merging 1.6 additions into 2.0 branch

lib/cancan/controller_additions.rb

@@ -188,7 +188,7 @@ module CanCan
         skip_authorize_resource(*args)
       end
 
-      # Skip both the loading behavior of CanCan. This is useful when using +load_and_authorize_resource+ but want to
+      # Skip the loading behavior of CanCan. This is useful when using +load_and_authorize_resource+ but want to
       # only do authorization on certain actions. You can pass :only and :except options to specify which actions to
       # skip the effects on. It will apply to all actions by default.
       #
@@ -205,7 +205,7 @@ module CanCan
         cancan_skipper[:load][name] = options
       end
 
-      # Skip both the authorization behavior of CanCan. This is useful when using +load_and_authorize_resource+ but want to
+      # Skip the authorization behavior of CanCan. This is useful when using +load_and_authorize_resource+ but want to
       # only do loading on certain actions. You can pass :only and :except options to specify which actions to
       # skip the effects on. It will apply to all actions by default.
       #

lib/cancan/controller_resource.rb

@@ -107,10 +107,22 @@ module CanCan
       if @options[:singleton] && parent_resource.respond_to?(name)
         parent_resource.send(name)
       else
-        @options[:find_by] ? resource_base.send("find_by_#{@options[:find_by]}!", id_param) : resource_base.find(id_param)
+        if @options[:find_by]
+          if resource_base.respond_to? "find_by_#{@options[:find_by]}!"
+            resource_base.send("find_by_#{@options[:find_by]}!", id_param)
+          else
+            resource_base.send(@options[:find_by], id_param)
+          end
+        else
+          adapter.find(resource_base, id_param)
+        end
       end
     end
 
+    def adapter
+      ModelAdapters::AbstractAdapter.adapter_class(resource_class)
+    end
+
     def authorization_action
       parent? ? :show : @params[:action].to_sym
     end

lib/cancan/exceptions.rb

@@ -43,7 +43,7 @@ module CanCan
       @message = message
       @action = action
       @subject = subject
-      @default_message = "You are not authorized to access this page."
+      @default_message = I18n.t(:"unauthorized.default", :default => "You are not authorized to access this page.")
     end
 
     def to_s

lib/cancan/matchers.rb

@@ -1,5 +1,5 @@
-RSpec = Spec unless defined? RSpec # for RSpec 1 compatability
-RSpec::Matchers.define :be_able_to do |*args|
+rspec_module = defined?(RSpec::Core) ? 'RSpec' : 'Spec'  # for RSpec 1 compatability
+Kernel.const_get(rspec_module)::Matchers.define :be_able_to do |*args|
   match do |ability|
     ability.can?(*args)
   end

lib/cancan/model_adapters/abstract_adapter.rb

@@ -15,6 +15,11 @@ module CanCan
         false # override in subclass
       end
 
+      # Override if you need custom find behavior
+      def self.find(model_class, id)
+        model_class.find(id)
+      end
+
       # Used to determine if this model adapter will override the matching behavior for a hash of conditions.
       # If this returns true then matches_conditions_hash? will be called. See Rule#matches_conditions_hash
       def self.override_conditions_hash_matching?(subject, conditions)

lib/cancan/model_adapters/data_mapper_adapter.rb

@@ -5,6 +5,10 @@ module CanCan
         model_class <= DataMapper::Resource
       end
 
+      def self.find(model_class, id)
+        model_class.get(id)
+      end
+
       def self.override_conditions_hash_matching?(subject, conditions)
         conditions.any? { |k,v| !k.kind_of?(Symbol) }
       end
@@ -27,6 +31,4 @@ module CanCan
   end # module ModelAdapters
 end # module CanCan
 
-DataMapper::Model.class_eval do
-  include CanCan::ModelAdditions::ClassMethods
-end
+DataMapper::Model.append_extensions(CanCan::ModelAdditions::ClassMethods)