ActiveModelChangeset provides a lightweight changeset abstraction for Ruby on Rails applications. It combines type casting, attribute normalization, validation and diff calculation into a single object, enabling safe and explicit create/update operations with patch semantics. The gem is designed...

Provides coercions for ActiveModel objects

CSV Validator for Active Model

ActiveModel-style email address format validator

Simple email confirmation model implemented on top of ActiveModel::Model

An ActiveModel email validator based on the Mail gem.

Builds a tree of errors instead of the 1-dimension one generated by ActiveMode::Base#errors.messages.

Allows to get errors type from an activemodel class, as a symbol, prior to the translation

Common validations for ActiveModel

Serializing models to a single string makes it easy to pass references around.

A Rails validator for immutable attributes.

Interdependent model validations

ActiveModel validator for ip address.

A IPv4 and IPv6 validator for Rails 3 and 4.

Enqueue background jobs from model classes

This gem has been renamed active_model_jobs.

A simple json validator based on ActiveModel.

Provides the ActiveModel::Lint::Tests for test-unit or minitest an RSpec shared example.

Provides a Logger::LogDevice that can save Ruby Logger messages to an array in your model

Simple password model implemented on top of ActiveModel::Model