Extraction of part of the intelligence behind Central

Get validation error from database constraint.

Serialize out of the Cerealize Box - a drop-in replacement for ActiveRecord's serialize It can auto transcode old encoding (yaml if you're using AR's serialize), to new encoding (marshal, json, you name it) without any migration.

Simple ActiveRecord plugin for handling merges.

Ruby library for integrating with Changebase.io

A simple, yet flexible solution to tracking changes made to objects in your database.

Tracks changes to your activerecord models

This gem wraps the data to render chart and then it draws those charts in the web and use the same data to render charts as images, which is often useful when you want to render the chart in pdf or attach it to emails

Helper functions for getting your Rails database hooked up to Chartio

This gem was built to compliment the chartkick gem by giving your Active Record models some handy groupings that work across all databases.

A storage engine for time-series data. Eventually to include resampling, statistical and aggregate data management.

Let users `check out` Active Record instances and then release them when they're done editing.

Ruby Library for validating urls in Rails and Javascript in front end

A ruby gem to quickly add rankings & leaderboards to existing models in a rails application

Mailchimp list administration and Campaign builder.

Chimpy syncs your users from your DB to your respective lists in MailChimp.

See http://chinookdatabase.codeplex.com

Slice and dice your cucumber tables with ease!

By using this library, you can incorporate some useful functions into Ruby on Rails.

An awesome replacement for acts_as_nested_set and better_nested_set.