A collection of Regular Expression validations

It will handle ajax validations.

An easy to use Ruby built-in type validations library.

Declare ActiveModel validations fluently

Awesome validation and object matching library

Rumale::ModelSelection provides model validation techniques, such as k-fold cross-validation, time series cross-validation, and grid search, with Rumale interface.

ActiveModel validation for email. Including MX lookup and disposable email deny list

RSpec matches for Mongoid models, including association and validation matchers.

ActiveRecord provides validations on app level but it won't guarantee the consistent. In some cases, like `validates_uniqueness_of` it executes additional SQL query to the database and that is not very efficient. The main goal of the gem is to provide compatibility between database constraints a...

Provide an easy way to check the consistency of the database constraints with the application validations.

Parameter Validation and Type Coercion for Rails

Phone number validation

Send e-mail straight from forms in Rails with I18n, validations, attachments and request information.

Integrate the jQuery Validation plugin into the Rails asset pipeline

RSpec matches for Mongoid models, including association and validation matchers

RSpec matches for Mongoid models, including association and validation matchers

RSpec matches for Mongoid models, including association and validation matchers

Phone number parsing, validation and formatting.

Useful to make forms and validations. It uses MaxMind database.

AutoStripAttributes helps to remove unnecessary whitespaces from ActiveRecord or ActiveModel attributes. It's good for removing accidental spaces from user inputs. It works by adding a before_validation hook to the record. It has option to set empty strings to nil or to remove extra spaces inside...