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Rails example for dry-transaction and dry-validation
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| # app/controllers/users_controller.rb | |
| class UsersController < ApplicationController | |
| def create | |
| Operations::User::Create.new.call(params[:user]) do |m| | |
| m.success do |user_response| | |
| render json: user_response | |
| end | |
| m.failure do |responce| | |
| render json: responce, status: :not_acceptable | |
| end | |
| end | |
| end | |
| end | |
| # app/operations/user/create.rb | |
| require 'dry/transaction' | |
| module Operations::User | |
| class Create | |
| include Dry::Transaction | |
| include Dry::Monads::List::Mixin | |
| VALIDATOR = Dry::Validation.Schema do | |
| required(:nickname).filled | |
| required(:email).filled | |
| required(:password).filled | |
| end | |
| ALLOW_PARAMS = ::User.column_names.freeze | |
| DENY_PARAMS = %i[id].freeze | |
| step :validate | |
| step :clean | |
| try :persist, catch: StandardError | |
| tee :log_data | |
| def validate(user) | |
| result = VALIDATOR.call(user) | |
| result.success? ? Right(result) : Left(result.errors) | |
| end | |
| def clean(user) | |
| Right(user.output.select! { |k, _v| ALLOW_PARAMS.include? k }.permit!.except(*DENY_PARAMS)) | |
| end | |
| def persist(user) | |
| ::User.create(user) | |
| end | |
| def log_data(user) | |
| Rails.logger.info user.inspect | |
| end | |
| end | |
| end |
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