Eager load Partial variable_name and counter_name. Tidy up render_partial_collection.

actionpack/lib/action_view/partials.rb

@@ -108,8 +108,7 @@ module ActionView
 
         case partial_path
         when String, Symbol, NilClass
-          variable_name, path = partial_pieces(partial_path)
-          pick_template(path).render_partial(self, variable_name, object_assigns, local_assigns)
+          pick_template(find_partial_path(partial_path)).render_partial(self, object_assigns, local_assigns)
         when ActionView::Helpers::FormBuilder
           builder_partial_path = partial_path.class.to_s.demodulize.underscore.sub(/_builder$/, '')
           render_partial(builder_partial_path, object_assigns, (local_assigns || {}).merge(builder_partial_path.to_sym => partial_path))
@@ -130,43 +129,29 @@ module ActionView
 
         local_assigns = local_assigns ? local_assigns.clone : {}
         spacer = partial_spacer_template ? render(:partial => partial_spacer_template) : ''
-        _partial_pieces = {}
+        _paths = {}
         _templates = {}
 
         index = 0
         collection.map do |object|
           _partial_path ||= partial_path || ActionController::RecordIdentifier.partial_path(object, controller.class.controller_path)
-          variable_name, path = _partial_pieces[_partial_path] ||= partial_pieces(_partial_path)
+          path = _paths[_partial_path] ||= find_partial_path(_partial_path)
           template = _templates[path] ||= pick_template(path)
-
-          local_assigns["#{variable_name}_counter".to_sym] = index
-          local_assigns[:object] = local_assigns[variable_name] = object
-          local_assigns[as] = object if as
-
-          result = template.render_partial(self, variable_name, object, local_assigns)
-
-          local_assigns.delete(as)
-          local_assigns.delete(variable_name)
-          local_assigns.delete(:object)
+          local_assigns[template.counter_name] = index
+          result = template.render_partial(self, object, local_assigns, as)
           index += 1
-
           result
         end.join(spacer)
       end
 
-      def partial_pieces(partial_path)
+      def find_partial_path(partial_path)
         if partial_path.include?('/')
-          variable_name = File.basename(partial_path)
-          path = "#{File.dirname(partial_path)}/_#{variable_name}"
+          "#{File.dirname(partial_path)}/_#{File.basename(partial_path)}"
         elsif respond_to?(:controller)
-          variable_name = partial_path
-          path = "#{controller.class.controller_path}/_#{variable_name}"
+          "#{controller.class.controller_path}/_#{partial_path}"
         else
-          variable_name = partial_path
-          path = "_#{variable_name}"
+          "_#{partial_path}"
         end
-        variable_name = variable_name.sub(/\..*$/, '').to_sym
-        return variable_name, path
       end
   end
 end

actionpack/lib/action_view/renderable.rb

@@ -7,16 +7,21 @@ module ActionView
       @@mutex = Mutex.new
     end
 
-    # NOTE: Exception to earlier notice. Ensure this is called before freeze
     def handler
       @handler ||= Template.handler_class_for_extension(extension)
     end
 
-    # NOTE: Exception to earlier notice. Ensure this is called before freeze
     def compiled_source
       @compiled_source ||= handler.new(nil).compile(self) if handler.compilable?
     end
 
+    def freeze
+      # Eager load and freeze memoized methods
+      handler.freeze
+      compiled_source.freeze
+      super
+    end
+
     def render(view, local_assigns = {})
       view._first_render ||= self
       view._last_render = self

actionpack/lib/action_view/renderable_partial.rb

@@ -3,16 +3,36 @@ module ActionView
     # NOTE: The template that this mixin is beening include into is frozen
     # So you can not set or modify any instance variables
 
+    def variable_name
+      @variable_name ||= name.gsub(/^_/, '').to_sym
+    end
+
+    def counter_name
+      @counter_name ||= "#{variable_name}_counter".to_sym
+    end
+
+    def freeze
+      # Eager load and freeze memoized methods
+      variable_name.freeze
+      counter_name.freeze
+      super
+    end
+
     def render(view, local_assigns = {})
       ActionController::Base.benchmark("Rendered #{path_without_format_and_extension}", Logger::DEBUG, false) do
         super
       end
     end
 
-    def render_partial(view, variable_name, object = nil, local_assigns = {}, as = nil)
-      object ||= view.controller.instance_variable_get("@#{variable_name}") if view.respond_to?(:controller)
-      local_assigns[:object] ||= local_assigns[variable_name] ||= object
-      local_assigns[as] ||= local_assigns[:object] if as
+    def render_partial(view, object = nil, local_assigns = {}, as = nil)
+      object ||= local_assigns[:object] ||
+        local_assigns[variable_name] ||
+        view.controller.instance_variable_get("@#{variable_name}") if view.respond_to?(:controller)
+
+      # Ensure correct object is reassigned to other accessors
+      local_assigns[:object] = local_assigns[variable_name] = object
+      local_assigns[as] = object if as
+
       render_template(view, local_assigns)
     end
   end

actionpack/lib/action_view/template.rb

@@ -17,19 +17,13 @@ module ActionView #:nodoc:
     end
 
     def freeze
-      # Eager load memoized methods
-      format_and_extension
-      path
-      path_without_extension
-      path_without_format_and_extension
-      source
-      method_segment
-
-      # Eager load memoized methods from Renderable
-      handler
-      compiled_source
-
-      instance_variables.each { |ivar| ivar.freeze }
+      # Eager load and freeze memoized methods
+      format_and_extension.freeze
+      path.freeze
+      path_without_extension.freeze
+      path_without_format_and_extension.freeze
+      source.freeze
+      method_segment.freeze
 
       super
     end
@@ -51,12 +45,12 @@ module ActionView #:nodoc:
     end
 
     def source
-      @source ||= File.read(@filename)
+      @source ||= File.read(filename)
     end
 
     def method_segment
       unless @method_segment
-        segment = File.expand_path(@filename)
+        segment = File.expand_path(filename)
         segment.sub!(/^#{Regexp.escape(File.expand_path(RAILS_ROOT))}/, '') if defined?(RAILS_ROOT)
         segment.gsub!(/([^a-zA-Z0-9_])/) { $1.ord }
         @method_segment = segment