ArchiveTree is a Ruby Gem that makes it easy for you to create beautiful chronological archive trees of your models. For instance, you can create a tree for your blog posts.

This is a functional replacement for acts_as_archive in rails 3 applications, the only functionality that is not duplicated is the migration from acts_as_paranoid

Provides an easy way to do something that is possible in Rails but still a bit close to the metal using store_accessor: create typecasted, persistent attributes that are not columns in the database but stored in the JSON "data" column. Also supports infinite nesting of embedded models.

Extends ActiveRecord functionality by adding better finder/query support, as well as supporting mass data import, foreign key, CSV and temporary tables

Merge 2 ActiveRecords, preserving associations and attributes

Fast access to database results without the memory overhead of ActiveRecord objects

Easing the query object pattern in Rails applications.

ActiveRecord data synchronized with frontend DataStore

Override migration methods to support UUID columns without having to be explicit about it.

Add sorting scopes `asc` and `desc` to your ActiveRecord models.

Athar records database deletions to a separate audit table using PostgreSQL triggers, instead of soft-deleting rows in their original tables.

An ActiveRecord extension for writing commonly useful atomic SQL statements to avoid race condition.

This plugin implements attachment storage and processing, integrated with ActiveRecord models and Ruby CGI/Rails-style uploads. Image processing operations including a number of different resizing & thumbnailing modes are provided, and the architecture simplifies clean implementation of other types of processing. Errors are carefully handled to minimize the possibility of broken uploads leaving incomplete or corrupt data. RMagick, MiniMagick, and ImageScience image processors are supported.

Changes behavior of Active Record present?

Store a few extra (non-searchable) attributes away in a bucket. This is probably a horrible idea, but try it anyway.

A simple and non-intrusive way to mark deprecated columns/attributes in your models. Any usage of these attributes will logged with a warning message and a trace of where the deprecated attribute was called. An exception can be optionally raised as well.

A pgcrypto based Encryptor implementation for attr_encrypted

AuditTracker helps you centralize data tracking configuration to be used across different models

Ruby framework for the general-purpose automatic processing

Automatic Foreign Key automatically generates foreign-key constraints when creating tables or adding columns. It uses SQL-92 syntax and as such should be compatible with most databases that support foreign-key constraints.