HasSecureUuid

HasSecureUuid provides an easy way to generate uniques random uuid's for any model in ruby on rails. SecureRandom::uuid is used to generate the unique id's, 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 with this even more unlikely scenario.

Installation

Add this line to your application's Gemfile:

gem 'has_secure_uuid'

And then run:

$ bundle

Or install it yourself as:

$ gem install has_secure_uuid

Setting your Model

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

rails g migration AddidentifierToUsers uuid:string
=>
   invoke  active_record
   create    db/migrate/20150424010931_add_uuid_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_uuid to the model:

# Schema: User(uuid:string, identifier:string)
class User < ActiveRecord::Base
  has_secure_uuid
end

user = User.new
user.save
user.uuid # => "6c3d256c-aaa7-443a-a16b-75a99ecde277"
user.regenerate_uuid # => true

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

# Schema: User(uuid:string, identifier:string)
class User < ActiveRecord::Base
  has_secure_uuid :identifier
end

user = User.new
user.save
user.identifier # => "6c3d256c-aaa7-443a-a16b-75a99ecde277"
user.regenerate_identifier # => true

Running tests

Running

$ rake test

Should return

3 runs, 5 assertions, 0 failures, 0 errors, 0 skips

Contributing

Fork it ( https://github.com/sndrgrdn/has_secure_uuid/fork )
Create your feature branch (git checkout -b my-new-feature)
Commit your changes (git commit -am 'Add some feature')
Push to the branch (git push origin my-new-feature)
Create a new Pull Request

Modified from: https://github.com/robertomiranda/has_secure_token