when using respond_with with an invalid resource and custom options, the...

when using respond_with with an invalid resource and custom options, the default response status and error messages should be returned
Signed-off-by: NJosé Valim <jose.valim@gmail.com>

actionpack/lib/action_controller/metal/responder.rb

@@ -156,7 +156,8 @@ def api_behavior(error)
       if get?
         display resource
       elsif has_errors?
-        display resource.errors, :status => :unprocessable_entity
+        # bypass the options merging of display
+        controller.render format => resource.errors, :status => :unprocessable_entity
       elsif post?
         display resource, :status => :created, :location => api_location
       elsif has_empty_resource_definition?

actionpack/test/controller/mime_responds_test.rb

@@ -953,6 +953,23 @@ def test_using_resource_with_status_and_location
     assert_equal 201, @response.status
   end
 
+  def test_using_resource_with_status_and_location_with_invalid_resource
+    errors = { :name => :invalid }
+    Customer.any_instance.stubs(:errors).returns(errors)
+
+    @request.accept = "text/xml"
+
+    post :using_resource_with_status_and_location
+    assert_equal errors.to_xml, @response.body
+    assert_equal 422, @response.status
+    assert_equal nil, @response.location
+
+    put :using_resource_with_status_and_location
+    assert_equal errors.to_xml, @response.body
+    assert_equal 422, @response.status
+    assert_equal nil, @response.location
+  end
+
   def test_using_resource_with_responder
     get :using_resource_with_responder
     assert_equal "Resource name is david", @response.body