EncryptionMigrator

This gem allows you to un-encrypt attr_encrypted fields and convert them back to regular fields.

Add this line to your application's Gemfile:

gem 'encryption_migrator'

Here is the encrypted attribute that I want to remove:

2.3.0 :001 > User.first
  User Load (0.6ms)  SELECT  `users`.* FROM `users`  ORDER BY `users`.`id` ASC LIMIT 1
 => #<User id: 1, created_at: "2016-02-20 12:27:46", updated_at: "2016-02-20 12:27:46", encrypted_name: "MoVXQ76yxiQPgJ3mdkR81A==\n">

1. Remove attr_encrypted line from models:

class User < ActiveRecord::Base
  attr_encrypted :name, :key => 'a secret key', :attribute => 'encrypted_name' # => remove this line
end

2. Add a migration to un-encrypt columns:

class UnencryptFields < ActiveRecord::Migration
  def up
    unencrypt_field :users, :name, key: 'a secret key'
  end
end

Now you can see that the field has been unencrypted:

2.3.0 :001 > User.first
  User Load (0.4ms)  SELECT  `users`.* FROM `users`  ORDER BY `users`.`id` ASC LIMIT 1
 => #<User id: 1, created_at: "2016-02-20 12:27:46", updated_at: "2016-02-20 12:27:46", name: "tom">

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/encryption_migrator.

The gem is available as open source under the terms of the MIT License.