add [sum|count]_[daily|weekly|monthly] to your AR models for MySQL AND Postgres

Increment ActiveRecord's counter cache column asynchronously using Resque (and resque-lock-timeout).

Attribute serializer for AR models

A little gem for Rails that provides the ability to specify attributes that will not be loaded when the record is loaded from the database, until you explicitly refer to those attributes. This is useful when you have a lot of text columns in your table; in this case lazy-loading the text attributes is a good way to lend your server a hand and cut down on database access time.

Make ActiveRecord's PostgreSQL adapter always use bigint columns

Add binary flag attributes to AR model using one DB field.

Framework for working with data migrations and seeds in a Rails application

An modern cacheing library for ActiveRecord inspired by cache-money and second_level_cache.

Determine whether or not ActiveRecord migrations are considered safe to know if an app needs to go into maintenance on deploy

ArcherPlume Blog FrameWork is a gem in which users can install and after installing , can copy the contents of the gem( in which is a rails application). Also,don't forget to take the survey when you run the server in the blog's directory, so you can have a better blog! Also RSpec supporthas been upgrade

A tool to simplify creation and development of Ruby daemons.

*Atomic archiving/unarchiving for ActiveRecord* acts_as_paranoid and similar plugins/gems work on a record-by-record basis and make it difficult to restore records atomically (or archive them, for that matter). Because ArchivalRecord's #archive! and #unarchive! methods are in transactions, and every archival record involved gets the same archive number upon archiving, you can easily restore or remove an entire set of records without having to worry about partial deletion or restoration. Additionally, other plugins generally change how destroy/delete work. ArchivalRecord does not, and thus one can destroy records like normal.

Sometimes you just need a descriptive value of an item you are archiving. This is what archive_2s was made for.

Archiving aged records to archive table

A collection of methods and classes that unleash the power of the database :D

Duplicate a complete or partial database with ActiveRecord while controlling sensitive values.

Activerecord database tools.

copy data from one dbms to another via active_record

ActiveRecord extension to allow for updating numerical attributes using deltas.

A ruby gem to handle ActiveRecord like Arel.