def remove_participants(event, leavers):
# check, that leaver is participated
leavers = is_participated(event, leavers)
if not leavers:
return
participants = Participation.objects.filter(event=event, active=True)
exist_parts = participants.aggregate(s=Sum('parts'))['s']
exist_parts = 0.0 if exist_parts is None else exist_parts # fix None
party_pay = event.price / exist_parts
rest_participations = participants.filter(~Q(account__in=leavers))
leaver_participations = participants.filter(account__in=list(leavers))
# return money
for participation in leaver_participations:
leaver_transaction = Transaction(participation=participation,
type=Transaction.OUT)
debit = party_pay * participation.parts
leaver_transaction.debit = debit
leaver_transaction.save()
# create diffs
# yep folks, you should pay for this leavers
rest_parts = rest_participations.aggregate(s=Sum('parts'))['s']
for victum in rest_participations:
credit = ((leaver_transaction.debit / rest_parts)
* victum.parts)
delegate_debt(victum, credit, leaver_transaction)
leaver_participations.update(active=False)
def remove_participants(event, leavers):
# check, that leaver is participated
leavers = is_participated(event, leavers)
if not leavers:
return
participants = Participation.objects.filter(event=event, active=True)
exist_parts = participants.aggregate(s=Sum('parts'))['s']
exist_parts = 0.0 if exist_parts is None else exist_parts # fix None
party_pay = event.price / exist_parts
rest_participations = participants.filter(~Q(account__in=leavers))
leaver_participations = participants.filter(account__in=list(leavers))
# return money
for participation in leaver_participations:
leaver_transaction = Transaction(participation=participation,
type=Transaction.OUT)
debit = party_pay * participation.parts
leaver_transaction.debit = debit
leaver_transaction.save()
# create diffs
# yep folks, you should pay for this leavers
rest_parts = rest_participations.aggregate(s=Sum('parts'))['s']
for victum in rest_participations:
credit = ((leaver_transaction.debit / rest_parts) * victum.parts)
delegate_debt(victum, credit, leaver_transaction)
leaver_participations.update(active=False)
def return_money(participation, debit, parent):
"""Make diff transactions for given participation(event,user) with given
debit. This means, that we get money from event and return it to user.
@param participation: Event-User link that for create transaction
@type participation: Participation
@param debit: Money count that was returned
@type debit: float
@param parent: Parent transaction, that initiate return(incomer for
example)
@type parent: Transaction
"""
t = Transaction(participation=participation, type=Transaction.DIFF,
parent=parent)
t.debit = debit
t.save()
def return_money(participation, debit, parent):
"""Make diff transactions for given participation(event,user) with given
debit. This means, that we get money from event and return it to user.
@param participation: Event-User link that for create transaction
@type participation: Participation
@param debit: Money count that was returned
@type debit: float
@param parent: Parent transaction, that initiate return(incomer for
example)
@type parent: Transaction
"""
t = Transaction(participation=participation,
type=Transaction.DIFF,
parent=parent)
t.debit = debit
t.save()
