3 files changed, 72 insertions, 33 deletions

diff --git a/actionpack/lib/action_view/render/partials.rb b/actionpack/lib/action_view/render/partials.rb
index 64f08c447d..83175ab4cf 100644
--- a/actionpack/lib/action_view/render/partials.rb
+++ b/actionpack/lib/action_view/render/partials.rb
@@ -184,6 +184,7 @@ module ActionView
       def initialize(view_context, options, block)
         partial = options[:partial]
 
+        @memo           = {}
         @view           = view_context
         @options        = options
         @locals         = options[:locals] || {}
@@ -207,9 +208,7 @@ module ActionView
       end
 
       def render_collection
-        # Even if no template is rendered, this will ensure that the MIME type
-        # for the empty response is the same as the provided template
-        @options[:_template] = default_template = find_template
+        @options[:_template] = template = find_template
 
         return nil if collection.blank?
 
@@ -217,15 +216,46 @@ module ActionView
           spacer = find_template(@options[:spacer_template]).render(@view, @locals)
         end
 
-        segments = []
+        result = template ? collection_with_template(template) : collection_without_template
+        result.join(spacer)
+      end
+
+      def collection_with_template(template)
+        options = @options
+
+        segments, locals, as = [], @locals, options[:as] || :object
+
+        variable_name = template.variable_name
+        counter_name  = template.counter_name
+        locals[counter_name] = -1
+
+        collection.each do |object|
+          locals[counter_name] += 1
+          locals[variable_name] = object
+          locals[as] = object if as
+
+          segments << template.render(@view, locals)
+        end
+        segments
+      end
+
+      def collection_without_template
+        options = @options
+
+        segments, locals, as = [], @locals, options[:as] || :object
+        index, template = -1, nil
+
+        collection.each do |object|
+          template = find_template(partial_path(object))
+          locals[template.counter_name] = (index += 1)
+          locals[template.variable_name] = object
+          locals[as] = object if as
 
-        collection.each_with_index do |object, index|
-          template = default_template || find_template(partial_path(object))
-          @locals[template.counter_name] = index
-          segments << render_template(template, object)
+          segments << template.render(@view, locals)
         end
 
-        segments.join(spacer)
+        @options[:_template] = template
+        segments
       end
 
       def render_template(template, object = @object)
diff --git a/actionpack/lib/action_view/template/resolver.rb b/actionpack/lib/action_view/template/resolver.rb
index ebfc6cc8ce..10f664736f 100644
--- a/actionpack/lib/action_view/template/resolver.rb
+++ b/actionpack/lib/action_view/template/resolver.rb
@@ -41,8 +41,10 @@ module ActionView
     end
 
     def handler_glob
-      e = TemplateHandlers.extensions.map{|h| ".#{h},"}.join
-      "{#{e}}"
+      @handler_glob ||= begin
+        e = TemplateHandlers.extensions.map{|h| ".#{h},"}.join
+        "{#{e}}"
+      end
     end
     
     def formats_glob
@@ -60,6 +62,10 @@ module ActionView
 
   class FileSystemResolver < Resolver
 
+    def self.cached_glob
+      @@cached_glob ||= {}
+    end
+
     def initialize(path, options = {})
       raise ArgumentError, "path already is a Resolver class" if path.is_a?(Resolver)
       super(options)
@@ -105,20 +111,22 @@ module ActionView
 
     # :api: plugin
     def details_to_glob(name, details, prefix, partial, root)
-      path = ""
-      path << "#{prefix}/" unless prefix.empty?
-      path << (partial ? "_#{name}" : name)
-
-      extensions = ""
-      [:locales, :formats].each do |k|
-        extensions << if exts = details[k]
-          '{' + exts.map {|e| ".#{e},"}.join + '}'
-        else
-          k == :formats ? formats_glob : ''
+      self.class.cached_glob[[name, prefix, partial, details, root]] ||= begin
+        path = ""
+        path << "#{prefix}/" unless prefix.empty?
+        path << (partial ? "_#{name}" : name)
+
+        extensions = ""
+        [:locales, :formats].each do |k|
+          extensions << if exts = details[k]
+            '{' + exts.map {|e| ".#{e},"}.join + '}'
+          else
+            k == :formats ? formats_glob : ''
+          end
         end
-      end
       
-      "#{root}#{path}#{extensions}#{handler_glob}"
+        "#{root}#{path}#{extensions}#{handler_glob}"
+      end
     end
 
     # TODO: fix me
diff --git a/actionpack/lib/action_view/test_case.rb b/actionpack/lib/action_view/test_case.rb
index e51744d095..c2ccd1d3a5 100644
--- a/actionpack/lib/action_view/test_case.rb
+++ b/actionpack/lib/action_view/test_case.rb
@@ -9,14 +9,16 @@ module ActionView
     end
 
     attr_internal :rendered
-    alias_method :_render_template_without_template_tracking, :_render_single_template
-    def _render_single_template(template, local_assigns, &block)
-      if template.respond_to?(:identifier) && template.present?
-        @_rendered[:partials][template] += 1 if template.partial?
-        @_rendered[:template] ||= []
-        @_rendered[:template] << template
-      end
-      _render_template_without_template_tracking(template, local_assigns, &block)
+  end
+
+  class Template
+    alias_method :render_without_tracking, :render
+    def render(view, locals, &blk)
+      rendered = view.rendered
+      rendered[:partials][self] += 1 if partial?
+      rendered[:template] ||= []
+      rendered[:template] << self
+      render_without_tracking(view, locals, &blk)
     end
   end
 
@@ -68,9 +70,8 @@ module ActionView
       def initialize
         @request = ActionController::TestRequest.new
         @response = ActionController::TestResponse.new
-        
+
         @params = {}
-        send(:initialize_current_url)
       end
     end