Why isnt the email being saved???

new.haml

%script{:src => "https://checkout.stripe.com/checkout.js"}
:javascript
  var handler = StripeCheckout.configure({
    key: '#{Rails.configuration.stripe[:publishable_key]}',
    locale: 'auto',
    name: 'foobar',
    billingAddress: true,
    description: 'Donation',
    token: function(token) {
      $('input#email').val(token.email);
      $('input#stripeToken').val(token.id);
      $('form').submit();
    }
  });

  $('#donateButton').on('click', function(e) {
    e.preventDefault();

    $('#error_explanation').html('');

    var amount = $('input#amount').val();
    amount = amount.replace(/\$/g, '').replace(/\,/g, '')

    amount = parseFloat(amount);

    if (isNaN(amount)) {
      $('#error_explanation').html('<p>Please enter a valid amount in USD ($).</p>');
    }
    else if (amount < 5.00) {
      $('#error_explanation').html('<p>Donation amount must be at least $5.</p>');
    }
    else {
      amount = amount * 100; // Needs to be an integer!
      handler.open({
        amount: Math.round(amount)
      })
    }
  });

  $(window).on('popstate', function() {
    handler.close();
  });

  $(".donationAmount").click(function(e){
    e.preventDefault();
    da = $(this).data("amount")
    $("#amount").val(da)

  })

post.rb

 #<Stripe::Customer:0x3fd1d3563594 id=abcdefghijklmnop> JSON: {
  "id": "abcdefghijklmnop",
  "object": "customer",
  "created": 1394731627,
  "livemode": false,
  "description": null,
  "email": null,
  "delinquent": false,
  "metadata": {},
  "sources": {"object":"list","data":[{"id":"card_1234567890ABCDEFghijklmn","object":"card","address_city":null,"address_country":null,"address_line1":null,"address_line1_check":null,"address_line2":null,"address_state":null,"address_zip":null,"address_zip_check":null,"brand":"Visa","country":"US","customer":"abcdefghijklmnop","cvc_check":"pass","dynamic_last4":null,"exp_month":10,"exp_year":2016,"funding":"credit","last4":"4242","metadata":{},"name":null,"tokenization_method":null}],"has_more":false,"total_count":1,"url":"/v1/customers/abcdefghijklmnop/sources"},
  "subscriptions": {"object":"list","count":0,"url":"/v1/customers/abcdefghijklmnop/subscriptions","data":[]},
  "discount": null,
  "account_balance": 0,
  "currency": "usd",
  "default_source": "card_1234567890ABCDEFghijklmn"
}