Associate Braintree PaymentMethod with an Address - ruby

Question

require 'braintree'
# set credentials
Braintree::Configuration.merchant_id = 'XXX'
Braintree::Configuration.public_key = 'YYY'
Braintree::Configuration.private_key = 'ZZZ'
Braintree::Configuration.environment = :sandbox
# see the raw messages going to and from the Braintree server
Braintree::Configuration.logger = Logger.new(STDERR)
Braintree::Configuration.logger.level = Logger::DEBUG
customer = Braintree::Customer.create!(first_name: 'John', last_name: 'Doe')
begin
address = Braintree::Address.create!(customer_id: customer.id, locality: 'London')
pmethod = Braintree::PaymentMethod.create(customer_id: customer.id, billing_address_id: address.id, payment_method_nonce: 'fake-valid-visa-nonce')
p pmethod
ensure
# always delete the Customer in order not to leave much rubbish
# behind the testing session
Braintree::Customer.delete(customer.id)
end
I create a Customer, than an Address for him. When I attempt to create a PaymentMethod, using a nonce representing a credit card, and provide a billing address (by means of an ID of the previously saved Address), the PaymentMethod is not saved and error result is returned. The p pmethod line prints
#<Braintree::ErrorResult params:{...} errors:<credit_card:[(91701) Cannot provide both a billing address and a billing address ID.]>>
The error message doesn't make sense, as I only provide billing address ID. I have also checked that the SDK doesn't e.g. forge an empty address and send it to the server together with the PaymentMethod data provided in my code.
Creating a PaymentMethod without billing address works, but I really want to specify one.

Answer 1

Full disclosure: I work at Braintree. If you have any further questions, feel free to contact support.
Bottom-line: At this time, you cannot test the billing_address_id with a test nonce, but it will work with a nonce generated for the sandbox from a Drop-in or Custom Integration at the client side.
This is a limitation of the testing API itself. When you submit one of the test nonces, it pre-populates with data that is commonly required for various checks. One of those pre-populated fields is that of billing_address=>zip_code which you can see if you do a vanilla payment method create with the fake nonce you are using. billing_address can be overwritten with whatever test values you want, but you can't undo it or zero it out.