V ALIDATIONS IN Ruby Krzysztof W a wer 23.03.2016 TRUG 

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V ALIDATION ??? 

Ruby on rails ACTIVE MODEL & ACTIVE RECORD Active Model Active Record 

ACTIVE MODEL V ALIDATIONS • acceptance • confirmation • exclusion • format • inclusion • length • numericality • presence • uniqueness* 

UNIQUENESS V ALIDATION [email protected] exists ? [email protected] exists ? Email doesn’t exist Email doesn’t exist Create [email protected] Create [email protected] Created! Created! 1 2 

UNIQUENESS V ALIDATION 

UNIQUENESS V ALIDATION [email protected] exists ? [email protected] exists ? Email doesn’t exist Email doesn’t exist Create [email protected] Create [email protected] Created! ActiveRecord::RecordNotUnique 1 2 

Ruby on Rails • Strong Parameters http://edgeguides.rubyonrails.org/action_controller_overview.html#strong-parameters 

STRONG PARAMETERS { name: „John”, surname: „Doe” } { name: „John” } 

STRONG PARAMETERS { name: „John”, surname: „Doe” } ActionController::UnpermittedParameters: found unpermitted keys: surname ActionController::Parameters.action_on_unpermitted_parameters = :raise 

HTTP Requests GET POST GET, POST (JSON) String String String Integer … 

HANAMI http://hanamirb.org https://github.com/hanami •hanami-controller •HANAMI-MODEL •HANAMI-HELPERS •HANAMI-MAILER •HANAMI-VIEW •HANAMI-V ALIDATIONS •HANAMI-ASSETS •HANAMI-UTILS Luca Guidi 

HANAMI-V ALIDATIONS https://github.com/hanami/v alidations#v alidations •ACCEPTANCE •CONFIRMATION •EXCLUSION •INCLUSION •PRESENCE •FORMAT* •SIZE* •TYPE (Coercions) 

HANAMI-V ALIDATIONS • numericality V ALIDATION DoesN’t Exist • „The framework will treat as V alid any blank attributes, without PRESENCE, for both FORMAT and SIZE predicates.” 

DRY https://github.com/dry-rb •DRY-AUTO_INJECT •DRY-COMPONENT •DRY-CONFIGURABLE •DRY-CONSTRUCTOR •DRY-CONTAINER •DRY-EQUALIZER •DRY-INITALIZER •DRY-LOGIC •DRY-PIPELINE •DRY-TRANSACTION •DRY-TYPES •DRY-V ALIDATION 

DRY-V ALIDATION LATEST VERSION: 0.7.0 RELEASE DATE: 16.03.2016 http://dry-rb.org/gems/dry-v alidation/ 

DRY-V ALIDATION When to use? V ALIDATION OF: • form params • „GET” params • JSON params • Y AML DOCUMENTS • application configuration • replacement of ActiveRecord / ActiveModel::Validations • replacement of StrongParameters • … 

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