Little gem that take advantage of Roo gem and Rails ActiveModel validation methods to read and validate the content of a spreadsheet

This gem wraps the guards.js jQuery validation library as a Rails asset gem.

Make it easy to use handles (callsigns/monikers/usernames) in URLs, even if they might be blank. Provides sensible validations and a find_by_id_or_handle method.

Adds validations on URL attributes for ActiveRecord models. URL scheme will be checked and added before updating the database if necessary. A raw_attribute method will also be added to display the url without HTTP(S) scheme or trailing slash.

IbanValidation provides a simple ActiveModel::EachValidator for formally validating International Bank Account Numbers (IBAN). It is based on the IBANTools gem.

This gem is used for the email validation and basic string operation like left padding, right padding, center padding, to uppercase, to lower case and to capitalize

This gem provides immutability validation. This is different from `readonly: true` stuff because it sets the error.

rack-oidc-api provides a JWT validation middleware which automatically discovers the settings supported by a given OIDC provider, and validates the token against the published keys.

Use the ActiveRecord mimicking API to write into CM and enjoy all the benefits of callbacks, validations and permission checking

PIC is a pattern matching library, like regular expressions, based on Cobol edited pictures. It's advantage over regular expressions is it more concise syntax which geared specifically toward validation of user input.

iTunes In-App Purchase and Subscription Receipt Analysis and Validation

A Ruby Gem For Chinese Mainland Personal ID Card Validation

Normalize dry-validation and ActiveModel errors to the universal format

Logobox translates ICO of the company into appropriate logo url at logobox.cz\nIt can check that the logo is uploaded and make the ICO validation.

An ActiveModel validator that consolidates multiple password validations.

Gem for validating complex JSON payloads in a functional way

It's a simple tool that provides helper methods for credit card number validations using Luhn Algorithm.

Generates Rails models from the target database... magically! Validations and associations included.

This gem helps you to create real validation for email, not just a simple regex

A mail gem based validator for rails