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ActiveModel: Custom ValidationsRuby4,277EditValidate email, social profiles, urls, dates or post addresses and much more.
Date and time validation plugin for ActiveModel and Rails. Supports multiple ORMs and allows custom date/time formats.https://github.com/adzap/validates_timeliness
Data validation based on predicate logichttp://dry-rb.org/gems/dry-validation
Collection of ActiveModel/ActiveRecord validatorshttps://rubygems.org/gems/activevalidators
A simple, ORM agnostic, Ruby 1.9 compatible date validator for Rails 3, based on ActiveModel.http:// http://thoughts.codegram.com/date-validation-with-rails-3
Active Model Validations for Email using mail gemhttps://github.com/hallelujah/valid_email
Validate e-mail addreses against RFC 2822 and RFC 3696 with this Ruby on Rails plugin and gem.http://code.dunae.ca/validates_email_format_of.html
Validates european vat numbers. Standalone or as a ActiveModel validator.https://github.com/yolk/valvat
Gem for Rails 3 and 4, that helps validate overlaphttps://github.com/robinbortlik/validates_overlap
Add a description for this repo on pluginGeek or Github.https://github.com/kaize/validates
A Ruby gem to assist with collecting and formatting international addresseshttps://github.com/cainlevy/snail
Introspects your database string field maximum lengths and automatically defines length validations.https://github.com/rubiety/validates_lengths_from_database
Suite of macros and matchers to get your RSpec on steroids.https://github.com/tiagopog/smart_rspec
Allow the validation of uniqueness across multiple modelshttps://github.com/powershift/uniqueable
Validation of attributes that use masks in the form input.https://github.com/MarceloCajueiro/mask_validator
A simple Rails plugin which adds a validates_email class method to ActiveRecord::Base.https://github.com/Fingertips/validates_email-san
Adds support for validating the format/length of email addresseshttp://www.pluginaweek.org
validates_email is a Rails 3 plugin that validates email addresses against RFC 2822 and RFC 3696https://github.com/spectator/validates_email
Advanced E-mail address validation library in Rubyhttp://theshed.hezmatt.org/email-address-validator
Validates wether a Rails association belongs to the same ownerhttps://github.com/Arjeno/validates_belongs_to
A Rails plugin that adds validation sets to Active Recordhttp://fingertips.github.com
Validate associated models, and aggregate their errors onto the primary modelhttps://github.com/noahd1/also_validates
Validates Rails model belongs_to association existencehttps://github.com/perfectline/validates_existence
A PORO Validations library. Now.https://github.com/mbj/aequitas
Library for performing validations on DM models and pure Ruby objecthttp://datamapper.org/
ISBN Validation for ActiveRecord Modelshttps://github.com/zapnap/isbn_validation
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