A Rails validator for uniqueness by date.

ActiveRecord, MongoMapper and general tools for generating unique values e.g. api keys and tokens.

This extension creates values which can be used for invoice numbers, personnel numbers and the like.

A Ruby gem that helps the user implement a checkout system by supplying only the promotional rules

A Rails adaptor that encapsulate measurements and their units in Ruby on Rails.

A minimal endpoint for driving server-side validations from a remote UI

Make your model uniq and identifiable through a readable name.

Rails validators for: date, date_time, ip address, mac address

gem install universe-db

The Locode gem gives you the ability to lookup UN/LOCODE codes.

Unreliable helps uncover bugs in Rails apps that rely on ambiguous database ordering. Installing it makes both your app and your test suite more robust.

Untied Consumer Synchronizer.

A ActiveRecord backend for Untied Consumer Sync.

ActiveRecord untraceable save.

Unveil provides a super simple way to specify which of a model's attributes are available to an API in a Ruby on Rails application.

Manage invoices.

Class table inheritance for ActiveRecord based on updatable views in the database that join parent and children tables

A Ruby Gem for you to write update queries.

Changes ActiveRecord's update_attribute (singular) method to behave more intuitively and consistently like update_attributes (plural). ActiveRecord's built-in update_attribute (singular) will not check validations on the object before saving, unlike update_attributes (plural), which will.

This gem adds to ActiveRecord a method update_by_case that allows you to update multiple records based on case values on a single database hit.