def update_receivers():
"""Update the receiver table."""
# get the timestamp of last update
last_update_query = app.session.query(
coalesce(func.max(Receiver.lastseen), "2015-01-01 00:00:00").label("last_entry")
)
last_update = last_update_query.one().last_entry
# get last receiver beacons since last update
last_receiver_beacon_sq = (
app.session.query(ReceiverBeacon.name, func.max(ReceiverBeacon.timestamp).label("lastseen"))
.filter(ReceiverBeacon.timestamp >= last_update)
.group_by(ReceiverBeacon.name)
.subquery()
)
receivers_to_update = (
app.session.query(
ReceiverBeacon.name,
ReceiverBeacon.latitude,
ReceiverBeacon.longitude,
ReceiverBeacon.altitude,
last_receiver_beacon_sq.columns.lastseen,
ReceiverBeacon.version,
ReceiverBeacon.platform,
)
.filter(
and_(
ReceiverBeacon.name == last_receiver_beacon_sq.columns.name,
ReceiverBeacon.timestamp == last_receiver_beacon_sq.columns.lastseen,
)
)
.subquery()
)
# set country code to None if lat or lon changed
count = (
app.session.query(Receiver)
.filter(
and_(
Receiver.name == receivers_to_update.columns.name,
or_(
Receiver.latitude != receivers_to_update.columns.latitude,
Receiver.longitude != receivers_to_update.columns.longitude,
),
)
)
.update(
{
"latitude": receivers_to_update.columns.latitude,
"longitude": receivers_to_update.columns.longitude,
"country_code": null(),
}
)
)
logger.info("Count of receivers who changed lat or lon: {}".format(count))
# update lastseen of known receivers
count = (
app.session.query(Receiver)
.filter(Receiver.name == receivers_to_update.columns.name)
.update(
{
"altitude": receivers_to_update.columns.altitude,
"lastseen": receivers_to_update.columns.lastseen,
"version": receivers_to_update.columns.version,
"platform": receivers_to_update.columns.platform,
}
)
)
logger.info("Count of receivers who where updated: {}".format(count))
# add new receivers
empty_sq = (
app.session.query(
ReceiverBeacon.name,
ReceiverBeacon.latitude,
ReceiverBeacon.longitude,
ReceiverBeacon.altitude,
last_receiver_beacon_sq.columns.lastseen,
ReceiverBeacon.version,
ReceiverBeacon.platform,
)
.filter(
and_(
ReceiverBeacon.name == last_receiver_beacon_sq.columns.name,
ReceiverBeacon.timestamp == last_receiver_beacon_sq.columns.lastseen,
)
)
.outerjoin(Receiver, Receiver.name == ReceiverBeacon.name)
.filter(Receiver.name == null())
.order_by(ReceiverBeacon.name)
)
for receiver_beacon in empty_sq.all():
receiver = Receiver()
receiver.name = receiver_beacon.name
receiver.latitude = receiver_beacon.latitude
receiver.longitude = receiver_beacon.longitude
receiver.altitude = receiver_beacon.altitude
receiver.firstseen = None
receiver.lastseen = receiver_beacon.lastseen
receiver.version = receiver_beacon.version
receiver.platform = receiver_beacon.platform
app.session.add(receiver)
logger.info("{} added".format(receiver.name))
# update firstseen if None
firstseen_null_query = (
app.session.query(Receiver.name, func.min(ReceiverBeacon.timestamp).label("firstseen"))
.filter(Receiver.firstseen == null())
.join(ReceiverBeacon, Receiver.name == ReceiverBeacon.name)
.group_by(Receiver.name)
.subquery()
)
count = (
app.session.query(Receiver)
.filter(Receiver.name == firstseen_null_query.columns.name)
.update({"firstseen": firstseen_null_query.columns.firstseen})
)
logger.info("Total: {} receivers added".format(count))
# update country code if None
unknown_country_query = app.session.query(Receiver).filter(Receiver.country_code == null()).order_by(Receiver.name)
for receiver in unknown_country_query.all():
receiver.country_code = get_country_code(receiver.latitude, receiver.longitude)
if receiver.country_code is not None:
logger.info("Updated country_code for {} to {}".format(receiver.name, receiver.country_code))
app.session.commit()
def update_receivers():
"""Update the receiver table."""
