RecordFilter is a Pure-ruby criteria API for building complex queries in ActiveRecord. It supports queries that are built on the fly as well as named filters that can be added to objects and chained to create complex queries. It also gets rid of the nasty hard-coded SQL that shows up in most ActiveRecord code with a clean API that makes queries simple and intuitive to build.

acts_as_versioned is good. This allows an attribute level rollback instead

Log changes to your models

With gem audit_model you can log all changes to your models.

Track changes on Active Record models based on ActiveSupport::Callbacks and ActiveModel::Dirty

Adds audit tables and triggers for postgres databases

Uses created_by_user_id and updated_by_user_id to store the changes made to a record. This is limited to storing the user who created the record and the last user to update the record.

Rails authentication done right

Personal additions for Oauth and OpenID made dead simple

Foo

A JSON based Authorization.

Rule-based programmable permission system.

AuthStrategies is a Warden implementation for sinatra.

Simple versioning with active record models

A simple daemon that checks and downloads assets from Jenkins

Help to format strings in Rails before validation of the Model.

Automagically generate GraphQL types and queries

ActiveRecord extension that allows to infer validation rules from database

automated metareview

Expose all tables and relations in a database as AR models ready for use.