Create Rails active record style validation in your non-Rails app

Rulix lets you fold complex rulesets onto complex data structures; useful for validation, data sanitization, and mutation.

Input validation DSL and support classes for the Jet Toolkit.

We can validate CPF and CNPJ formats and verifying digits.

A clean, immutable Ruby interface for working with piece identifiers in PNN format. PNN provides a consistent and rule-agnostic notation for representing pieces in abstract strategy board games like chess, shogi, and xiangqi. Features include state modifiers for enhanced/diminished/intermediate p...

Validate commonly used attributes easily with ActiveValidation.

If you've gone through the trouble of linking your schema with proper foreign keys, defining associations in ActiveRecord feels like double work. ActiveSchema discovers the associations and validations that can be derived from the database schema.

Separate ActiveModel::Validations for warnings.

thai_qr_pay is a Ruby gem providing: - ASCII-numeric TLV parsing and encoding - EMVCo CRC-16/IBM-SDLC checksum computation and validation - Generators for PromptPay AnyID, PromptPay Bill Payment, TrueMoney, etc. - Validators for slip-verify and TrueMoney slip verify payloads - BOT barcode → EMVCo...

Use Ruby code to generate JSON schemas with intelligent defaults, validation, and versioning.

Gem Utilities for ISBN validation and Isbn Conversion

This validator uses modern email validation with URI to handle the nuances of checking email throughout your application. Rather than customizing a bunch of random regex that you found on various stack overflow pages, this lets you include a single validator throughout your entire application. It...

IBAN rails validator with iso-iban.

RSpec matches for Nobrainer models, including association and validation matchers.

Extend ActiveRecord uniqueness validations with via: :db option.

Provider-agnostic guardrails (PII redaction, schema validation) and evaluation/regression harness for LLM prompts and models.

JekyllFileWizard is a comprehensive gem designed to streamline the management and dynamic updating of Jekyll site structures. It automates the process of checking, creating, and updating various files in a Jekyll project, including HTML files, data files, and more. The gem offers features like dy...

As your Rails projects evolve and grow, your model validations tend to change as well. An unfortunate side effect of this evolution is that your table- backed ActiveRecord::Base descendants end up with rows that instantiate invalid model instances. ValidData generates a report for your Rails appl...

simple-cli-options is a small Ruby library for parsing command-line flags with validation and conversion. Define options with short/long forms, then parse ARGV and read values by name. This gem is currently in BETA; APIs may change in future releases.

A ActiveRecord plugin which removes leading and trailing whitespace of attributes before validation.