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

Bare-bones minimum slugs. No validations or versioning.

Advanced ActiveModel email validation with MX lookups, domain blacklisting and disposable email blocking

Gem for validation of email

Rspec model tests only comes with one line: 'pending "add some examples to (or delete) #{__FILE__}"'. This gem seeks to populate the model spec with basic tests like validations, relationships, etc..., and then some.

validate if a string is right email format

This gem will use ActiveRecord’s existing validates_format#presence#uniqueness_of method to check whether the email parameter has a valid format, is present and is unique

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.

Reliable contract definition, data validation, and type checking for Ruby.

Description of SimplePhoneValidation.

Dependency-free object validation library for Ruby 1.8.7+

This acts_as extension implements a system label and a friendly label on a class and centralizes the logic for performing validations and accessing items by system label.

A minimalist approach to managing object state, perhaps best described as "an enum with guard rails." Designed to work with `ActiveRecord` and `ActiveModel` classes, or anywhere where Rails validations are used.

Mutations gem interface implemented with `dry-rb`’s validation schemas.

Used to validate a number is odd or even or palindrome

Dr Nic's Magic Models - Invisible validations, assocations and Active Record models themselves!

Ruby gem that mimics AWS SQS Extended Client with features like S3 offloading, compression, cleanup, validation, and logging.

Official Ruby SDK for the Phone Number Validation & Formatter API by GenderAPI.io. Features: - Validate phone numbers from 240+ countries - Format numbers to E.164 or national format - Detect number type (mobile, landline, VoIP, etc.) - Retrieve region, area code, and co...

A library that sucks... validation errors into an accumulator.

Using this gem you can validate an XML document using a ISO Schematron validation file