WraithDB uses schema.rb as a template to initialize ActiveRecord classes when databases are offline. It does this with minimal overhead, leaving the normal connection object untouched and only interacting with the columns and tables interfaces.

Allows restoring your Active Records from the dead!

Flexible, configurable authorization system for ActiveRecord and an access control DSL for ActionController.

Index reference to Japanese correspondence relation annotate_models

Whenever you need assign an association by its attribute, like name, this gem comes to business.

Abacus is an xdxf parser and semantic toolset for Ruby.

Abot Info

Abot whitelist

Provides services for the mass-import of complex relational data

ActiveRecord CSV Builder

A patch for Rails to support using a public ID column instead of ID for use with accepts_nested_attributes_for

Defers saving of nested associations by ID, and adds dirty tracking of said associations to parent model

A tiny hack for Rails to make Model#as_json(include: :association) return a hash with association keys suffixed with _attributes.

Dynamic attr_accessible for Active Record, inspired by Ryan Bates Railscasts episode 237

Accessitude

Use the policy pattern to define access control mechanisms in Rails. Store user-level, group-level, or org-level permission on any given record or concept in the database with ultra-fast lookups.

Access token for client-side and API authentication.

Account Scopper: Automatically scope your ActiveRecord's model by account. Ideal for multi-account applications.

Provides enhancements to ActiveRecord to handle spatial datatypes in PostgreSQL and MySQL.

An adapter for Rails::ActiveRecord ORM to the KirbyBase pure-ruby DBMS