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Protection against invalid type returned from sqlite

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This commit is contained in:
Hendrik Borras 2018-01-08 18:46:51 +01:00
parent 1c27c3d6da
commit 7bd85ba335
1 changed files with 10 additions and 1 deletions
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11
backend/mqtt_publisher.py
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@ -77,7 +77,16 @@ while(True):
# get the most recent time
cursor.execute("SELECT * FROM Events ORDER BY UTCUnixTime DESC, SubSeconds DESC;")
latest_time = cursor.fetchone()[0]
time_row = cursor.fetchone()
# ToDo: Popper protection against an empty DB, this isn't working for some reason, but systemd will restart the program, so it's not completly deadly...
if time_row == type(None):
log.info("Got a none type, retrying in a bit")
# sleep for a semi random time
time_to_wait = int(random.randrange(30, 90))
log.info("Sleeping for: {} [s]".format(time_to_wait))
time.sleep(time_to_wait)
continue
latest_time = time_row[0]
# Get the next events that will be sent
cursor.execute("SELECT * FROM Events WHERE UTCUnixTime > ?;", (last_sent_event_timestamp,))