All of the goodness of ActiveModel (validations, callbacks, etc.) along with declarative typed accessors, JSON serialization, and more.

== FEATURES/PROBLEMS: * a simple FriendMailer object * email templates for HTML and plain text alternative * configurable amount of friends * support for including a user submitted message in the email * support for HTML as well as XML (nice for Flash integration) * server-side validation * erro...

Use the backbone-forms library https://github.com/powmedia/backbone-forms: a "Form framework for BackboneJS with nested forms, editable lists and validation"

Create backbone twitter bootstrap form views easily using helpers. Handle and display validation failures from rails.

This is a gem which allows you to build ActiveRecord objects from an Excel file with validations in your rails application.

validation error renderer for ajax request

This validator uses modern email validation with URI to handle the nuances of checking email throughout your application. Rather than customizing a bunch of random regex that you found on various stack overflow pages, this lets you include a single validator throughout your entire application. It...

A component to auto generate seed data with ActiveRecord using a set of predefined or custom rules respecting models validations

HTTP request signing and validation library with support for header signing and multiple backends.

Make hash-based object initialization easy! Provides hash_make method that can consider parameter name, type, default value, validation, and requiredd/not, according to the specification provided. Also, by default assigns by default to instance variable of same name as parameter.

Even Rails can't be trusted not to produce malformed xml sometimes. Add this Rack middleware to the stack while you run your tests and it will monitor the responses you send, infer the appropriate validations based on content type, and raise if they fail.

The Brazilian Tax ID (CPF) validation and formatting, more functions to come

The purpose of the builder object is to create a layer of abstraction between the controller and models in a Rails application. The builder is particularly useful for receiving complex post and put requests with multiple parameters, but is lightweight enough to use for simple writes when some fil...

Faraday middleware for validation by OpenAPI

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

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

Serialize models with validation errors to json-api errors.

Find models in database which violate Active Record validation rules. Invalid models may raise unexpected error when updated.

Used to validate a number is odd or even or palindrome

Simple DSL to validate params (and coerce them to the desired type) that fall outside of Rails' default parameter whitelisting and ActiveModel validations system. The common use cases are searching and sorting, whether from an HTML form or via a JSON API.