Parameter Validation and Type Coercion for Rails

ActiveModel validation for email. Including MX lookup and disposable email blacklist

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

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

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.

Phone number validation

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...

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

CouchRest Model provides aditional features to the standard CouchRest Document class such as properties, view designs, associations, callbacks, typecasting and validations.

SimpleForm Plugin for ClientSideValidations

A ruby gem for validating credit card numbers

Integrate the jQuery Validation plugin into the Rails asset pipeline

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...

Provides validation and additional data about SPDX licenses and identifiers

Realtime remote form input validations delivered via websockets

Adds zipcode validation methods to ActiveModel considering different country zipcode formats.