Rails gem that implements an ActiveRecord validation helper called validates_as_postal_code which validates U.S. postal codes

Rails gem that implements an ActiveRecord validation helper called validates_as_phone_number which validates U.S. phone numbers

Guardrail captures validation errors from your Ruby on Rails application to help you identify and fix user experience issues. The GuardrailNotifier gem makes it easy to hook up your app to the Guardrail web service.

This RubyGem allows you to prevent particular database fields from being changed after an Active Record object is created. A validation error occurs on updates if an attribute of a model object is different from its value in the database.

Verify the existence of an email address.

Uidable is a module to add a uid(unique identifier) attribute in your model or class. With ActiveRecord, the presence and uniqueness validations are supported.

Provides a DSL for common validation formats like Date, Array, DateTime etc.

ReCaptcha implements view helpers to generate ReCaptcha code, with the noscript counterpart, required methods that interface with the HTTP API for captcha verification, a DSL to generate a before_filter and the code to implement AJAX captcha validation.

Manage markup close to home... right in the model! Caching, validation, etc

Zero-dependency Ruby utilities for: • checksum validation (modulus-11), • component decoding (category, office_code, district_code, sequence), • random valid ID generation, • human-readable category descriptions.

thai_qr_pay is a Ruby gem providing: - ASCII-numeric TLV parsing and encoding - EMVCo CRC-16/IBM-SDLC checksum computation and validation - Generators for PromptPay AnyID, PromptPay Bill Payment, TrueMoney, etc. - Validators for slip-verify and TrueMoney slip verify payloads - BOT barcode → EMVCo...

Use Ruby code to generate JSON schemas with intelligent defaults, validation, and versioning.

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...

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

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

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.