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

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

Dependency-free object validation library for Ruby 1.8.7+

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

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

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

A simple, localizable EachValidator for email address fields in ActiveRecord 3.0.

Ruby Library for the mailboxlayer API, a web service that email validation & verification, https://mailboxlayer.com/

Add state maps to Rails Enums for validation on transitions.

error_messages_for_helper provides a simple helper to show ActiveRecord validation errors (just like old helper error_messages_for for Rails-2.3.x).

ElasticSearch Queries, gem that allows elastic creation of complex ES queries, and end up in hashes. Validation enabled. Uses eapi gem)

LiveValidation integration with default Rails form helpers and validation methods.

100% exclusive message for any ActiveModel validation error.

FiletypeValidation is a Ruby gem for validating file content types.

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...

Builds forms with a standard template that has labels, hints, and validations

This gem allows model to have state, and based on that create wizard with step by step validations

This is an alpha version. Create a class implements from FluentValidator, then use rule_for method to register validators in its construction method.

To format validations made with typs.

Protect the foreign keys in your Rails models by checking the user_id of self against the user_id of all relations.