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.

A Rails engine that adds passkey registration and authentication backed by Active Record. Self-contained, pure-Ruby WebAuthn ceremonies (CBOR, COSE, attestation and assertion verification) with stateless signed challenges — no external gems.

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.

Rails 8 (PR #53281) sorts schema.rb columns alphabetically. That breaks db:schema:load parity with production, Postgres column-alignment padding, add_column :after/:before, and bulk-import pipelines that depend on SELECT * column order. This gem prepends ActiveRecord::SchemaDumper to dump columns...

Untied Consumer Synchronizer.

A ActiveRecord backend for Untied Consumer Sync.

Provides the Publisher part of the Untied gem.

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