ryenski

describe CommentCreator do
  it 'should persist record' do
    assert_difference 'Comment.count', +1 do
      CommentCreator.new(comment_params).call
    end
  end
end

ryenski

class SignupsController < ActionController::Base
  def create
    @signup = TenantCreator.new(signup_params)
    if @signup.call
      redirect_to welcome_url(account_id: @signup.tenant.subdomain, auth_token: @signup.user.auth_token)
    else
      flash.now[:error] = @signup.errors.full_messages.join(', ')
      render action: :index
    end
  end

ryenski

class TenantCreator
  def initialize(user_name, email, company_name)
    @tenant = Tenant.new(name: company_name)
    @user = @tenant.users.new(name: user_name, email: email)
  end

  def call
    if persist!
      SignupMailer.welcome(user).deliver_now
      AnalyticsTracker.new(tenant).call

ryenski

class MessageCreator
  # ...
  def call
    process!
    return result
  end

  private
  def process!
    if message.save

ryenski

class WidgetCreator
  # ...
  attr_reader :widget, :success, :errors
  def result
    OpenStruct.new(success?: !errors, errors: errors.try(:flatten), widget: widget)
  end
end

widget_creator = WidgetCreator.new(params).call
widget_creator.success?

ryenski

class UserCreator
  # ...
  # UserCreator.new(params).call
  def call
    do_the_work(args)
  end
  # Alternatively some people think this reads nicer:
  # UserCreateor.call(params)
  def self.call(*args)
    new(*args).call

ryenski

class UserCreator
  def initialize(params)
    @user = User.new(params)
  end
  private
  attr_reader :user
end

ryenski

class LeadMagnetsController < FormsController
  private
  def skope
    current_user.lead_magnets
  end

  def form_params
    params[:form] = params[:lead_magnet]
    params.require(:form).permit(permitted_params)
  end

ryenski

class FormsController < ApplicationController
  before_action :set_form, only: [:show, :edit, :update, :destroy, :embed, :customize]

  # GET /forms
  # GET /forms.json
  def index
    @forms = skope.newest_first
    respond_to do |format|
      format.html
      format.json { render json: @forms }

ryenski

class OptInsController < FormsController
  private
  def skope
    current_user.opt_ins
  end

  def form_params
    params[:form] = params[:opt_in]
    params.require(:form).permit(permitted_params)
  end