If only this were easier...

Model.validates { presence_of :name }

Manage your Amazon Kindle highlights: Sync and cache to an ActiveRecord database and output in various formats

This plugin lets you define specific columns in ActiveRecord models to be loaded lazily

Use database lookup tables in AR models.

ManageIQ Appliance Console

Rails plugin to set created_by, updated_by, deleted_by to ActiveRecord objects. Supports associations.

Ruby wrapper for Amazon CloudSearch (aws-sdk), with ActiveRecord, Mongoid support for easy integration with your Rails application

Writer methods parameters normalization

once-ler supercharges your let's and before's with the performance of before(:all)

Migrations

OvirtMetrics is an ActiveRecord-based gem for reading the oVirt History database.

Pandas wrapper for Ruby

Allow Paperclip attachments to be stored on FTP servers

Auto-order table columns for optimize disk space usage

ActiveRecord extension for querying hstore and jsonb.

Adds methods to ActiveRecord::Migration to create and manage PostgreSQL objects in Rails

Simple API to run Model methods in the background

This gem is an ActiveRecord extension which provides a convenient interface for managing per row properties.

Provides the ability to create Active Record objects from Protocol Buffer messages and vice versa.