hello all, together with my Djano app, I am using an independently-
running python scripts, using Django's ORMs. It's running like a
daemon, check one table in DB, and calls function at pre-set time. The
main codes are like:
def main_daemon():
for event in
Daemon_Event.objects.filter(event_occur_time__lte=datetime.datetime.now()
+datetime.timedelta(seconds=60)): #get all daemon event which will
occur within 1 min.
s = (event.event_occur_time-datetime.datetime.now()).seconds
from django.db import connection
connection.close()
sleep(s)
event_handler(event)
def event_handler(event):
###something to deal with the event
print event.related_model_set.get() #for test
And because the Web users can delete events he started, if I don't
use
from django.db import connection
connection.close()
when one event is in the sleep(s) time, and user deletes that event,
then the event_handler(event) will result something strange ( but no
programme error...). for example, after user delete one event, I can't
see the record in database table, but in event_handler(event), the
"print" will still print out the related model object.
so, I added the connection.close(), then the "print" assert exception
as objects doesn't exist, as I expected.
What I want to know is that: before sleep(s), I closed the connect,
and does is re-open database connection automaticly in
event_handler()? is it safe to use like this?
btw, the main_daemon is under transaction.manually_commit().
thanks a lot in advance.
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