def update_twosell_direct(self):
"""
Update Twosell direct sale stats for purchase.
Only applies to Purchase that is final.
Aggregate values of Twosell direct sales.
"""
# Bail early if this is a preliminary receipt
if not self.final:
raise CalculationException('Cannot calculate Twosell direct on a preliminary purchase.')
purprods = self.purchasedproduct_set.all()
# Bail if both prel and final does not exist
try:
prel = Purchase.prels.get(transactionid=self.transactionid)
except Purchase.DoesNotExist:
purprods.update(direct_gross_incl_vat=0, direct_gross_excl_vat=0)
self.direct_gross_incl_vat = purprods.aggregate(Sum('direct_gross_incl_vat')).values()[0] or Decimal(0)
self.direct_gross_excl_vat = purprods.aggregate(Sum('direct_gross_excl_vat')).values()[0] or Decimal(0)
return
# Check conditions for qualifying purchase as Twosell generated:
# - Final must have total cost greater or equal to total cost for Prel
# - No products should have been removed from Final compared to Prel
# - Must have received a status report that indicates Twosell screen was shown.
#
# Only update Twosell direct for each row if all conditions are met
if prel.total_cost >= self.total_cost or self.removed_products() or not self.direct_reported_shown:
purprods.update(direct_gross_incl_vat=0, direct_gross_excl_vat=0)
else:
for purprod in purprods:
purprod.update_twosell_direct(count_extra=settings.COUNT_EXTRA_AS_TWOSELL)
purprod.save()
# Update Twosell totals on purchase
self.direct_gross_incl_vat = purprods.aggregate(Sum('direct_gross_incl_vat')).values()[0] or Decimal(0)
self.direct_gross_excl_vat = purprods.aggregate(Sum('direct_gross_excl_vat')).values()[0] or Decimal(0)
# Handle limits to Twosell contribution
try:
max_twosell_direct = TwosellConf.objects.latest().max_twosell_direct
except TwosellConf.DoesNotExist:
max_twosell_direct = 1000
if self.direct_gross_incl_vat > max_twosell_direct:
self.direct_net_incl_vat = max_twosell_direct
else:
self.direct_net_incl_vat = self.direct_gross_incl_vat
# Original vat_rate
try:
vat_rate = 100 * (self.direct_gross_incl_vat - self.direct_gross_excl_vat) / self.direct_gross_excl_vat
except (ZeroDivisionError, InvalidOperation):
vat_rate = 0
self.direct_net_excl_vat = calc_excl_vat(vat_rate, self.direct_net_incl_vat)
def _update_excl_vat(self):
"""Update excl_vat fields."""
vat_rate = self.product.vat_rate
self.total_cost_excl_vat = calc_excl_vat(vat_rate, self.total_cost)
self.direct_gross_excl_vat = calc_excl_vat(vat_rate, self.direct_gross_incl_vat)
self.coupon_gross_excl_vat = calc_excl_vat(vat_rate, self.coupon_gross_incl_vat)
