A toolkit for building modeling frameworks like Active Record. Rich support for attributes, callbacks, validations, serialization, internationalization, and testing.

Databases on Rails. Build a persistent domain model by mapping database tables to Ruby classes. Strong conventions for associations, validations, aggregations, migrations, and testing come baked-in.

This is a Domain Name manipulation library for Ruby. It can also be used for cookie domain validation based on the Public Suffix List.

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.

Validation library

dry-schema provides a DSL for defining schemas with keys and rules that should be applied to values. It supports coercion, input sanitization, custom types and localized error messages (with or without I18n gem). It's also used as the schema engine in dry-validation.

xlsx spreadsheet generation with charts, images, automated column width, customizable styles and full schema validation. Axlsx helps you create beautiful Office Open XML Spreadsheet documents ( Excel, Google Spreadsheets, Numbers, LibreOffice) without having to understand the entire ECMA spec...

Google libphonenumber library was taken as a basis for this gem. Gem uses its data file for validations and number formatting.

Client Side Validations made easy for your Rails 6.1, 7.x, and 8.0 applications

Client Side Validations

Client Side Validations

Rack::Cache is suitable as a quick drop-in component to enable HTTP caching for Rack-based applications that produce freshness (expires, cache-control) and/or validation (last-modified, etag) information.

Validations for Active Storage (presence)

ActiveModel Validation for email

xlsx spreadsheet generation with charts, images, automated column width, customizable styles and full schema validation. Axlsx helps you create beautiful Office Open XML Spreadsheet documents (Excel, Google Spreadsheets, Numbers, LibreOffice) without having to understand the entire ECMA specifica...

Adds validation methods to ActiveModel for validating dates and times. Works with multiple ORMS.

Enable validation to hidden element using ClientSideValidations.

Adds basic reflection support to ActiveRecord validations

Scope ActiveModel validations

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.