Rails way to harness the power of SQL "EXISTS" statement

Subscribe to changes on ActiveRecord models

Backported from Rails 5.0 to use with 4.x versions

Any_of allows to compute dynamic OR queries.

An Active Record extension for creating associations through lateral joins

Recursively traverse trees using a single SQL query

ActiveRecord Stand-alone migrations

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

This gem enables your model to query the database using the earthdistance extension. This should be much faster than using trigonometry functions over standart indexs.

Refresh ActiveRecord connection on each rack request.

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

Rails ActiveRecord connector for Google Spanner Database

This gem is only needed before Rails 7.1, where the trilogy adapter is built in. When you upgrade to a version after 7.1.a, replace this with `gem "trilogy"` to ensure that trilogy itself is available.

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.

Plugin for running methods on ActiveRecord models after record is committed

With Amountable, you can easily attach, organize and sum Ruby money fields to your models without migrating.

Multidb is an ActiveRecord extension for switching between multiple database connections, such as primary/replica setups.

Write-through and Read-through Cacheing for ActiveRecord