Plugs directly in the the Google's native C++ [libphonenumber](https://github.com/google/libphonenumber) for extemely _fast_ and _robust_ phone number parsing, validation, and formatting. On average, most methods are 40x t0 50x faster than other Ruby phone number libraries.

Validatable is a library for adding validations. Now compatible with Ruby 1.9.2+

rails-ai-context turns your running Rails app into the source of truth for AI coding assistants. Instead of guessing from training data or stale file reads, agents query 38 live tools (via MCP server or CLI) to get your actual schema, associations, routes, inherited filters, conventions, and test...

Callback Hell analyzes your Rails application models and provides useful insights on callbacks and validations defined

A custom validation for your Active Model that check if an array is included in another one

Model.validates { presence_of :name }

Schema-based validation and coercion for Ruby data structures, inspired by Prismatic/schema for Clojure.

CPF and CNPJ validations for ActiveModel and Rails

Validatable is a library for adding validations.

A Rails plugin that adds an ActiveRecord validation helper to do range and start/end date checking in.

Personnummer handles validation of Swedish personal identity numbers.

Keep your code DRY by inferring column validations from table properties! Automagically validate presence, length, numericality, inclusion and uniqueness of ActiveRecord backed columns.

Validate iTunes Transaction and Unified style receipts with local decoding and remote validation.

Swift code validation and lookup Ruby gem

Provide validation/generation for UPC/EAN/GTIN numbers

This library helps validate attributes to specific types in the same way that ActiveModel valiations work. Able to chain additional modifiers to each validation.

Handles application errors and model validations

ActiveModel validation that checks email addresses against a blacklist of trash-mail providers

Ruby gem for runtime data validation and monitoring using the contracts approach.

Opt-in validations for your ActiveRecord models based on your MySQL database constraints, including text field size, UTF-8 encoding issues, and NOT NULL constraints.