'Sprockets File not Found Exception

I was trying out some sample applications for Rails. I created some controllers and pages. But when i try to access one of them i get an exception on the webpage:

Sprockets::FileNotFound in Pages#home
Showing c:/railscode/test_app/app/views/layouts/application.html.erb
where line #6 raised:

couldn't find file 'jquery'
  (in c:/railscode/test_app/app/assets/javascripts/application.js:7)
Extracted source (around line #6):

    3: <head> 
    4:   <title>TestApp</title> 
    5:   <%= stylesheet_link_tag    "application" %> 
    6:   <%= javascript_include_tag "application" %> 
    7:   <%= csrf_meta_tags %> 8: </head> 9: <body>

Rails.root:`c:/railscode/test_app`

I created some controllers using the command:

$ rails generate controller Pages home contact

  create  app/controllers/pages_controller.rb
   route  get "pages/contact"
   route  get "pages/home"
  invoke  erb
  create    app/views/pages
  create    app/views/pages/home.html.erb
  create    app/views/pages/contact.html.erb
  invoke  rspec
  create    spec/controllers/pages_controller_spec.rb
  create    spec/views/pages
  create    spec/views/pages/home.html.erb_spec.rb
  create    spec/views/pages/contact.html.erb_spec.rb
  invoke  helper
  create    app/helpers/pages_helper.rb
  invoke  rspec
  create     spec/helpers/pages_helper_spec.rb
  invoke  assets
  invoke    js
  create      app/assets/javascripts/pages.js
  invoke    css
  create      app/assets/stylesheets/pages.css

Just wanted to know where the problem could be and where to look? I am accessing the page by the URL: http://localhost:3000/pages/home

ruby-on-railssprockets


Solution 1:[1]

Un-commenting the line

//= require jquery

in application.js file and restarting the application is what worked for me.

Solution 2:[2]

Had a similar problem with FileNotFound for twitter/bootstrap after installing http://metaskills.net/2011/09/26/less-is-more-using-twitter-bootstrap-in-the-rails-3-1-asset-pipeline/

I did rake assets:clean assets:precompile, but that didn't help. What helped was restarting the rails application as suggested by afaf12.

Solution 3:[3]

For me, the solution was to run yarn install. YMMV

Solution 4:[4]

It's quite possible that your jquery-rails gem is outdated. When I ran into a similar error, updating the gem solved the issue.

Did you create this as a Rails 3.1 application from scratch? Or are you downloading code from somewhere (or updating an older app)?

Solution 5:[5]

In rails 6.x.x the problem can be solved by executing

bundle exec rails webpacker:install

Solution 6:[6]

Just add a comment to your config/initialize/assets and then restart your rails server.

Rails.application.config.assets.paths << Rails.root.join('node_modules')

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 afaf12
Solution 2 RAJ
Solution 3 David Hempy
Solution 4 aceofbassgreg
Solution 5 Ri1a
Solution 6 Dharmik Patel

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