
+    mock(resource).load_resource
+    mock(resource).authorize_resource
+    resource.load_and_authorize_resource
+  end
+
+  it "should not build a resource when on custom collection action" do
+    resource = CanCan::ControllerResource.new(@controller, {:controller => "abilities", :action => "sort"}, {:collection => [:sort, :list]})
+    resource.load_resource
+    @controller.instance_variable_get(:@ability).should be_nil
+  end
+
+  it "should build a resource when on custom new action even when params[:id] exists" do
+    stub(Ability).new(nil) { :some_resource }
+    resource = CanCan::ControllerResource.new(@controller, {:controller => "abilities", :action => "build", :id => 123}, {:new => :build})
+    resource.load_resource
+    @controller.instance_variable_get(:@ability).should == :some_resource
+  end
+
+  it "should not try to load resource for other action if params[:id] is undefined" do
+    resource = CanCan::ControllerResource.new(@controller, :controller => "abilities", :action => "list")
+    resource.load_resource
+    @controller.instance_variable_get(:@ability).should be_nil
+  end
+
+  it "should be a parent resource when name is provided which doesn't match controller" do
+    resource = CanCan::ControllerResource.new(@controller, {:controller => "abilities"}, :person)
+    resource.should be_parent
+  end
+
+  it "should not be a parent resource when name is provided which matches controller" do
+    resource = CanCan::ControllerResource.new(@controller, {:controller => "abilities"}, :ability)
+    resource.should_not be_parent
+  end
+
+  it "should be parent if specified in options" do
+    resource = CanCan::ControllerResource.new(@controller, {:controller => "abilities"}, :ability, {:parent => true})
+    resource.should be_parent
+  end
+
+  it "should load parent resource through proper id parameter when supplying a resource with a different name" do
+    stub(Person).find(123) { :some_person }
+    resource = CanCan::ControllerResource.new(@controller, {:controller => "abilities", :action => "index", :person_id => 123}, :person)
+    resource.load_resource
+    @controller.instance_variable_get(:@person).should == :some_person
+  end
+
+  it "should load parent resource for collection action" do
+    stub(Person).find(456) { :some_person }
+    resource = CanCan::ControllerResource.new(@controller, {:controller => "abilities", :action => "index", :person_id => 456}, :person)
+    resource.load_resource
+    @controller.instance_variable_get(:@person).should == :some_person
+  end
+
+  it "should load resource through the association of another parent resource" do
+    person = Object.new
+    @controller.instance_variable_set(:@person, person)
+    stub(person).abilities.stub!.find(123) { :some_ability }
+    resource = CanCan::ControllerResource.new(@controller, {:controller => "abilities", :action => "show", :id => 123}, {:through => :person})
+    resource.load_resource
+    @controller.instance_variable_get(:@ability).should == :some_ability
+  end
+
+  it "should not load through parent resource if instance isn't loaded" do
+    stub(Ability).find(123) { :some_ability }
+    resource = CanCan::ControllerResource.new(@controller, {:controller => "abilities", :action => "show", :id => 123}, {:through => :person})
+    resource.load_resource
+    @controller.instance_variable_get(:@ability).should == :some_ability
+  end
+
+  it "should load the model using a custom class" do
+    stub(Person).find(123) { :some_resource }
+    resource = CanCan::ControllerResource.new(@controller, {:controller => "abilities", :action => "show", :id => 123}, {:class => Person})
+    resource.load_resource
+    @controller.instance_variable_get(:@ability).should == :some_resource
+  end
+
+  it "should authorize based on resource name if class is false" do
+    stub(@controller).authorize!(:show, :ability) { raise CanCan::AccessDenied }
+    resource = CanCan::ControllerResource.new(@controller, {:controller => "abilities", :action => "show", :id => 123}, {:class => false})
+    lambda { resource.authorize_resource }.should raise_error(CanCan::AccessDenied)
+
+  end
+
+  it "should raise ImplementationRemoved when adding :name option" do
     lambda {
-      CanCan::ControllerResource.new(@controller, :ability, nil, :class => Person)
+      CanCan::ControllerResource.new(@controller, {}, {:name => :foo})
+    }.should raise_error(CanCan::ImplementationRemoved)
+  end
+
+  it "should raise ImplementationRemoved exception when specifying :resource option since it is no longer used" do
+    lambda {
+      CanCan::ControllerResource.new(@controller, {}, {:resource => Person})
+    }.should raise_error(CanCan::ImplementationRemoved)
+  end
+
+  it "should raise ImplementationRemoved exception when passing :nested option" do
+    lambda {
+      CanCan::ControllerResource.new(@controller, {}, {:nested => :person})
     }.should raise_error(CanCan::ImplementationRemoved)
   end
 end

spec/cancan/resource_authorization_spec.rb

@@ -1,135 +0,0 @@
-require "spec_helper"
-
-describe CanCan::ResourceAuthorization do
-  before(:each) do
-    @controller = Object.new # simple stub for now
-  end
-
-  it "should load the resource into an instance variable if params[:id] is specified" do
-    stub(Ability).find(123) { :some_resource }
-    authorization = CanCan::ResourceAuthorization.new(@controller, :controller => "abilities", :action => "show", :id => 123)
-    authorization.load_resource
-    @controller.instance_variable_get(:@ability).should == :some_resource
-  end
-
-  it "should properly load resource for namespaced controller" do
-    stub(Ability).find(123) { :some_resource }
-    authorization = CanCan::ResourceAuthorization.new(@controller, :controller => "admin/abilities", :action => "show", :id => 123)
-    authorization.load_resource
-    @controller.instance_variable_get(:@ability).should == :some_resource
-  end
-
-  it "should properly load resource for namespaced controller when using '::' for namespace" do
-    stub(Ability).find(123) { :some_resource }
-    authorization = CanCan::ResourceAuthorization.new(@controller, :controller => "Admin::AbilitiesController", :action => "show", :id => 123)
-    authorization.load_resource
-    @controller.instance_variable_get(:@ability).should == :some_resource
-  end
-
-  it "should build a new resource with hash if params[:id] is not specified" do
-    stub(Ability).new(:foo => "bar") { :some_resource }
-    authorization = CanCan::ResourceAuthorization.new(@controller, :controller => "abilities", :action => "create", :ability => {:foo => "bar"})
-    authorization.load_resource
-    @controller.instance_variable_get(:@ability).should == :some_resource
-  end
-
-  it "should build a new resource even if attribute hash isn't specified" do
-    stub(Ability).new(nil) { :some_resource }
-    authorization = CanCan::ResourceAuthorization.new(@controller, :controller => "abilities", :action => "new")
-    authorization.load_resource
-    @controller.instance_variable_get(:@ability).should == :some_resource
-  end
-
-  it "should not build a resource when on index action" do
-    authorization = CanCan::ResourceAuthorization.new(@controller, :controller => "abilities", :action => "index")
-    authorization.load_resource
-    @controller.instance_variable_get(:@ability).should be_nil
-  end
-
-  it "should perform authorization using controller action and loaded model" do
-    @controller.instance_variable_set(:@ability, :some_resource)
-    stub(@controller).authorize!(:show, :some_resource) { raise CanCan::AccessDenied }
-    authorization = CanCan::ResourceAuthorization.new(@controller, :controller => "abilities", :action => "show")
-    lambda { authorization.authorize_resource }.should raise_error(CanCan::AccessDenied)
-  end
-
-  it "should perform authorization using controller action and non loaded model" do
-    stub(@controller).authorize!(:show, Ability) { raise CanCan::AccessDenied }
-    authorization = CanCan::ResourceAuthorization.new(@controller, :controller => "abilities", :action => "show")
-    lambda { authorization.authorize_resource }.should raise_error(CanCan::AccessDenied)
-  end
-
