This gem extends ActiveRecord::Base to add automatic updating of created_by and updated_by attributes of your models in much the same way that the ActiveRecord::Timestamp module updates created_(at/on) and updated_(at/on) attributes.

Generate models at runtime from a database connection!

[JRuby portion] of the original MailCatcher. MailCatcher runs a super simple SMTP server which catches any message sent to it to display in a web interface. Run mailcatcher, set your favourite app to deliver to smtp://127.0.0.1:9000 instead of your default SMTP server, then check out http://127.0.0.1:9090 to see the mail.

Moduler solution to add search functionality for selected fields.

A user-centric watching extension for Rails 3 applications.

Disabling the rendering of the attribute name for errors by the error_messages_for helper. Simply place a caret as the first character in the message.

Message destination arbiter

A multi-dimensional semantic layer on top of ActiveRecord that allows running pivot table queries and rendering them as CSV, HTML, or KickChart-ready hashes. Supports time dimensions, cohort analysis, custom rollups, and drilling through to the underlying ActiveRecord objects.

Input Mask validation for ActiveModel

This gem aims to provide an easy and faster way to do single database insertions in Rails.

Makes use of SQLite3 in-memory database possible for your Rails tests by preloading the schema.

A Rails plugin for merging Active Record models

Convert mermaid ER diagram to a migration file

Messiah enables using Ruby testing tools for integration testing with platforms that support CGI. Notably, PHP.

Mi is a generator of migration file instead of `rails generate migration`.

MiniTest matchers for ActiveModel::Validations

A collection of assertions for use with minitest and activerecord. Simplifies testing associations and validations by introspecting associations and validations for you models.

A Ruby mailing list library designed to be integrated into other applications.

mmunicode_rails lets you convert you rails app input data to Myanmar Unicode regardless of which fonts the users used.

Iterate through large ActiveRecord datasets