Validation groups for ActiveRecord

Embedded documents in Mongoid can be really useful. However, when one of those embedded documents is invalid, Mongoid does not say which validation has failed. Instead of just saying that an embedded document is invalid, this gem modifies Mongoid behavior so it explicitly provides validation erro...

A collection of assertions for use with minitest and activerecord. Simplifies testing associations and validations by introspecting associations and validations for you models.

Formtastic extension that does client side form validation

Form real time validations for free on Rails applications

PrettyValidation generate validation modules from database schema

jQuery-Validation-Engine jquery plugin for rails project.

RELAX NG schema validation using Jing, a Java based RELAX NG validator that emits clear, detailed validation errors. ruby-jing validates XML documents by wrapping Jing's java command-line user interface.

Social Security Number (SSN) Validation

Easily track all the validation errors on your database so that you can analyse them.

Form validation for Rails with Dry-Validation

Localize error messages in dm-validations.

Log validation errors to the database for later inspection.

Realtime remote form input validations delivered via websockets

Validation errors for logging

A Rails model validation, my first gem, just a practice work

ActiveModel child model validations delegater.

Context Validations to Rails models

Extract validations from your database information

Validacity adds an extra layer of validation objects where all your validation logic can be moved to.