A simple universally unique ID generation library.

UUID generator for producing universally unique identifiers based on RFC 4122 (http://www.ietf.org/rfc/rfc4122.txt).

Simple, scalable UUID generation.

Guid is a Ruby library for portable GUID/UUID generation. At the moment it can be used on Windows (except first release of Win95 and older) and on Unix. This is a fork of David Garamond's ruby-uuid library.

Provides UUID generation for Mongoid models. It includes a validator for UUIDs.

Finds linked posts using UUIDs to make them available to Liquid

UUID v4 identifier generator with support for generating and parsing UUIDs, and dependency substitution

Add binary (not string) UUIDs to ActiveRecord in MySQL

UUID generator/parser in <300 lines. It fully supports UUID versions 1, 3, 4 and 5.

Druuid generates 64-bit, time-sortable UUIDs.

This module creates an isomorphic representation of a UUID which is guaranteed to fit into the grammar of the XML NCName construct, which also happens to exhibit (modulo case and hyphens) the same constraints as identifiers in nearly all programming languages. Provides case sensitive (Base64) and case-insensitive (Base32) variants.

Creates UUID version 5 out of scientific name string. It uses globalnames.org domain for DNS namespace. There is a 1:1 relationship between the string and the corresponding UUID, so it allows globally connect data about a name string originated from independent sources without a need to negotiate identifiers.

Implementation of UUID v7

Let ActiveRecord serialize and cast your UUIDs to and from binary columns in your database.

RSpec UUID matcher

An AR abstract superclass that features a UUID as the default 'id' column, and a generator.

AR model to store uuids assigned to various resources. It is expected a resource can be identified by many UUIDs.

This is a UUID class intended to help control data locality when inserting into a distributed data system, such as MongoDB or HBase. There is also a Java implementation. This version does not conform to any external standard or spec. Developed at Groupon in Palo Alto by Peter Bakkum and Michael Craig.

A fast Ruby implementation of UUID versions 4, 6, 7, and 8 🪪

Helpers to use UUID with uuidtools