A Rails plugin that makes assigning a UUID to your models a breeze.
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README.markdown

has_uuid

has_uuid provides basic UUID assignment methods for ActiveRecord objects.

It depends on the uuidtools gem.

Installation

script/plugin install git://github.com/norbert/has_uuid.git

Usage

class Post < ActiveRecord::Base
  # automatically assign a UUID to the "uuid" column on create
  has_uuid
end

class Comment < ActiveRecord::Base
  # skip assignment on create
  has_uuid :auto => false
end

class User < ActiveRecord::Base
  # store the UUID in the "token" column, generate version 1 UUIDs
  has_uuid :column => :token, :generator => :timestamp
end

# assign a UUID if a valid one is not already present
@post.assign_uuid

# assign a UUID, replacing whatever is already there
@post.assign_uuid(:force => true)

# assign a UUID and save, replacing whatever is there
@post.assign_uuid!

# check if the current UUID is valid
@post.uuid_valid?

Credits

  • Norbert Crombach
  • Todd Eichel
  • Joerg Batterman