An ActiveModel validator that consolidates multiple password validations.

Gem for validating complex JSON payloads in a functional way

This gem helps you to create real validation for email, not just a simple regex

A high-level IO library that provides validation, type conversion, and more for command-line interfaces. HighLine also includes a complete menu system that can crank out anything from simple list selection to complete shells with just minutes of work.

This RubyGem allows you to prevent particular database fields from being changed after an Active Record object is created. A validation error occurs on updates if an attribute of a model object is different from its value in the database.

A Ruby on Rails library to help with mass database operations like insert, update, save, validations, etc (much faster than typical ActiveRecord Interactions

Merb plugin that provides a Form Builder that will wrap your bound fields with a field div, integrated with the model validation

Just a simple, ready to use interactor implementation with built in validation of input params

Store mixed numbers in an ActiveRecord model seamlessly with built-in validation.

Tiny plugin for MongoMapper to sanitize strings before validation.

In more complex workflows, multiple models that are related to each other need to be created at the same time. This toolkit allows to specifiy models that orchestrate persistence and validation actions of multiple models by nesting them into a so called orchestration model.

Does validations, associations, scopes, filters, pagination, counter cache, request cache, and nested queries. Using a YAML schema file, which supports default values, data types, and security levels for each key.

RSpec matches for Mongoid 4 models, including association and validation matchers

Hacks to support Mongoid remove field. Including associations and validations

MongoidNestedFields allows you to handle complex data structures inside one field in MongoDB. It also validates whole object graph on field validation

This gem allows you to download a file. However, it will also check to see if a MD5 file exists at the source and compare against the destination for validation

SQLite constraints in migrations similiar to ActiveRecord validations

ActiveModel-compliant form objects for rails app. Forms have data and behavior. Let them be the objects they want to be. Plus, get presentation- specific validation logic out of your models.

Make ActiveRecord Validation easier to share as Schema

Nested validations allow a parent's validity to include those of child attributes. Errors messages will be copied from the child attribute to the parent.