Ashmont

Ashmont is a set of classes that make it easier to use Braintree payment processing in a Rails application.

Ashmont attempts to make the following tasks easier:

• Processing error messages from Braintree and using them in the ActiveModel API
• Delegating and caching relevant information in a model backed by a Braintree recurring subscription
• Delegating and caching relevant information in a model backed by a Braintree customer with a credit card
• Determining what actions are necessary to handle a form update, such as updating a credit card, switching subscription plans, or retrying failed subscription transactions

Ashmont is still an early work in progress and the API may change dramatically with each release.

In your Gemfile:

gem "ashmont"

If you have an account with Braintree with multiple merchant accounts you'll want to configure the merchant account for this application:

Ashmont.merchant_account_id = 'your merchant account id'

Ashmont converts billing dates from Braintree into TimeWithZone instances to avoid time zone mishaps. You'll want to configure Ashmont with the correct timezone so that billing dates end up on the correct day.

Ashmont.merchant_account_time_zone = 'Eastern Time (US & Canada)'

In order to process payments with Braintree, you'll want to store customer and subscription tokens locally. You'll also need to store the billing status next billing date in order to synchronize account status with Braintree.

create_table "users" do |t|
  t.string   "customer_token"
  t.string   "subscription_token"
  t.datetime "next_billing_date"
  t.string   "subscription_status"
end

Here's a simple example for creating and updating a subscribed customer:

class User < ActiveRecord::Base
  before_create :create_customer
  after_destroy :destroy_customer
  memoize :customer

  def past_due?
    customer.past_due?
  end

  def save_customer(attributes)
    customer.save(attributes)
  end

  private

  def create_customer
    save_customer(:email => email)
    if customer.save(:email => email)
      self.customer_token = customer.token
      self.subscription_token = customer.subscription_token
      self.next_billing_date = customer.next_billing_date
      self.subscription_status = customer.status
      true
    else
      copy_errors customer.errors
      false
    end
  end

  def destroy_customer
    customer.delete
  end

  def copy_errors(source_errors)
    source_errors.to_hash.each do |attribute, messages|
      errors.set(attribute, messages)
    end
  end

  def customer
    Ashmont::SubscribedCustomer.new(
      Ashmont::Customer.new(customer_token),
      Ashmont::Subscription.new(subscription_token, :status => subscription_status)
    )
  end
end

user = User.new(params[:user])
user.save_customer(params[:customer])

The above save_customer method will accept attributes related to subscriptions, customers, and credit cards.

We recommend testing your applications using the fake_braintree library, which allows applications to use the real Braintree API without actually hitting Braintree's servers during automated tests.

Ashmont is Copyright © 2011-2013 thoughtbot, inc. It is free software, and may be redistributed under the terms specified in the LICENSE file.