-  it "should call load_resource and authorize_resource for load_and_authorize_resource" do
-    authorization = CanCan::ResourceAuthorization.new(@controller, :controller => "abilities", :action => "show")
-    mock(authorization).load_resource
-    mock(authorization).authorize_resource
-    authorization.load_and_authorize_resource
-  end
-
-  it "should not build a resource when on custom collection action" do
-    authorization = CanCan::ResourceAuthorization.new(@controller, {:controller => "abilities", :action => "sort"}, {:collection => [:sort, :list]})
-    authorization.load_resource
-    @controller.instance_variable_get(:@ability).should be_nil
-  end
-
-  it "should build a resource when on custom new action even when params[:id] exists" do
-    stub(Ability).new(nil) { :some_resource }
-    authorization = CanCan::ResourceAuthorization.new(@controller, {:controller => "abilities", :action => "build", :id => 123}, {:new => :build})
-    authorization.load_resource
-    @controller.instance_variable_get(:@ability).should == :some_resource
-  end
-
-  it "should not try to load resource for other action if params[:id] is undefined" do
-    authorization = CanCan::ResourceAuthorization.new(@controller, :controller => "abilities", :action => "list")
-    authorization.load_resource
-    @controller.instance_variable_get(:@ability).should be_nil
-  end
-
-  it "should load nested resource and fetch other resource through the association" do
-    person = Object.new
-    stub(Person).find(456) { person }
-    stub(person).abilities.stub!.find(123) { :some_ability }
-    authorization = CanCan::ResourceAuthorization.new(@controller, {:controller => "abilities", :action => "show", :id => 123, :person_id => 456}, {:nested => :person})
-    authorization.load_resource
-    @controller.instance_variable_get(:@person).should == person
-    @controller.instance_variable_get(:@ability).should == :some_ability
-  end
-
-  it "should load nested resource for collection action" do
-    person = Object.new
-    stub(Person).find(456) { person }
-    authorization = CanCan::ResourceAuthorization.new(@controller, {:controller => "abilities", :action => "index", :person_id => 456}, {:nested => :person})
-    authorization.load_resource
-    @controller.instance_variable_get(:@person).should == person
-  end
-
-  it "should load nested resource and build resource through a deep association" do
-    stub(Person).find(456).stub!.behaviors.stub!.find(789).stub!.abilities.stub!.build(nil) { :some_ability }
-    authorization = CanCan::ResourceAuthorization.new(@controller, {:controller => "abilities", :action => "new", :person_id => 456, :behavior_id => 789}, {:nested => [:person, :behavior]})
-    authorization.load_resource
-    @controller.instance_variable_get(:@ability).should == :some_ability
-  end
-
-  it "should not load nested resource and build through this if *_id param isn't specified" do
-    stub(Person).find(456) { :some_person }
-    stub(Ability).new(nil) { :some_ability }
-    authorization = CanCan::ResourceAuthorization.new(@controller, {:controller => "abilities", :action => "new", :person_id => 456}, {:nested => [:person, :behavior]})
-    authorization.load_resource
-    @controller.instance_variable_get(:@person).should == :some_person
-    @controller.instance_variable_get(:@ability).should == :some_ability
-  end
-
-  it "should load the model using a custom class" do
-    stub(Person).find(123) { :some_resource }
-    authorization = CanCan::ResourceAuthorization.new(@controller, {:controller => "abilities", :action => "show", :id => 123}, {:resource => Person})
-    authorization.load_resource
-    @controller.instance_variable_get(:@ability).should == :some_resource
-  end
-
-  it "should use :name option to determine resource name" do
-    stub(Ability).find(123) { :some_resource }
-    authorization = CanCan::ResourceAuthorization.new(@controller, {:controller => "foo", :action => "show", :id => 123}, {:name => :ability})
-    authorization.load_resource
-    @controller.instance_variable_get(:@ability).should == :some_resource
-  end
-end