def give(self, amount, taker, **kwargs):
amount = int(amount)
if not amount:
raise Move.Zero("Can't give 0")
elif amount < 0:
raise Move.Negative("Can't give negative")
with NestingTransaction():
if refs.equals(taker, self.obj):
raise Move.Self("Can't give to self")
have = self.have
if have < amount:
raise Move.NeedMore("{} is not enough to give {}".format(have, amount))
return self.create(taker=taker, amount=amount, **kwargs)
def feeds_user(self, user):
print 'feeds user %s == %s -> %s' % (self, user, refs.equals(self.user, user))
return refs.equals(self.user, user)