A library for making it extremely fast for Rails developers to set up and save ActiveRecord instances when writing test cases. It aims to: * meet all your validations automatically * only make you specify the attributes you care about * give you a rich set of features so you can specify associa...

DB constraints in migrations similiar to ActiveRecord validations. Core classes

Postgresql constraints in migrations similiar to ActiveRecord validations

Validate your ActiveRecord models on the client, showing their error and success messages by providing a validation controller.

Provides more advanced and flexible 'if then then that' style conditional validation. Validate fields based on the values of other fields in your model.

Use Turnstile by Cloudflare to perform captcha validation in your Rails app

Parameter whitelisting for Sinatra. Provides validation, defaults, and post-processing.

AddressValidate is a ruby wrapper for integrating with the USPS address validation api.

A library for setting up model validations, such as in ActiveRecord.

Data structures, validation, coercion and processing toolkit for Ruby

Rails Form Builder supports Client-side validation using jQuery BootstrapValidator plugin. https://github.com/nghuuphuoc/bootstrapvalidator

Easy client side validation for your ActiveRecord models

It provides validation of URIs (URLs) to ActiveModel records and ActionControllers in Rails 3.

A Rails plugin that allows validation on partially completed Active Record models (useful in wizards that incrementally build a model).

DataValidator has almost active_recorde validation methods.

It validates request params outside your controller logic in order to get a clean and nice code, and also helping with the documentation of the operations.

JSON schema validation for Rails

Explicit parameters validation and casting for Rails APIs

Validation for serialized model objects

Like Active Record's validation feature, but for destroying models