Installing Rails 4.2 LTS
This document describes how to swap out the official Rails 4.2 gems with update instructions.. If you have installed Rails LTS before and want to update to a newer version, please see our
Subscribe to ato receive your credentials. If you already have a paid subscription for another version of Rails LTS, you can use the same credentials for Rails 4.2 LTS at no additional cost.
Make sure your project satisfies the system requirement for Rails LTS. This involves upgrading to the latest official Rails 4.2 release.
Make sure that you have Bundler 1.10 or newer by running:Copy
gem list | grep bundler
This should show you a line like this:Copy
If your version is lower than
1.10, you can update Bundler like this:Copy
gem install bundler
Please note that you need to have a compatible version of Bundler on all PCs that will be running your application (developer boxes, production servers, staging servers).
Open the Bundler configuration file (
Gemfile) in your project's root directory and find this line:Copy
Replace that line with the following code:Copy
source 'https://rubygems.org' source 'https://username:firstname.lastname@example.org' do gem 'rails', '~> 4.2.10' gem 'actionmailer', require: false gem 'actionpack', require: false gem 'activemodel', require: false gem 'activerecord', require: false gem 'activesupport', require: false gem 'railties', require: false gem 'actionview', require: false gem 'activejob', require: false gem 'railslts-version', require: false end
passwordwith your personal credentials that you received after subscribing to Rails LTS.
Make sure a colon (
:) separates username and password. If you don't want these credentials in your Gemfile, you can also set them in an environment variable
Note that our repositories are available via SSL (https) only,
http://...will not work.
Run Bundler to complete the installation:Copy
bundle update rails
You might get a lot of unrelated upgrades. If you want to get as few updates as necessary, you can instead try to use this:Copy
bundle update rails actionpack actionview actionmailer activemodel activerecord activesupport railties activejob --conservative
Decide whether to enable optional security enhancements shipped with Rails LTS.
In order to keep maximum compatibility to the official Ruby on Rails releases, Rails LTS disables all additional security features by default. We do however recommend the
:hardenedconfiguration, which includes improvements we believe to be reasonable defaults for increased security in most applications.
Confirm that you are running the latest version of Rails 4.2 LTS.
Follow your normal release process (run tests, push, deploy to staging, do smoke/whatever testing, deploy to production).
Congratulations! You successfully deployed your application using Rails LTS.
If you have chosen to subscribe to the Rails LTS Notification List when signing up, you will be notified whenever a new patch for Rails LTS becomes available.
Rails 4.2 depends on Rack version 1.6.x (which itself is not currently part of Rails LTS). It has some minor security issues on its own. We have a publicthat fixes these issues.
By default, Rails LTS does not allow for strings to be used in polymorphic path helpers, e.g. url_for(['edit', @user]) is not allowed. Symbols are fine. You can opt out of this change