I had this same issue using Rails 3.1.0. Try renaming your file to just new.js.coffee. It should still render erb despite not having the extension on the filename. It’s definitely confusing that view templates don’t follow the same conventions as the asset pipeline.
Thanks to this dialog: https://github.com/rails/jquery-ujs/issues/208 I was able to discover that jquery and jquery_ujs were getting included twice. I guess the jquery-rails gem automatically puts them into application.js, and then I had them included in application.js as well. Seems like for whatever reason application.js automatically bundles everything in app/assets/javascripts/ – even when I remove all … Read more
You can set the content-type with: = form_for(@object, :remote => true, :html => {:’data-type’ => ‘json’}) As described in rails.js line 106.
This behaviour was changed in Rails 5, now it’s disabling submits by default. Rather than accepted answer, I would suggest to use the following configuration: config.action_view.automatically_disable_submit_tag = false or, to do it ad-hoc for specific buttons, add this to the submit button data: { disable_with: false }