On Mon, Jul 6, 2009 at 2:17 PM, Bob Waycott <[email protected]> wrote:
> Hey guys,
> Hopefully Chris & Bruce could shed a bit of light here. Our client is
> wanting us to explain the difference between Order Payments & Order Payment
> Authorizations as they show up in the admin.
>
> My guess at this is that an OrderPayment is saved every time checkout is
> completed; an OrderPaymentAuthorization is saved every time a gateway is
> used to process a payment.
>
> Am I anywhere close on this?
>
Yes, that's pretty close. I wrote this code, and I wanted to keep things
very clear, but I realize it isn't documented explicitly.
Here's how it works. Some payment gateways understand "AUTH/CAPTURE" as
separate steps. For example, Authorize.net can do this. That gateway has a
config option, allowing an immediate CAPTURE, or to instead split AUTH and
CAPTURE. In the latter
case, when a customer checks out, instead of making an OrderPayment,
we make an OrderAuthorization. Later, when the order is marked
"Shipped," the system automatically attempts to make the CAPTURE for
all pending authorizations
on that order. After the CAPTURE is complete, the OrderAuthorization object
is marked complete, and an OrderPayment object is created for the
successfully captured payment.
If you look at this Order method, you'll see that we are counting AUTHs as
counting toward amount paid, so that we can properly calculate whether we
are partially paid.
def _balance_paid(self):
payments = [p.amount for p in self.payments.all()]
if payments:
paid = reduce(operator.add, payments)
else:
paid = Decimal("0.0000000000")
return paid + self.authorized_remaining
Hopefully that makes things clearer.
---
Bruce Kroeze
http://gosatchmo.com
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