SQLite constraints in migrations similiar to ActiveRecord validations

ActiveModel-compliant form objects for rails app. Forms have data and behavior. Let them be the objects they want to be. Plus, get presentation- specific validation logic out of your models.

Make ActiveRecord Validation easier to share as Schema

Nested Attributes Validation Collection for Rails

Nested validations allow a parent's validity to include those of child attributes. Errors messages will be copied from the child attribute to the parent.

Enkrip will encrypt & decrypt Active Record attributes seamlessly with Message Encryptor. By default compatible with Active model validation

A Rails engine that provides a response mechanism for Let's Encrypt ACME - Simple HTTP - Identifier Validation Challenges on 12 factor apps like those deployed on Heroku as well as the rake task to generate the certificate from your local machine.

Numverify: Global Phone Number Validation & Lookup JSON API

String, time, file, crypto, array, validation, debug, DSL, formatting and more.

It uses ActiveSupport's String#parameterize to create the slug. There are no validations. No slug history. No extra tables or models.

Allow Paperclip to pass attachments as data-uri on unsaved records. Useful when dealing with forms and validation errors.

A library for parameter validation and parsing. A handy way to check GET/POST params in Ruby webframeworks (like Rails or Sinatra).

A DSL for validating request parameters, raises exceptions when validation failed. Currently only supports Rails.

Provides validates :password for ActiveModel

Simple JSON Validation and rspec matchers

Flexible DRY validations with API docs generation done right TLDR; parametrics on steroids.

Random Poetry Scraper is a command line gem which returns a configurable number of poems scraped from poemhunter.com. The gem allows you to consume the poems either through a JSON dump or through a command line "pleasure reading" interface. ~Most~ poems on poemhunter.com are in English, but not a...

PIS/PASEP validations for pure Ruby and ActiveRecord apps

Like with_options but merges :if and :unless conditions. Convenient for Active Model or Active Record validations and callbacks.

Give you the ability to search the Australia Post Web site with either Suburb or Postcode, and return an array of Locations. Also add's validation methods to ActiveRecord Objects to allow you to validate that A Postcode + State + Suburb is correct