Allow to prepend prefix tags to the beginning of the query logs to track name, shard and role of the database

library to cache (memoize) method return values in database

Standalone migrator for non Rails projects

A ruby gem for validating your data migrations

Mule is a database migration tool based on a stand-alone version of Rails Migrations. By default, Mule uses SQL scripts instead of Migrations DSL, so no Ruby coding is required. It supports multi-database environments, including support for existing databases.

Encourage good DB practices in ActiveRecord migrations.

Manage tool for ruby script which executed to DB only once.

Durable queues which commit with database transactions.

Add geometry features on Active Record models

Extract a subset of a relational database for use in development or testing. Provides a simple API to filter rows and preserve referential integrity.

Unload and upload database-tables to a file-system

Tool for database maintenance.

DBViewer is a mountable Rails engine that provides a simple interface to view database tables and their records.

Database utilities

Deactivatable provides methods and a default_scope to allow ActiveRecord objects to be deactivated instead of deleted. This is useful if an object needs to be removed from general use, but it's data needs to be retained. Additionally, Deactivatable provides the ability to specify depe...

Ensure that all values in an enum are covered

DeclarativeGrid is a gem for rendering grids described in simple DSL

ActiveModel validation against duplicating records.

DeepCloning is a gem that is able to replicate a set of records in depth

A method to deep copy AR objects, including their associations