Polo travels through your database and creates sample snapshots so you can work with real world data in development.

Provides a database-friendly method for polymorphic relationships

Choose per model and/or controller&action whether a read-only query should be sent to master or a hot standby. Or just use Postamt.on(:slave) { ... }.

Adds helpers to migrations and dumps check constraints to schema.rb

Uses Postgres's powerful COPY command to upsert large sets of data into ActiveRecord tables

Thin ActiveRecord Redshift Adapter extension for existing PostgreSQL adapter.

Ruby/Rails DSL for Prediction.io, an open source machine learning server.

Preload association or scope counts. This can greatly reduce the number of queries you have to perform and thus yield great performance gains.

Super simple way to store prices

Define and enforce pricing plan limits in your Rails SaaS (entitlements, quotas, feature gating). pricing_plans acts as your single source of truth for pricing plans. Define a pricing catalog with feature gating, persistent caps, per‑period allowances, grace periods, and get view/controller/model...

Procore Ruby Gem

Runs regular Rails/ActiveRecord migrations via the Percona Toolkit pt-online-schema-change tool.

APNS support for the modular push daemon.

Adds callback hooks for your ActiveModel models for sending messages to a Pusher channel.

Fast approximate row counts for large PostgreSQL tables using database statistics instead of COUNT(*)

Returns random records for Ruby Models fast and quick

A server health check for active_record.

Rails-bigint-pk modifies Rails so that it uses 64-bit primary and foreign keys. It works with MySQL and PostgreSQL and has versions for Rails 3 and 4.

Easily use 64-bit primary keys in Rails

Provides cross-rails methods for you to upgrade rails, backport features, create easy-to-maintain gems, and so on.