Allowed a 'render' arg that goes straight to the render call:

- This new arg will go straight to the `render` call, it allows to pass any options allowed by rails `render` (like the http status or which template/file to render)

CHANGELOG.md

@@ -1,5 +1,11 @@
 ## Unreleased
 
+* `respond_with` now accepts a new kwargs called `:render` which goes straight to the `render`
+   call after an unsuccessful post request. Usefull if for example you need to render a template
+   which is outside of controller's path eg:
+
+   `respond_with resource, render: { template: 'path/to/template' }`
+
 ## 2.3.0
 
 * `verify_request_format!` is aliased to `verify_requested_format!` now.

lib/action_controller/respond_with.rb

@@ -182,11 +182,17 @@ def clear_respond_to
     # to save a resource, e.g. when automatically rendering <tt>:new</tt>
     # after a post request.
     #
-    # Two additional options are relevant specifically to +respond_with+ -
+    # Three additional options are relevant specifically to +respond_with+ -
     # 1. <tt>:location</tt> - overwrites the default redirect location used after
     #    a successful html +post+ request.
     # 2. <tt>:action</tt> - overwrites the default render action used after an
     #    unsuccessful html +post+ request.
+    # 3. <tt>:render</tt> - allows to pass any options directly to the <tt>:render<tt/>
+    #    call after unsuccessful html +post+ request. Usefull if for example you
+    #    need to render a template which is outside of controller's path or you
+    #    want to override the default http <tt>:status</tt> code, e.g.
+    #
+    #    response_with(resource, render: { template: 'path/to/template', status: 422 })
     def respond_with(*resources, &block)
       if self.class.mimes_for_respond_to.empty?
         raise "In order to use respond_with, first you need to declare the " \

lib/action_controller/responder.rb

@@ -200,7 +200,7 @@ def navigation_behavior(error)
       if get?
         raise error
       elsif has_errors? && default_action
-        render :action => default_action
+        render rendering_options
       else
         redirect_to navigation_location
       end
@@ -297,5 +297,13 @@ def json_resource_errors
     def response_overridden?
       @default_response.present?
     end
+
+    def rendering_options
+      if options[:render]
+        options[:render]
+      else
+        { action: default_action }
+      end
+    end
   end
 end

test/action_controller/respond_with_test.rb

@@ -66,6 +66,13 @@ def using_resource_with_action
     end
   end
 
+  def using_resource_with_rendering_options
+    rendering_options = { template: 'addresses/edit', status: :unprocessable_entity }
+    respond_with(resource, render: rendering_options) do |format|
+      format.html { raise ActionView::MissingTemplate.new([], "bar", ["foo"], {}, false) }
+    end
+  end
+
   def using_responder_with_respond
     responder = Class.new(ActionController::Responder) do
       def respond; @controller.render :body => "respond #{format}"; end
@@ -482,6 +489,15 @@ def render(params={})
     assert_equal "foo - #{[:html].to_s}", @controller.response.body
   end
 
+  def test_using_resource_with_rendering_options
+    Customer.any_instance.stubs(:errors).returns(name: :invalid)
+
+    post :using_resource_with_rendering_options
+
+    assert_response :unprocessable_entity
+    assert_equal 'edit.html.erb', @controller.response.body
+  end
+
   def test_respond_as_responder_entry_point
     @request.accept = "text/html"
     get :using_responder_with_respond