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Ckeditor integration gem for rails
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CKEditor is a ready-for-use HTML text editor designed to simplify web content creation. It's a WYSIWYG editor that brings common word processor features directly to your web pages. Enhance your website experience with our community maintained editor.


  • Ckeditor version 4.3.4 (full)
  • Rails 4 integration
  • Files browser
  • HTML5 files uploader
  • Hooks for formtastic and simple_form forms generators
  • Integrated with authorization framework CanCan and Pundit


For basic usage just include ckeditor gem:

gem 'ckeditor'

Using with ruby 1.8.7

For usage with ruby 1.8.7 you need to specify gem version:

gem 'ckeditor', '4.0.4'

For files uploading support you need generage models for file storage. Currently supported next backends:

  • ActiveRecord (paperclip, carrierwave, dragonfly)
  • Mongoid (paperclip, carrierwave, dragonfly)

How generate models for store uploading files

ActiveRecord + paperclip

For active_record orm is used paperclip gem (it's by default).

gem 'paperclip'

rails generate ckeditor:install --orm=active_record --backend=paperclip

ActiveRecord + carrierwave

gem 'carrierwave'
gem 'mini_magick'

rails generate ckeditor:install --orm=active_record --backend=carrierwave

Mongoid + paperclip

gem 'mongoid-paperclip', :require => 'mongoid_paperclip'

rails generate ckeditor:install --orm=mongoid --backend=paperclip

Mongoid + carrierwave

gem 'carrierwave-mongoid', :require => 'carrierwave/mongoid'
gem 'mini_magick'

rails generate ckeditor:install --orm=mongoid --backend=carrierwave

Load generated models

All ckeditor models will be generated into app/models/ckeditor folder. Autoload ckeditor models folder (application.rb):

config.autoload_paths += %W(#{config.root}/app/models/ckeditor)

Mount engine in your routes (config/routes.rb):

mount Ckeditor::Engine => '/ckeditor'


Include ckeditor javascripts rails 3.2 (application.js):

//= require ckeditor/init

Form helpers:

<%= form_for @page do |form| -%>
  <%= form.cktext_area :notes, :class => 'someclass', :ckeditor => {:language => 'uk'} %>
  <%= form.cktext_area :content, :value => 'Default value', :id => 'sometext' %>
  <%= cktext_area :page, :info, :cols => 40, :ckeditor => {:uiColor => '#AADC6E', :toolbar => 'mini'} %>
<% end -%>

All ckeditor options here

In order to configure the ckeditor default options, create files:



Usage with Rails 4 assets

In order to use rails 4 assets with digest in production environment you need some preparing.

First, you need to include in application.js before ckeditor/init

//= require ckeditor/override

It forces ckeditor core to respect digested assets.

Next you need to check, that some non-core plugins and skins don't use core ckeditor functions to determine path to assets. Therefore we have to create a rake task thats copies the original assets and creates a non-digest version of it. Some example of such rake task is:

namespace :ckeditor do
  desc 'Create nondigest versions of some ckeditor assets (e.g. moono skin png)'
  task :create_nondigest_assets do
    fingerprint = /\-[0-9a-f]{32}\./
    for file in Dir['public/assets/ckeditor/contents-*.css', 'public/assets/ckeditor/skins/moono/*.png']
      next unless file =~ fingerprint
      nondigest = file.sub fingerprint, '.' # contents-0d8ffa186a00f5063461bc0ba0d96087.css => contents.css
      FileUtils.cp file, nondigest, verbose: true

# auto run ckeditor:create_nondigest_assets after assets:precompile
Rake::Task['assets:precompile'].enhance do

This also works on heroku. Even after restarting dynos running on a cedar stack, the assets will remain.

You can include this rake task in a capistrano task (if you are deploying via capistrano):

desc 'copy ckeditor nondigest assets'
task :copy_nondigest_assets, roles: :app do
  run "cd #{latest_release} && #{rake} RAILS_ENV=#{rails_env} ckeditor:create_nondigest_assets"
after 'deploy:assets:precompile', 'copy_nondigest_assets'

Periodically check your error monitoring tool, if you see some part of ckeditor try to load unexisting non-digest asset - if so just add it in the ckeditor rake task.

Also you can use gem non-stupid-digest-assets, which do the same work.

To reduce the asset precompilation time, you can limit plugins and/or languages to those you need:

# in config/initializers/ckeditor.rb

Ckeditor.setup do |config|
  config.assets_languages = ['en', 'fr']
  config.assets_plugins = ['image', 'smiley']


jQuery sample:

<script type='text/javascript' charset='UTF-8'>
    $('form[data-remote]').bind('ajax:before', function(){
      for (instance in CKEDITOR.instances){

Formtastic integration

<%= form.input :content, :as => :ckeditor %>
<%= form.input :content, :as => :ckeditor, :input_html => { :ckeditor => { :height => 400 } } %>

SimpleForm integration

<%= form.input :content, :as => :ckeditor, :input_html => { :ckeditor => {:toolbar => 'Full'} } %>

CanCan integration

To use cancan with Ckeditor, add this to an initializer.

# in config/initializers/ckeditor.rb

Ckeditor.setup do |config|
  config.authorize_with :cancan

At this point, all authorization will fail and no one will be able to access the filebrowser pages. To grant access, add this to Ability#initialize

# Always performed
can :access, :ckeditor   # needed to access Ckeditor filebrowser

# Performed checks for actions:
can [:read, :create, :destroy], Ckeditor::Picture
can [:read, :create, :destroy], Ckeditor::AttachmentFile

Pundit integration

Just like CanCan, you can write this code in your config/initializers/ckeditor.rb file

Ckeditor.setup do |config|
  config.authorize_with :pundit

And then, generate the policy files for model Picture and AttachmentFile

$ rails g ckeditor:pundit_policy

By this command, you will got two files:

app/policies/ckeditor/picture_policy.rb app/policies/ckeditor/attachment_file_policy.rb

By default, only the user that logged in can access the models(with action index and create), and only the owner of the asset can destroy the resource.

You can simply customize these two policy files as you like.


    page_title: 'CKEditor Files Manager'
    confirm_delete: 'Delete file?'
      cancel: 'Cancel'
      upload: 'Upload'
      delete: 'Delete'
      next: 'Next'


$> rake test
$> rake test CKEDITOR_ORM=mongoid
$> rake test CKEDITOR_BACKEND=carrierwave

$> rake test:controllers
$> rake test:generators
$> rake test:integration
$> rake test:models

This project rocks and uses MIT-LICENSE.

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