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Editorial Team
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Asked: 2026-06-12T07:33:52+00:00

I’m newbie to ember.js. I’m trying to integrate ember.js with Rails using ember-rails gem.

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I’m newbie to ember.js. I’m trying to integrate ember.js with Rails using ember-rails gem. But when I start server and open my browser console I get following errors:

Uncaught Error: assertion failed: Ember Views require jQuery 1.7 :3000/assets/ember.js?body=1:43
Uncaught TypeError: Cannot call method 'extend' of undefined :3000/assets/ember-data.js?body=1:141
Uncaught ReferenceError: Blog is not defined :3000/assets/store.js?body=1:1
Uncaught ReferenceError: Blog is not defined :3000/assets/controllers/application_controller.js?body=1:1
Uncaught ReferenceError: Blog is not defined :3000/assets/views/application_view.js?body=1:1
Uncaught TypeError: Cannot call method 'template' of undefined :3000/assets/templates/application.js?body=1:1
Uncaught ReferenceError: Blog is not defined :3000/assets/routes/app_router.js?body=1:1
Uncaught ReferenceError: Blog is not defined :3000/assets/blog.js?body=1:10
Uncaught TypeError: Cannot call method 'create' of undefined ember.js:10183
Uncaught ReferenceError: Blog is not defined

How to solve it? Or how to integrate ember.js to rails by manually.

Thank you for advise.

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1 Answer

  1. Editorial Team

    Here’s the issue with ember-rails (https://github.com/emberjs/ember-rails/issues/88)

    To force jquery to be 1.7, you can use the version 1.0.19 of the jquery-rails gem. So change your Gemfile to be:

    gem "jquery-rails", "1.0.19"

    And you’ll be set.

    As an alternative, you could follow the suggestion in the GH issue, and

    var ENV = {'FORCE_JQUERY': true};

    before the ember.js is loaded to override the requirement check for any version of jquery. (I have not tested this).

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