form_for without :html and with :remote should not error

[#4902 state:committed]
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

actionpack/lib/action_view/helpers/form_helper.rb

@@ -302,7 +302,7 @@ def form_for(record_or_name_or_array, *args, &proc)
           args.unshift object
         end
 
-        options[:html][:remote] = true if options.delete(:remote)
+        (options[:html] ||= {})[:remote] = true if options.delete(:remote)
 
         output = form_tag(options.delete(:url) || {}, options.delete(:html) || {})
         output << fields_for(object_name, *(args << options), &proc)

actionpack/test/template/form_helper_test.rb

@@ -644,6 +644,26 @@ def test_form_for_with_remote
     assert_dom_equal expected, output_buffer
   end
 
+  def test_form_for_with_remote_without_html
+    assert_deprecated do
+      form_for(:post, @post, :remote => true) do |f|
+        concat f.text_field(:title)
+        concat f.text_area(:body)
+        concat f.check_box(:secret)
+      end
+    end
+
+    expected =
+      "<form action='http://www.example.com' method='post' data-remote='true'>" +
+      "<input name='post[title]' size='30' type='text' id='post_title' value='Hello World' />" +
+      "<textarea name='post[body]' id='post_body' rows='20' cols='40'>Back to the hill and over it again!</textarea>" +
+      "<input name='post[secret]' type='hidden' value='0' />" +
+      "<input name='post[secret]' checked='checked' type='checkbox' id='post_secret' value='1' />" +
+      "</form>"
+
+    assert_dom_equal expected, output_buffer
+  end
+
   def test_form_for_without_object
     form_for(:post, :html => { :id => 'create-post' }) do |f|
       concat f.text_field(:title)