Get the power of ActiveRecord models, including validation, without having a table in the database.

Flatter transforms a deeply nested graph of ActiveModel-like objects to a single mapper object that handles all the nested attributes and has a very flexible behavior for handling validation, saving routines with a DRY approach.

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.

Set a schema, defaults, and validations for your json attributes

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

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.

Defines the skills cards data model and methods to validate whether given data matches this model.

A useful utility for transforming state that provides step sequencing, middleware, and validation.

Basically based on RFC 5322, with some additional validations so it works on almost all variety of systems.

Build associations & validations specs automatically with shoulda-matchers

Extend your Rails forms with character countdown fields easy with just setting validations to your models.

Adds a new validation for ActiveRecord, 'has_unpublished_password'

Need a simple, consistent way to create model instances and check validations in your ActiveRecord 3.1+ tests? Use the Modelizer. Just don't trust the docs, since lots changed in 5.x and I got lazy.

This gem allows to generate JsonSchema thanks to a Builder class or an ActiveRecord serialization class. It can be used in Rails 4, 5 or Ruby standalone projects. The output validation is done agains json-schema.

Automatically generate Grape params or Rails strong params from Dry::Validation contracts

Simple and powerful way to work with LLM structured outputs in Rails. Supports OpenAI and Anthropic with automatic validation, caching, and Rails integration.

Uses the power and familiarity of ActiveModel::Validations to validate hash structures. Designed for detecting and providing feedback on bad requests to your RESTful Web Service.

Provide validations from ActiveRecord schema information.

QAT Devel is a tool for executing common tasks in the development of QAT modules: - DoD metric validation - Code Coverage - Code Documentation - Code Quality - (more coming soon...)