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.

Ruby Amazon Web Services Cloud Search Interface

Keep a DRY history of your ActiveRecord models' changes

Searchlogic makes using ActiveRecord named scopes easier and less repetitive.

RecordFilter is a Pure-ruby criteria API for building complex queries in ActiveRecord. It supports queries that are built on the fly as well as named filters that can be added to objects and chained to create complex queries. It also gets rid of the nasty hard-coded SQL that shows up in most ActiveRecord code with a clean API that makes queries simple and intuitive to build.

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

Adds support in ActiveRecord for foreign_keys, complex indexes and other database-related stuff. Easily create foreign_keys, complex indexes and views.

Return struct results from ActiveRecord relation queries

master-slave replication helper for ActiveRecord

Rescues unique constraint violations and turns them into ActiveRecord errors

Provides a relational feature to your Rails application.

Provides a relational feature to your Rails application.

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)

Provide a language server implementation for ruby in ruby. See https://microsoft.github.io/language-server-protocol/ "A Language Server is meant to provide the language-specific smarts and communicate with development tools over a protocol that enables inter-process communication."

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.