A high-level IO library that provides validation, type conversion, and more for command-line interfaces. HighLine also includes a complete menu system that can crank out anything from simple list selection to complete shells with just minutes of work.

Client side validation with parsley and simple_form.

Simple value object gem with straighforward type validation

Flags is a framework for Ruby which allows the definition of command-line flags, which are parsed in and can be accessed smartly from within your Ruby code. This framework allows for numerous different flag types, and takes care of the process of type conversion and flag validation (type and val...

Send e-mail straight from forms in Rails with I18n, validations, attachments and request information.

dry-schema provides a DSL for defining schemas with keys and rules that should be applied to values. It supports coercion, input sanitization, custom types and localized error messages (with or without I18n gem). It's also used as the schema engine in dry-validation.

RSpec matches for Mongoid models, including association and validation matchers

RSpec matches for Mongoid models, including association and validation matchers

RSpec matches for Mongoid models, including association and validation matchers

Contains commands, events, validations for Rails Disco. Commands are used to transport updates from Rails to the domain. Validations are used to validate commands in Rails and the domain. Events are created in the domain and processed in projections. Have a look at the rails...

RSpec matches for Mongoid models, including association and validation matchers.

Rack middleware for Weixin apps: message validation/parser/generator

TLSPretense provides a set of tools to test SSL/TLS certificate validation. It includes a library for generating certificates and a test framework for running tests against a client by intercepting client network traffic."

SA VAT number validation

Delegates validation between objects

A collection of various validators for Rails forms

Custom Ruby on Rails form builder that generates GOV.UK elements styled markup for form inputs, including error validation messages.

Validate graphql-ruby arguments easily with dry-validation

Token validation for distributed resource servers

Google libphonenumber library was taken as a basis for this gem. Gem uses its data file for validations and number formatting.