# get the timestamp of last update
last_update_query = app.session.query(coalesce(func.max(Receiver.lastseen), '2015-01-01 00:00:00').label('last_entry'))
last_update = last_update_query.one().last_entry
# get last receiver beacons since last update
last_receiver_beacon_sq = app.session.query(ReceiverBeacon.name,
func.max(ReceiverBeacon.timestamp).label('lastseen')) \
.filter(ReceiverBeacon.timestamp >= last_update) \
.group_by(ReceiverBeacon.name) \
.subquery()
# update receivers
receivers_to_update = app.session.query(ReceiverBeacon.name,
ReceiverBeacon.location_wkt,
ReceiverBeacon.altitude,
last_receiver_beacon_sq.columns.lastseen,
ReceiverBeacon.version,
ReceiverBeacon.platform) \
.filter(and_(ReceiverBeacon.name == last_receiver_beacon_sq.columns.name,
ReceiverBeacon.timestamp == last_receiver_beacon_sq.columns.lastseen)) \
.subquery()
# ... set country code to None if lat or lon changed
changed_count = app.session.query(Receiver) \
.filter(Receiver.name == receivers_to_update.columns.name) \
.filter(or_(not_(func.ST_Equals(Receiver.location_wkt, receivers_to_update.columns.location)),
and_(Receiver.location_wkt == null(),
receivers_to_update.columns.location != null()))) \
.update({"location_wkt": receivers_to_update.columns.location,
"country_code": null()},
synchronize_session=False)
# ... and update altitude, lastseen, version and platform
update_count = app.session.query(Receiver) \
.filter(Receiver.name == receivers_to_update.columns.name) \
.update({"altitude": receivers_to_update.columns.altitude,
"lastseen": receivers_to_update.columns.lastseen,
"version": receivers_to_update.columns.version,
"platform": receivers_to_update.columns.platform})
# add new receivers
empty_sq = app.session.query(ReceiverBeacon.name,
ReceiverBeacon.location_wkt,
ReceiverBeacon.altitude,
last_receiver_beacon_sq.columns.lastseen,
ReceiverBeacon.version, ReceiverBeacon.platform) \
.filter(and_(ReceiverBeacon.name == last_receiver_beacon_sq.columns.name,
ReceiverBeacon.timestamp == last_receiver_beacon_sq.columns.lastseen)) \
.outerjoin(Receiver, Receiver.name == ReceiverBeacon.name) \
.filter(Receiver.name == null()) \
.order_by(ReceiverBeacon.name)
for receiver_beacon in empty_sq.all():
receiver = Receiver()
receiver.name = receiver_beacon.name
receiver.location_wkt = receiver_beacon.location_wkt
receiver.altitude = receiver_beacon.altitude
receiver.firstseen = None
receiver.lastseen = receiver_beacon.lastseen
receiver.version = receiver_beacon.version
receiver.platform = receiver_beacon.platform
app.session.add(receiver)
logger.info("{} added".format(receiver.name))
# update firstseen if None
firstseen_null_query = app.session.query(Receiver.name,
func.min(ReceiverBeacon.timestamp).label('firstseen')) \
.filter(Receiver.firstseen == null()) \
.join(ReceiverBeacon, Receiver.name == ReceiverBeacon.name) \
.group_by(Receiver.name) \
.subquery()
added_count = app.session.query(Receiver) \
.filter(Receiver.name == firstseen_null_query.columns.name) \
.update({'firstseen': firstseen_null_query.columns.firstseen})
# update country code if None
unknown_country_query = app.session.query(Receiver) \
.filter(Receiver.country_code == null()) \
.filter(Receiver.location_wkt != null()) \
.order_by(Receiver.name)
for receiver in unknown_country_query.all():
location = receiver.location
country_code = get_country_code(location.latitude, location.longitude)
if country_code is not None:
receiver.country_code = country_code
logger.info("Updated country_code for {} to {}".format(receiver.name, receiver.country_code))
logger.info("Added: {}, location changed: {}".format(added_count, changed_count))
app.session.commit()
return update_count