my horrible awful subscription solution

new.html.erb

<h1>Select a plan</h1>

<div class="row">
  <%= form_for @subscription, url: user_subscriptions_path, method: :post, html: { class: 'form-horizontal' } do %>


  <div class="col-sm-4">
    <%= hidden_field_tag :stripe_card_token %>
    <div class="form-group">
      <%= label_tag "Premium" %>
      <%= radio_button_tag :plan_id, @premium_plan.id, false %>
    </div>
    <div class="form-group">
      <%= label_tag :card_number, "Credit Card Number" %>
      <%= text_field_tag :card_number, nil, name: nil %>
    </div>
    <div class="form-group">
      <%= label_tag :card_code, "Security Code on Card (CVV)" %>
      <%= text_field_tag :card_code, nil, name: nil %>
    </div>
    <div class="form-group">
      <%= label_tag :card_month, "Card Expiration" %>
      <%= select_month nil, {add_month_numbers_true: true}, {name: nil, id: "card_month"}%>
      <%= select_year nil, {start_year: Date.today.year, end_year: Date.today.year+15}, {name: nil, id: "card_year"}%>
    </div>
    <div id="stripe_error">
      <noscript>JavaScript is not enabled and is required for this form. First enable it in your web browser settings.</noscript>
    </div>
    <div class="row">
    <%= submit_tag 'Choose Plan' %>
    </div>
  </div>
</div>
  <% end %>

plan.rb

class Plan < ActiveRecord::Base
  attr_accessible :name, :price

  has_many :subscriptions
end

seeds.rb

Plan.create!(name: "Free", price: 0)
Plan.create!(name: "Premium", price: 5)

subscription.rb

class Subscription < ActiveRecord::Base
  belongs_to :plan
  belongs_to :user
  
  attr_accessible :plan_id, :stripe_customer_token
  attr_accessor :stripe_card_token

  validates_presence_of :plan_id
  # validates_presence_of :stripe_card_token

  def save_with_payment
    if valid?
      customer = Stripe::Customer.create(description: user.email, plan: plan_id, card: stripe_card_token )
      self.stripe_customer_token = customer.id
      save!
    end
  rescue Stripe::InvalidRequestError => e
    logger.error "Stripe error while creating customer: #{e.message}"
    errors.add :base, "There was a problem with your credit card."
  end
end

subscriptions.js.coffee

# Place all the behaviors and hooks related to the matching controller here.
# All this logic will automatically be available in application.js.
# You can use CoffeeScript in this file: http://jashkenas.github.com/coffee-script/
jQuery ->
  Stripe.setPublishableKey($('meta[name="stripe-key"]').attr('content'))
  subscription.setupForm()

subscription =
  setupForm: ->
    $('#new_subscription').submit ->
      $('input[type=submit]').prop('disabled', true)
      subscription.processCard()
      false

  processCard: ->
    card =
      number: $('#card_number').val()
      cvc: $('#card_code').val()
      expMonth: $('#card_month').val()
      expYear: $('#card_year').val()

    Stripe.createToken(card, subscription.handleStripeResponse)

  handleStripeResponse: (status, response) ->
    if status == 200
      $('#stripe_card_token').val(response.id)
      $('#new_subscription')[0].submit()
    else
      $('#stripe_error').text(response.error.message)
      $('input[type=submit]').prop('disabled', false)

subscriptions_controller.rb

class SubscriptionsController < ApplicationController
  before_filter :authenticate_user! # TODO: let user know they still need to confirm their account
  before_filter :setup

def new
    @subscription = current_user.build_subscription
  end

  def create
    @plan_id = params[:plan_id]
    @subscription = current_user.create_subscription(plan_id: @plan_id)
    if @subscription.save_with_payment
      flash[:success] = "You're signed up with the #{@subscription.plan.name} plan!"
      redirect_to root_path
    else
      flash[:notice] = "There was an error."
      render :new
    end
  end

  private

  def setup
    @plans = Plan.all

    @plans.each do |plan|
      if plan.id == 1
        @free_plan = plan
      else
        @premium_plan = plan
      end
    end
    #binding.pry
  end

end

user.rb

class User < ActiveRecord::Base
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :confirmable, :validatable

  # Setup accessible (or protected) attributes for your model
  attr_accessible :username, :email, :password, :password_confirmation, :remember_me, :subscription, :role #actually don't need role
  
  has_many :wikis
  has_many :wiki_collaborations
  has_many :shared_wikis, through: :wiki_collaborations, source: :wiki
  has_one :subscription

end