This package provides integration with the payment gateway, DataCash. It is designed to integrate seamlessly with the e-commerce framework django-oscar but can be used without using oscar.
View the continuous integration status.
From PyPi:
pip install django-oscar-datacash
or from Github:
pip install git+git://github.com/tangentlabs/django-oscar-datacash.git#egg=django-oscar-datacash
Add 'datacash'
to INSTALLED_APPS
and run:
./manage.py migrate datacash
to create the appropriate database tables.
Edit your settings.py
to set the following settings:
DATACASH_HOST = 'testserver.datacash.com'
DATACASH_CLIENT = '...'
DATACASH_PASSWORD = '...'
DATACASH_CURRENCY = 'GBP'
There are other settings available (see below). Obviously, you'll need to specify different settings in your test environment as opposed to your production environment.
You'll need to use a subclass of oscar.apps.checkout.views.PaymentDetailsView
within your own checkout views. See oscar's documentation on how to create a local version of the checkout app.
Override the handle_payment
method (which is blank by default) and add your integration code. An example integration might look like:
# myshop.checkout.views
from django.conf import settings
from oscar.apps.checkout.views import PaymentDetails as OscarPaymentDetails
from oscar.apps.payment.utils import Bankcard
from oscar.apps.payment.forms import BankcardForm
from datacash.facade import Facade
from datacash import DATACASH
...
class PaymentDetailsView(OscarPaymentDetails):
def get_context_data(self):
...
# Render a bankcard form
ctx['bankcard_form'] = BankcardForm()
...
return ctx
def post(self, request, *args, **kwargs):
# Check bankcard form is valid
form = BankcardForm(request.POST)
if not form.is_valid():
ctx = self.get_context_data(**kwargs)
ctx['bankcard_form'] = form
return self.render_to_response(ctx)
kwargs['bankcard'] = form.get_bankcard_obj()
super(PaymentDetailsView, self).post(request, *args, **kwargs)
def handle_payment(self, order_number, total, **kwargs):
# Make request to DataCash - if there any problems (eg bankcard
# not valid / request refused by bank) then an exception would be
# raised ahd handled) within oscar's PaymentDetails view.
bankcard = kwargs['bankcard']
datacash_ref = Facade().pre_authorise(order_number, total, bankcard)
# Request was successful - record the "payment source". As this
# request was a 'pre-auth', we set the 'amount_allocated' - if we had
# performed an 'auth' request, then we woudl set 'amount_debited'.
source_type,_ = SourceType.objects.get_or_create(name=DATACASH)
source = Source(source_type=source_type,
currency=settings.DATACASH_CURRENCY,
amount_allocated=total,
reference=datacash_ref)
self.add_payment_source(source)
Oscar's view will handle the various exceptions that can get raised. See DataCash's documentation for further details on the various processing models that are available.
Oscar also has a billing address form that can be used to collect billing address information to submit to DataCash. This is only required if your merchant account has Cv2Avs enabled.
There are two key components:
The class datacash.gateway.Gateway
provides fine-grained access to the various DataCash APIs, which involve constructing XML requests and decoding XML responses. All calls return a datacash.gateway.Response
instance which provides dictionary-like access to the attributes of the response.
Example calls:
from decimal import Decimal as D
from datacash.gateway import Gateway
gateway = Gateway()
# Single stage processing
response = gateway.auth(amount=D('100.00'), currency='GBP',
merchant_reference='AA_1234',
card_number='4500203021916406',
expiry_date='10/14',
ccv='345')
response = gateway.refund(amount=D('100.00'), currency='GBP',
merchant_reference='AA_1234',
card_number='4500203021916406',
expiry_date='10/14',
ccv='345')
# Two-stage processing (using pre-registered card)
response = gateway.pre(amount=D('50.00'), currency='GBP',
previous_txn_reference='3000000088888888')
response = gateway.fulfill(amount=D('50.00'), currency='GBP',
txn_reference=response['datacash_reference'])
The gateway object know nothing of Oscar's classes and can be used in a stand-alone manner.
The class datacash.facade.Facade
wraps the above gateway object and provides a less granular API, as well as saving instances of datacash.models.OrderTransaction
to provide an audit trail for Datacash activity.
DATACASH_HOST
- Host of DataCash serverDATACASH_CLIENT
- UsernameDATACASH_PASSWORD
- PasswordDATACASH_CURRENCY
- Currency to use for transactionsDATACASH_USE_CV2AVS
- Whether to pass CV2AVS dataDATACASH_CAPTURE_METHOD
- The 'capture method' to use. Defaults to 'ecomm'.
To work on django-oscar-datacash
, clone the repo, set up a virtualenv and install in develop mode:
python setup.py develop
then install the testing dependencies:
pip install -r requirements.txt
The test suite can then be run using:
./run_tests.py
- Added admin.py
- Added travis.ci support
- Fixed bug with currency in refund transactions
- Fixed issue with submitting currency attribute for historic transactions