# Couldn't find file 'jquery' rails 3.1 stable mountable engine

**URL:** <https://www.ruby-forum.com/t/couldnt-find-file-jquery-rails-3-1-stable-mountable-engine/211342>\
**Category:** Engines\
**Created:** [September 1, 2011, 8:55pm UTC](https://www.ruby-forum.com/t/couldnt-find-file-jquery-rails-3-1-stable-mountable-engine/211342 "2011-09-01T20:55:56Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![dubstep](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/cdc98d/32.png) [@dubstep](https://www.ruby-forum.com/u/dubstep)\
**Post date:** [September 1, 2011, 8:55pm UTC](https://www.ruby-forum.com/t/couldnt-find-file-jquery-rails-3-1-stable-mountable-engine/211342/1 "2011-09-01T20:55:56Z")

</div>

When I create a new engine in Rails 3.1 stable and then access the dummy  
app or the engine I get an error say that the app can’t find jquery.

I’ve created the engine using  
rails plugin new coffee --mountable

and created a basic controller in the engine and the dummy app. If I  
remove the javascript include tag, everything works. But with the tag  
there it just bails since it can’t fine jQuery.  
The jquery-rails gem is installed. I have jquery as a dependency in my  
gemspec file. I’ve even added an Gemfile to the dummy app just to try,  
but it gives the same error.

accessing the dummy app

Sprockets::FileNotFound in Root#index  
couldn’t find file ‘jquery’  
(in  
/Webapps/coffee/test/dummy/app/assets/javascripts/application.js:7)

Started GET “/” for 127.0.0.1 at 2011-09-01 20:31:01 +0200  
Processing by RootController#index as HTML  
Rendered root/index.html.erb within layouts/application (8.9ms)  
Completed 500 Internal Server Error in 89ms

ActionView::Template::Error (couldn’t find file ‘jquery’  
(in  
/Webapps/coffee/test/dummy/app/assets/javascripts/application.js:7)):  
3:   
4: Dummy  
5: \<%= stylesheet\_link\_tag “application” %\>  
6: \<%= javascript\_include\_tag “application” %\>  
7: \<%= csrf\_meta\_tags %\>  
8:   
9:   
app/views/layouts/application.html.erb:6:in  
`\_app\_views\_layouts\_application\_html\_erb\_\_\_187280571548804820\_2155822020’

accessing the engine

Sprockets::FileNotFound in Coffee/pages#index  
couldn’t find file ‘jquery’  
(in /Webapps/coffee/app/assets/javascripts/coffee/application.js:7)

Started GET “/coffee” for 127.0.0.1 at 2011-09-01 20:49:57 +0200  
Processing by Coffee::PagesController#index as HTML  
Rendered /Webapps/coffee/app/views/coffee/pages/index.html.erb within  
layouts/coffee/application (0.3ms)  
Completed 500 Internal Server Error in 41ms

ActionView::Template::Error (couldn’t find file ‘jquery’  
(in  
/Users/jorgen/Webapps/coffee/app/assets/javascripts/coffee/application.js:7)):  
3:   
4: Coffee  
5: \<%= stylesheet\_link\_tag “coffee/application” %\>  
6: \<%= javascript\_include\_tag “coffee/application” %\>  
7: \<%= csrf\_meta\_tags %\>  
8:   
9: