asdf.rb

## Controller
class RegistrationsController < ApplicationController
  before_action :set_registration, only: [:show, :edit, :update, :destroy]

  # GET /registrations
  def index
    @registrations = Registration.all

    authenticate_or_request_with_http_basic('Administration') do |username, password|
      username == 'admin' && password == 'password'

  end
  end

  # GET /registrations/1
  def show
  end

  # GET /registrations/new
  def new
    @registration = Registration.new
    @level = Level.find_by id: params["level_id"]
  end

  # POST /registrations
  def create
    @registration = Registration.new registration_params.merge(email: params['registration']['email'],
                                                               card_token: params['registration']['card_token'])
    raise "Please, check registration errors" unless @registration.valid?
    @registration.process_payment(params['registration']['email'], params['registration']['card_token'])
    @registration.save!
    redirect_to @registration, notice: 'Registration was successfully created.'
  end

  private
    def stripe_params
      params.permit :stripeEmail, :stripeToken
    end
    # Use callbacks to share common setup or constraints between actions.
    def set_registration
      @registration = Registration.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
  def registration_params
    params.require(:registration).permit(:level_id, :firstname, :lastname, :phone, :email, :card_token)
  end
end

## Model
class Registration < ActiveRecord::Base
  belongs_to :level

  def process_payment(email, card_token)
  
  customer = Stripe::Customer.create email: email,
                                       card: card_token
  
    Stripe::Charge.create customer: customer.id,
                          amount: level.price*100,
                          description: level.name,
                          currency: 'usd'

  end
end