Interactor + Form Object + ActiveModel::Validation

CKAN CLI with built-in CSV file validation and CKAN API integration.

i18n address standardization and validation using Google's i18n address repo

Expose fully RESTful HTTP APIs including code-on-demand so client can intelligent present most appropriate UI element for each property & perform arbitrary, non-authorative, client-side validations before submitting data to the API server.

Integrated CfnDsl CloudFormation template generation pipeline that integrates cfn_nag, AWS template validation, and AWS template costing (where possible), and generated `aws cloudformation deploy` compatible parameters files

Model scope analyzes your Rails application models and provides some useful insights on callbacks and validations defined

RubyBHL is a simple but flexible request/response wrapper for the Biodiversity Heritage Libary API. It includes (some) validation for request formatting. It has excellent unit-test coverage.

Provides hash validation with pure text configuration that can be stored in db

Simple Ruby Service is a lightweight framework for creating Services and Service Objects (SOs) in Ruby. The framework makes Services and SOs look and feel like ActiveModels, complete with: 1. validations and robust error handling; 2. workflows and method chaining; and 3. consistent interfaces. Additionally, Simple Ruby Service Objects can stand in for Procs, wherever Procs are expected (via ducktyping).

Most web applications have a lot of before/after hooks that occur when working with objects: sending a welcome email on registration, incrementing/decrementing counter caches, trigger validation on remote web services. When implemented using callbacks, all these occur without the developer knowing about them. A simple change in one area of the code can have a huge impact somewhere else. Inspiration for this came from http://blog.teksol.info/2010/09/28/unintented-consequences-the-pitfalls-of-activerecord-callbacks.html and http://jamesgolick.com/2010/3/14/crazy-heretical-and-awesome-the-way-i-write-rails-apps.html

Ruby Cloud SDK wraps Aspose.Cells REST API so you could seamlessly integrate Microsoft Excel® spreadsheet generation, manipulation, conversion & inspection features into your own applications. Aspose.Cells Cloud for Ruby enables you to handle various aspects of Excel files, including cell data, styles, formulas, charts, pivot tables, data validation, comments, drawing objects, images, hyperlinks, and so on. Additionally, it supports operations such as splitting, merging, repairing, and converting to other compatible file formats.

Same as acts_as_state_machine but on multiple columns and with more strict validation, allow creation of complex events with parameters, used successfully on critical financial applications for quite a long time

Shoulda Matchmakers generates regression specs for existing ActiveRecord models and ActionController controllers using Shoulda Matchers. It generates specs for model validations, associations, nested attributes, enum definitions, attribute serialization, database columns and database indexes as well as controller REST routes, and before/after/around actions/filters. It can also generate FactoryGirl factories containing the minimum attributes required for the factory to create a valid object. Shoulda Matchmakers is based on the Regressor gem by Erwin Schens.

Data structure to hold validation and process errors