A ruby gem for active record which simplify the copy of very complex tree data.

Change an ActiveRecord string column into a byte field.

we implemented some automatic caching to first,last and all methods

Make user chattable!

Plugin/gem that provides comment functionality

Adds ActiveRecord model comparison functionality.

Storage of configuration values in database

Extends default CSV behavior to ActiveRecord models

This acts_as extension modifies ActiveRecord classes so they can carry a reference to the instance defined as current for the given request. The library is particularly useful for providing the authenticated user object to models.

adds daterange to AR models

Rails 3 gem to treat an attribute as a decimal (getting and setting floating-point values) but storing it as an integer in the database (useful for prices and other precision-needed attributes like money).

Using acts as default you can set a default row in your activerecord collection, also for has_many relationships

This 'acts_as' extension provides the capability for having a default object. The class that has this specified needs to have a default column defined as an integer, string or boolean on the mapped database table

ActsAsDiffable provides a dead-simple way to compare two instances of a class, including any or all associations, or more complex relationships.

This gem sets the digested value before validation and validates uniqueness of the digested value.

Another paranoid gem

Easy way to define AR attributes that should be stored in lowercase

Editions for ActiveRecord models

A categorizing plugin for Rails Applications

Active Record extender to make a database column enumerable and queryable