def update
    form = choose_form
    if form.validate(params_type)
      form.save
      redirect_to action: :edit
    else
      render :edit
    end
end

class Users::ProfilesController < ApplicationController
  before_action :authenticate_user!
  before_action :set_user

  def billing_form
    address = @user.billing_address || Address.new
    AddressForm.new(address)
  end

  def shipping_form
    address = @user.shipping_address || Address.new
    AddressForm.new(address)
  end

  def edit
    #сюдя приходят предзаполненные данные
    @billing_address ||= billing_form
    @shipping_address ||= shipping_form
  end

  #Если не разбивать на 2 метода при валидации ошибка -
  #First argument in form cannot contain nil or be empty
  #= form_for @billing_address, as: :billing, url: {action: 'update'} do |f|

  def update
    if params[:billing]
      update_billing
    else
      update_shipping
    end
  end

  def update_billing
    @billing_address = choose_form
    if @billing_address.validate(params_type)
      @billing_address.save
      redirect_to action: :edit
    else
      @shipping_address ||= shipping_form
      render :edit
    end
  end

  def update_shipping
    @shipping_address = choose_form
    if @shipping_address.validate(params_type)
      @shipping_address.save
      redirect_to action: :edit
    else
      @billing_address ||= billing_form
      render :edit
    end
  end

  def create
    form = AddressForm.new(Address.new)
    if form.validate(params_type)
      form.save
      assign_address(form)
      @user.save
      redirect_to action: :edit
    else
      render :edit
    end
  end

  def update_password
    @user = User.find(current_user.id)
    if @user.update_with_password(profile_params)
      sign_in @user, :bypass => true
      redirect_to root_path
    else
      render 'edit'
    end
  end

  private
  def choose_form
    billing? ? billing_form : shipping_form
  end

  def assign_address(form)
    billing? ? @user.billing_address = form.model : @user.shipping_address = form.model
  end

  def billing?
    params[:billing].present?
  end

  def params_type
    params[billing? ? :billing : :shipping]
  end

  def profile_params
    params.require(:user).
        permit(:email, :password, :password_confirmation, :current_password)
  end

  def set_user
    @user = current_user
  end
end

class AddressForm < Reform::Form

  property :first_name
  property :last_name
  property :address
  property :city
  property :country_id
  property :zipcode
  property :phone

  validates :first_name, :last_name, :address, :zipcode, :city, :phone, presence: true
end

.row
  .col-md-6
    = form_for @billing_address, as: :billing, url: {action: 'update'} do |f|
      %h3= t('checkout.billing_address')
      %hr.style3
      = render 'static/error_messages', target: @billing_address
      = render 'address/form', f: f
      =  f.submit t('page.save_button'), class: 'btn btn-primary'

  .col-md-6
    = form_for @shipping_address, as: :shipping, url: {action: 'update'} do |f|
      %h3= t('checkout.shipping_address')
      %hr.style3
      = render 'static/error_messages', target: @shipping_address
      = render 'address/form', f: f
      =  f.submit t('page.save_button'), class: 'btn btn-primary'