Ruby (and Rails) attribute cleaning support, provides some nice and easy to enhance default normalization strategies.

A Vagrant plugin that allows management of containers using LXD.

A Sprinkle provisioner for Vagrant.

Automatically validate ActiveRecord models based on the database schema.

Validacity adds an extra layer of validation objects where all your validation logic can be moved to.

ActiveModel Interface for validatable

Validate HTML files as they leave your app by rack or by mail or by turbo-stream

Automatically validate limits for ActiveRecord attributes.

Email validator that hits freemium providers one by one and returns normalized response.

Provides a clean DSL to validate params for controller actions.

Rails plugin that uses George Carlin's list of seven dirty words (aka swear words, aka cuss words) to check for decency on ActiveRecord model attributes.

Validate iban

Validations for making ActiveRecord objects immutable.

ActiveModel validator that ensures Word-tags hasn't been accidentally pasted into WYSIWYG attributes.

Delegates validation between objects

log active model validation errors to get better insights in the usability of your forms

Adds String#valid_date? method to add utility to the Rails String#to_date method. Determines whether the string contains a valid date, to check before converting to a date and avoiding an exception.

Adds valid transition validations to AR.

A tiny gem for value objects.

values_for makes your ActiveRecord-backed class work with an enumerable type. Instead of existing ActiveRecord plugins such as enum_fu, which store the enumerable attribute as an integer, values_for stores the content of the enumerable attribute in a varchar column of the database....