Input Mask validation for ActiveModel

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

Adds an enumerable attribute to an ActiveRecord-backed class

Undo for Rails/ActiveRecord - covers destroy, update and create

A Rails plugin for merging Active Record models

Traces the belongs_to associations on ActiveRecord::Base descendants to find the minimum cluster in which all foreign keys are fulfilled in the Entity-Relationship Diagram.

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

Similar article extension for middleman-blog. Finds similar articles using tags, part-of-speech or custom lambda.

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.

ActiveRecord 2.3 compatible gem "allowing you to hide and restore records without actually deleting them." Yes, like acts_as_paranoid, only with less code and less complexity.

A simple and robust ActiveRecord extension for database sharding. Supports shards management with hash slots, re-sharding support, efficient KVS queries, limited RDB queries.

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

Convert MongoDB query to Arel for PostgreSQL + JSON

PaperTrail DropIn replacement to store version in MongoDB

Add table-level database locking to ActiveRecord

Connection proxy for ActiveRecord for single master / multiple slave database deployments

ActiveRecord plugin designed to allow simple multiple table inheritance.