Ruby Models + Services

creator.rb

class Phones::Creator
  attr_reader :phone_params
  
  delegate :contact, to: :phone
  
  def initialize(phone_params)
    @phone_params = phone_params
  end
  
  def call
    if phone.save
      set_main_phone
    end
    
    phone.persisted?
  end
  
  def phone
    @phone = Phone.new(phone_params)
  end
  
  private
  
  def set_main_phone
    if phone.main?
      Phones::MakeDefault.new(phone, contact).call
    end
  end
end

make_default.rb

class Phones::MakeDefault
  delegate :phones, to: :contact
  
  def initialize(contact, phone)
    @contact = contact
    @phone = phone
  end
  
  def call
    phones.where.not(id: phone.id).update(main: false)
  end
  
  private
  
  attr_reader :contact, :phone
end

phone.rb

class Phone < ApplicationRecord
  belongs_to :contact
end

phones_controller.rb

class PhonesController < ApplicationController
  def create
    @creator = Phones::Create.new(phone_params).call
    
    if @creator
      render json: { success: true, phone: @creator.phone }
    else
      render json: { success: false, errors: @creator.phone.errors }
    end
  end
  
  private
  
  def phone_params
    params.require(:phone).permit(:main, :number, :contact_id)
  end
end