A back support for legacy TemplateHandler#render API

actionpack/lib/action_view/template_handler.rb

 # Legacy TemplateHandler stub
-
 module ActionView
+  module TemplateHandlers #:nodoc:
+    module Compilable
+      def self.included(base)
+        base.extend(ClassMethods)
+      end
+
+      module ClassMethods
+        def call(template)
+          new.compile(template)
+        end
+      end
+
+      def compile(template)
+         raise "Need to implement #{self.class.name}#compile(template)"
+       end
+    end
+  end
+
   class TemplateHandler
     def self.call(template)
-      new.compile(template)
+      "#{name}.new(self).render(template, local_assigns)"
+    end
+
+    def initialize(view = nil)
+      @view = view
+    end
+
+    def render(template, local_assigns)
+      raise "Need to implement #{self.class.name}#render(template, local_assigns)"
     end
   end
 end

actionpack/lib/action_view/template_handlers.rb

@@ -4,10 +4,6 @@ module TemplateHandlers #:nodoc:
     autoload :RJS, 'action_view/template_handlers/rjs'
     autoload :Builder, 'action_view/template_handlers/builder'
 
-    # Legacy Compilable stub
-    module Compilable
-    end
-
     def self.extended(base)
       base.register_default_template_handler :erb, TemplateHandlers::ERB
       base.register_template_handler :rjs, TemplateHandlers::RJS

actionpack/test/template/render_test.rb

@@ -175,6 +175,17 @@ def test_render_inline_with_locals_and_compilable_custom_type
     assert_equal 'source: "Hello, <%= name %>!"', @view.render(:inline => "Hello, <%= name %>!", :locals => { :name => "Josh" }, :type => :foo)
   end
 
+  class LegacyHandler < ActionView::TemplateHandler
+    def render(template, local_assigns)
+      "source: #{template.source}; locals: #{local_assigns.inspect}"
+    end
+  end
+
+  def test_render_legacy_handler_with_custom_type
+    ActionView::Template.register_template_handler :foo, LegacyHandler
+    assert_equal 'source: Hello, <%= name %>!; locals: {:name=>"Josh"}', @view.render(:inline => "Hello, <%= name %>!", :locals => { :name => "Josh" }, :type => :foo)
+  end
+
   def test_render_with_layout
     assert_equal %(<title></title>\nHello world!\n),
       @view.render(:file => "test/hello_world.erb", :layout => "layouts/yield")