Digget makes creating search endpoints easier. It allows you to put some validations on incoming parameters and use these parameters to filter models.

Hash validation for 'options'-like methods.

Gem to remove previously set validations

Adds ActiveModel validation for domain format.

ActiveModel validations for domains with fully localization support.

This gem is part of the Deployment and Orchestration for Puppet or DOP for short. dop_common is a library for the parsing and validation of DOP plan files.

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

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.

It provides basic command line tools for simply defining things like cross validations, factorial experimental design and basic statistics. All of this can be run in a distributed manner.

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

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.

Formtastic's stock BooleanInput doesn't work with client_side_validations. This does.

Rails gem/plugin that implements an ActiveRecord validation helper called validates_as_date_time which validates U.S. dates, times, and date-times

This is a module for the Ruby language that defines a callback GEDCOM parser. It does not do any validation of a GEDCOM file, but, using application-defined callback hooks, can traverse any well-formed GEDCOM.

UPS address validation gem

Calls and parses various maps APIs for accurate address validation and geocoding

Array validations for Rails (e.g. Postgres jsonb columns)