An api to run sequential checks like 'ActiveModel::Validations' do, but with generic messages instead of errors. See more info at https://www.rubydoc.info/gems/verifly/0.3.1.0

Password hashing and validation using OpenSSL::PKCS5::pbkdf2_hmac for the hash and SecureRandom.base64 for the salt. Digest defaults to SHA1, but can be set to any digest (eg SHA256) supported by your systems OpenSSL lib.

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.

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.

Configurator for Ruby Applications with some validation and sugars.

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.

A runtime validation configuration DSL

Limitable scans your ActiveRecord database schema for column size limits and defines corresponding model validations so that you don't have to.

Add address fields to a DataMapper model. This includes optional validations, and additional DM types for ZipCode and PhoneNumber.

Simple way to do validations more clear :)

Epic validator, wraps validation for HTML, JavaScript and CSS.

Fast indifferent-access JSON settings framework, validation included.

JsonValidation validates JSON according to a JSON Schema.

This gem allows you to create dynamic classes (models) based on a JSON Schema, providing validations and being compliant with ActiveModel.

Lightweight gem that utilizes Rails server-side model validations to display client-side error messages for Ajax form submissions.

JsonColumn is a simple HashWithIndifferentAccess with a ._schema method. It makes it easier to deal with json, jsonb postgresql column. It provide validation with josn-schema

ActiveModel validation against duplicating records.

JAXP based XML Validation

ActiveModel Validation for CSS

Validations for Non Active Record Models