Translatable columns for Rails 4.2 or better, stored in the model table itself.

Suffering from ActiveRecord instantiation anxiety? Try Valium. It saves your CPU and memory for more important things, retrieving just the values you're interested in seeing.

Any_of allows to compute dynamic OR queries.

This gem logs where ActiveRecord actually loads record

An Active Record extension for creating associations through lateral joins

It is the library to reconnect automatically when ActiveRecord is disconnected from MySQL.

Integrate PostgreSQL's enumerated types with the Rails enum feature

Adds support for postgres arrays to ActiveRecord

Refresh ActiveRecord connection on each rack request.

Redirect ActiveRecord (Rails) reads to replica databases while ensuring all writes go to the primary database.

Redirect ActiveRecord (Rails) reads to slave databases while ensuring all writes go to the master database.

ActiveRecord sharding extension

Dead simple snapshot versioning for ActiveRecord models and associations.

*Atomic archiving/unarchiving for ActiveRecord-based apps* We had the problem that acts_as_paranoid and similar plugins/gems always work on a record by record basis and made it very difficult to restore records atomically (or archive them, for that matter). Because the archive and unarchive met...

Simple tagging gem for Rails using postgres array.

Client Side Validations for Rails 2.x and 3.x

A Ruby on Rails plugin to add an after_commit callback. This can be used to trigger methods only after the entire transaction is complete.

Adds new features to Arel

Deploy features incrementally to your users

Give your models as-of date temporal extensions. Built entirely for PostgreSQL >= 9.4