form submit ajax spree rails

ajax_upload_spree.js

var $form = $("form.edit_product");
		var form_action = $form.attr("action");
		var product_name_id = form_action.split('/')[3];
		var api_url = window.location.protocol + "//" + window.location.host + '/api/';
		$form.submit(function (e, data) {
			e.preventDefault();
			$.ajax({
				url: form_action,
				dataType: "json",
				type: "post",
				method: "PUT",
				data: {
					product: {
						option_type_ids: $("#product_option_type_ids").val()
					},
					authenticity_token: $('[name=authenticity_token]').val()
				}
			}).fail(function (data) {
				console.log("FAIL");
			}).success(function (data) {
				console.log("SUCCESS");
				// TODO Tell the user that this action will override the changes that he has done
				start();
				//console.log(data);
			});
		});// Form Submit