Rails Lens provides unified visualization and annotation for Rails 8.0+ applications, integrating ERD generation and model annotations.

Pattern matching for Rails applications

Introspects a Rails app's models, associations, and columns, then generates a single self-contained HTML file with an interactive entity-relationship diagram.

Patching rails include/select/virtual attributes issue ( https://github.com/rails/rails/issues/15185 )

This is an ActiveRecord integration for the SQL prettifier gem niceql.

Keep a DRY history of your ActiveRecord models' changes

Searchlogic makes using ActiveRecord named scopes easier and less repetitive.

Fast and unobtrusive activity tracking of ActiveRecord models using DataMapper and Redis

Return struct results from ActiveRecord relation queries

master-slave replication helper for ActiveRecord

Model serialization, paging, side-loading and filtering

When you write a web API, you make a promise to the world. RSpec API helps you keep your promise.

ruby-ensembl-api provides a ruby API to the Ensembl databases (http://www.ensembl.org)

SafeFinder lets you define model's null_object through simple DSL, and returns it when you can't find a result.

In an ActiveRecord migration, set the default to create a foreign key and index for all columns that define relatoins.

Adds useful accessors to ActiveRecord's Column object.

Adds support for enum data types in ActiveRecord

Extended support for foreign key constraints in ActiveRecord, including: definition as column attribute; deferrable; and SQLite3 support; cleaner dumps; and more!

Adds support for views to ActiveRecord

Use your SQL database to power instant search for your Rails app with materalized views