def _move_to_log(self, redeem_time=CodeLog.EXPIRED_REDEEM_TIME, redeem_info='', user_id=0):
with db.transaction():
code_log = CodeLog.create(
text=self.text, gen_event=self.gen_event, redeem_time=redeem_time,
start_time=self.start_time, redeem_info=redeem_info, user_id=user_id)
rows_affected = self.delete_instance()
if rows_affected != 1:
raise Exception('concurrent request has happened')
return code_log
def create_event(ncodes, extra_info, start_time, expire_time, prefix, rand_len):
rand_limit = 36 ** rand_len
if ncodes > rand_limit / 2:
raise Exception('ncodes and rand_len must satisfy ncodes > 36 ** rand_len / 2')
with db.transaction():
event = CodeGenEvent.create(extra_info=extra_info, start_time=start_time,
expire_time=expire_time)
while ncodes > 0:
rand = int_to_str(random.randrange(0, rand_limit), base=36)
code_text = prefix + rand
code = None
try:
code = Code.get(text=code_text)
except Code.DoesNotExist:
pass
if code and code.clean_up_if_expired():
code = None
if code is None:
Code.create(text=code_text, gen_event=event, start_time=start_time, expire_time=expire_time)
ncodes -= 1
return event
