Client Side Validations for Rails 2.x and 3.x

SchemaValidations extends ActiveRecord to automatically create validations by inspecting the database schema. This makes your models more DRY as you no longer need to duplicate NOT NULL, unique, numeric and varchar constraints on the model level.

A ruby gem for validating credit card numbers

Adds before_validation callback, which applies necessary function to attributes. There are some derivatives: squish_before_validation_for, downcase_before_validation_for, upcase_before_validation_for.

A Validation framework for creating validation profiles, allowing for the separation & reuse of validation logic from the object being validated.

"sinatra-validation is a gem to define parameter validation with dry-validation"

Enum Attributes Validation provides validation functionality for enum attributes in models.

An implementation of the Command Pattern for Ruby with ActiveModel::Validations inspired by the interactor gem. Rich support for attributes, callbacks, and validations, and thread safe performance methods.

Writing specs for complex validations is annoying. AcceptValuesFor makes iteasy to test your validations with real world values, asserting which valuesshould be accepted by your model and which should not.

HTML Validation lets you validate html locally. Lets you build html validation into your test suite, but break the rules if you must.

isbn_validation adds an isbn validation routine to active record models.

Define, enforce, and handle violations of validation rules for Chef node attributes. This gem provides the validation engine, and can be used outside of a convergence run; a cookbook (attribute-validator) is available to perform validation during a chef run, at compile or converge time.

This gem allows similar ActiveRecord validates_* commands to be grouped together in blocks and pruned of repeated parameters. How often have you had a block of validation commands in an ActiveRecord object that are repeated, especially :id or :unless options? Does this look familiar? validat...

Validations mixin for Ruby objects and support for Hanami

Provides validation and additional data about SPDX licenses and identifiers

CareBert analyzes the current items of your database and performs differing validation and integrity tests. Currently it supports following checks: \n - Table Integrity => check each single model-instance of all available tables can be loaded \n - Model Validation => triggers the validation...

This gem resolves basically two problems. --- 1. MySQL for strings(VARCHAR(255)) by default has limit 255 characters. And when developer left this attribute without any length validation, then it's possible to face with situation when user unintentionally or intentionally will p...

Instead of Rails translating validation errors automatically to current locale, validation errors are returned as error meta hashes easily embedded in API error responses and translated in the frontend.

This gem provides real time validations for forms. All validations follow the best principles of UI and UX

ActiveRecord/ActiveModel validation extension which enables attributes validation.