UUIDParameter handles a :uuid column and validation for any model.

Signed Message Authentication and Authorization with Key validation

The lightest of ORMs excluding magic such as properties, primary keys, associations, validations.

Strip / preprocess selected Active Record / Object attributes by creating custom setter through module prepending. Work with any Object in ruby and still allow custom setter to be defined inside the class. For exemple, can lowercase an email field during attribute setting for ActiveR...

Simple, powerful, and constraint-based validation

Run OCLint validation with oclint-json-compilation-database and fastlane :dart: :rocket:

Help to format strings in Rails before validation of the Model.

Provides a simple way to define a configuration with validation

Tools to help validate web pages. Gathers validation results from multiple sources, providing a single interface for both requests and responses.

This gem will take care of scopes, validations and normalization

Instead of scattering validations, strong parameters, and business rules across controllers and models, changesets give you one clear interface for handling data before it touches the database.

validate-response is a gem for bringing error messages from one or more ActiveRecord objects to the unified structure & highlight validation errors in forms (ajax supported).

Failfast mode for ActiveModel::EachValidator

mydry is a rails generator that enables you to work in a drier way, using the information you already provided in the migration to create your models, for example all the non nulls, uniques, numerics and relations defined in the database are already defined in the model with the corresponding val...

Rails' default update_attributes behavior is that when any validation fails, none of the data gets saved. However, in some instances this is not the most ideal behavior. If you import partial data which users then have the task of completing, not saving partially completed forms can create a real...

Telephone number validation based on RFC3966

CivilService provides a base class for your service objects. With CivilService, you can use ActiveModel validations to do pre-flight checks before the service runs, and create your own result object classes to capture the results of complex operations.

Dynamic uniqueness validator to validation two fields before save in db.

Parameter validation extension for Sinatra

Call method_contraints! with the param name and constraint to enforce validation on it