def get_rates(self, cart, contact):
from satchmo_store.shop.models import Config
error_ret = False, None, None
shop_details = Config.objects.get_current()
# always use production api keys for get_rates, you don't get charged
# anyways
cpa_kwargs = canada_post_api_kwargs(self.settings, production=True)
cpa = CanadaPostAPI(**cpa_kwargs)
# parcels is a list of (Parcel, pack(dimensions))
parcels, rest = self.make_parcels(cart)
if rest:
log.error("There's not boxes big enough for some of these "
"products: {}".format(rest))
return error_ret
log.debug("Calculated Parcels: [%s]", ",".join("({})".format(unicode(p))
for p in parcels))
origin = get_origin(shop_details)
destination = get_destination(contact)
services = []
for parcel, packs in parcels:
# rates depend on dimensions + origin + destination only
cache_key = "CP-GetRates-{W}-{l}x{w}x{h}-{fr}-{to}".format(
W=parcel.weight, w=parcel.width, h=parcel.height, l=parcel.length,
fr=origin.postal_code, to=destination.postal_code
)
if cache.has_key(cache_key):
parcel_services = cache.get(cache_key)
else:
try:
parcel_services = cpa.get_rates(parcel, origin, destination)
except CanadaPostError, e:
if self.settings.RAISE_TOO_LARGE.value and e.code == 9111:
raise ParcelTooLarge, e.message
parcel_services = []
cache.set(cache_key, parcel_services)
# so services is [(Service, parcel, [packs]),...]
services.extend(product(filter(lambda s: s.code == self.service_code,
parcel_services), [parcel], [packs]))
