Import tabular data from spreadsheets or similar sources into data models

Amazon Redshift _makeshift_ adapter for ActiveRecord 4.

Gem adds an "analyze" method to all Active Record query objects. Compatible with PostgreSQL database.

Associate a Ruby PORO with an Active Record class and have it quack like one.

Allows the use of CockroachDB as a backend for ActiveRecord and Rails apps.

This 'acts_as' extension provides multi-table inheritance for rails models.

acts_as_xlsx lets you turn any ActiveRecord::Base inheriting class into an excel spreadsheet. It can be added to any finder method or scope chain and can use localized column and sheet names with I18n.

A Rails library for storing user sessions in a backend database

Compose, decouple and manage domain logic and data persistence separately. Works particularly great for composing form objects!

Download, pull out of a ZIP/TAR/GZ/BZ2 archive, parse, correct, and import XLS, ODS, XML, CSV, HTML, etc. into your ActiveRecord models. Uses Upsert internally for speed.

Ruby workflow/orchestration engine

FastPage applies the MySQL "deferred join" optimization to your ActiveRecord offset/limit queries.

SQL input/output plugin for Fluentd event collector

Fast fuzzy string matching for rails

Preload ActiveRecord associations with graphql-batch

The JitPreloader has the ability to send notifications when N+1 queries occur to help guage how problematic they are for your code base and a way to remove all of the commons explicitly or automatically

Likeable allows you to make your models...well...likeable using redis.

With it you can add the ability to create columns outside the default schema, directly in your model in a similar way that you just know in others projects like DataMapper or MongoMapper.

A phishing kit collector for scavengers

JRuby gem for performing multidimensional queries of relational database data using Mondrian OLAP Java library