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...

A small and efficient validation library for Rails and anything that uses Ruby.

Automatically includes Modules from app/concerns/<module_with_concerns>/<concern>.rb into <module_with_concerns> to ease monkey-patching associations and validations on ActiveRecord::Base descendents from other gems when layering schemas.

Config. Defined as a class. Used as an instance. Support for inheritance and composition. Lazy instantiation. Thread-safe. Command-style DSL. Validation layer. Support for YAML, TOML, JSON, __END__, ENV. Extremely simple to define. Extremely simple to use.

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

A ruby gem for validating credit card numbers

SmartProperties are a more flexible and feature-rich alternative to traditional Ruby accessors. They provide support for input conversion, input validation, specifying default values and presence checking.

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

Phone number parsing, validation and formatting

Declarative parameter definition and validation for Rails

Simple model and validation mixins for RubyMotion

DecoLite is a little gem that allows you to use the provided DecoLite::Model class to dynamically create Decorator class objects. Use the DecoLite::Model class directly, or inherit from the DecoLite::Model class to create your own unique subclasses with custom functionality. DecoL...

StripAttributes automatically strips all ActiveRecord model attributes of leading and trailing whitespace before validation. If the attribute is blank, it strips the value to nil.

Assorted Rails 5.x-7.x validators: Array, Email, Existence, Grandparent, Hash keys, Hash values, Hostname, IP address, Ordering, URL, Write Once

Signed Message Authentication and Authorization with Key validation

Validate commonly used attributes easily with ActiveValidation.

Add a validation filter to your controller.

Provides a simple way to define a configuration with validation

Library for performing validations on DM models and pure Ruby object

Common Rails validations wrapped in a gem.