Possible problem with dependencies

[mikebevz]

Hi,

I've got the following setup

-Gemfile

gem 'polymer-rails'
gem 'polymer-core-rails'
gem 'polymer-paper-rails'

-components/application.html.erb

//= require polymer/polymer
//= require paper-button/paper-button
//= require core-animated-pages/core-animated-pages

-javascripts/application.js

//= require polymer/platform
//= require jquery
//= require jquery_ujs
//= require turbolinks
//= require_tree .

• layout/application.html.erb

<title>Polycalc</title> <%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track' => true %> <%= javascript_include_tag 'application', 'data-turbolinks-track' => true %> <%= html_import_tag 'application' %> <%= csrf_meta_tags %> - in view/home/index.html.erb

---

In JS console I"ve got an error:

Uncaught NotSupportedError: Failed to execute 'registerElement' on 'Document': Registration failed for type 'core-meta'. A type with that name is already registered. polymer.js:12
f.registerPrototype polymer.js:12
f.register polymer.js:12
d._register polymer.js:13
e.flush polymer.js:12
e.ready polymer.js:12
e.check polymer.js:12
e.go polymer.js:12
d.registerWhenReady polymer.js:13
(anonymous function) polymer.js:13
d platform.js?body=1:16
e platform.js?body=1:16
(anonymous function) platform.js?body=1:16
g platform.js?body=1:16
b.resolve platform.js?body=1:16
b.fetch platform.js?body=1:16
b.handleXhr platform.js?body=1:16

Any idea what it could be? I tried different combinations but it seems like 'polymer-core-rails' and 'polymer-paper-rails' do not like each other.

You cna download Rails app with this problem here - https://www.dropbox.com/s/7aqi4pho5s230o8/polycalc.zip

Thanks