#948 make template inheritance optional

actionpack/lib/abstract_controller/rendering.rb

@@ -117,11 +117,14 @@ module AbstractController
     # The prefixes used in render "foo" shortcuts.
     def _prefixes
       prefixes = [controller_path]
-      parent_controller = self.class.superclass
 
-      until parent_controller.abstract?
+      if template_inheritance?
-        prefixes << parent_controller.controller_path
+        parent_controller = self.class.superclass
-        parent_controller = parent_controller.superclass
+
+        until parent_controller.abstract?
+          prefixes << parent_controller.controller_path
+          parent_controller = parent_controller.superclass
+        end
       end
 
       prefixes
@@ -173,5 +176,10 @@ module AbstractController
 
     def _process_options(options)
     end
+
+    def template_inheritance?
+      # is there a better way to check for config option being set?
+      config.template_inheritance.nil? ? true : config.template_inheritance
+    end
   end
 end

actionpack/test/controller/new_base/render_test.rb

@@ -53,6 +53,10 @@ module Render
     prepend_view_path ActionView::FixtureResolver.new("render/child_render/overriden_with_own_view_paths_prepended.html.erb" => "child content")
   end
 
+  class ChildRenderWithoutInheritanceController < BlankRenderController
+    config.template_inheritance = false
+  end
+
   class RenderTest < Rack::TestCase
     test "render with blank" do
       with_routing do |set|
@@ -135,4 +139,11 @@ module Render
     end
   end
 
+  class TestNoViewInheritance < Rack::TestCase
+    test "Template from parent controller does not get picked if config.action_controller.template_inheritance = false" do
+      assert_raises(ActionView::MissingTemplate) do
+        get "/render/child_render_without_inheritance/index", {}, "action_dispatch.show_exceptions" => false
+      end
+    end
+  end
 end