active_model_secure_token

Provides an easy way to generate uniques random tokens for any ActiveModel. SecureRandom::base58 is used to generate the 24-character unique tokens, so collisions are highly unlikely.

Note If you're worried about possible collissions, there's a way to generate a race condition in the database in the same way that validates_uniqueness_of can. You're encouraged to add an unique index in the database to deal

Add this line to your application's Gemfile:

gem 'active_model_secure_token'

And then run:

$ bundle

Or install it yourself as:

$ gem install active_model_secure_token

This gem does not depend on ActiveRecord, only on ActiveModel. It works fine with ActiveRecord and Mongoid. You will need to include ActiveModel::SecureToken in your model/document before you can use it.

The first step is to generate a migration in order to add the token key field.

rails g migration AddTokenToUsers token:string
=>
   invoke  active_record
   create    db/migrate/20150424010931_add_token_to_users.rb

Then run rake db:migrate in order to update users table in the database. The next step is to add has_secure_token to the model:

# Schema: User(token:string, auth_token:string)
class User < ActiveRecord::Base
  include ActiveModel::SecureToken
  has_secure_token
end

user = User.new
user.save
user.token # => "pX27zsMN2ViQKta1bGfLmVJE"
user.regenerate_token # => true

To use a custom column to store the token key field you can specify the column_name option. See example above (e.g: auth_token):

# Schema: User(token:string, auth_token:string)
class User < ActiveRecord::Base
  include ActiveModel::SecureToken
  has_secure_token :auth_token
end

user = User.new
user.save
user.auth_token # => "pX27zsMN2ViQKta1bGfLmVJE"
user.regenerate_auth_token # => true

Add the field, include this gem and enable it like so:

class User
  include Mongoid::Document
  include ActiveModel::SecureToken
  field :token, type: String
  has_secure_token
end

The Mongoid document has all the same methods as the ActiveRecord model.

Running

$ rake test

Should return

8 runs, 14 assertions, 0 failures, 0 errors, 0 skips