The lightest of ORMs excluding magic such as properties, primary keys, associations, validations.

Strip / preprocess selected Active Record / Object attributes by creating custom setter through module prepending. Work with any Object in ruby and still allow custom setter to be defined inside the class. For exemple, can lowercase an email field during attribute setting for ActiveR...

Herbert makes development of JSON REST API servers ridiculously simple. It provides a set of useful helpers and conventions to speed up development. Input validation, logs and advanced AJAX support are baked in. Herbert is very lightweight and transparent, making it easy to use & modify.

The `handle_array_attribute` concern provides a flexible way to treat string attributes in a Rails model as arrays. This includes parsing strings based on configurable separators, optional spaces between elements, and optional maximum length validation for each element.

This is a simple validation gem

Provides a simple way to define a configuration with validation

Tools to help validate web pages. Gathers validation results from multiple sources, providing a single interface for both requests and responses.

This gem will take care of scopes, validations and normalization

Instead of scattering validations, strong parameters, and business rules across controllers and models, changesets give you one clear pipeline for handling data before it touches the database.

validate-response is a gem for bringing error messages from one or more ActiveRecord objects to the unified structure & highlight validation errors in forms (ajax supported).

Failfast mode for ActiveModel::EachValidator

This acts_as extension implements a system label and a friendly label on a class and centralizes the logic for performing validations and accessing items by system label.

A macro-style method that will automatically read the database contraints (null requirements, string length, etc) and enforce those at the model level to keep validation more DRY. Provides many options to customize how automatic it is and what columns it affects.

Telephone number validation based on RFC3966

CivilService provides a base class for your service objects. With CivilService, you can use ActiveModel validations to do pre-flight checks before the service runs, and create your own result object classes to capture the results of complex operations.

Dynamic uniqueness validator to validation two fields before save in db.

Parameter validation extension for Sinatra

Call method_contraints! with the param name and constraint to enforce validation on it

A Rails controller concern which makes it easy to encapsulate validation and processing of complex incoming data into command classes.

Adds an abstract EachValidator superclass that you can use to create localizable validations.