None, None, None,
"SET previous_cell_id=if_not_exists(current_cell_id,0);current_cell_id="
+ cell_id +
";change_cell_id_indicator=(previous_cell_id != current_cell_id);",
None)
if res.status_code not in (200, 204):
print("Error during update of passengers table. Error code is " +
str(res.status_code))
# Get current and previous cell for passenger
response_json = igz_nosql_web.ngx_get_item_request(
s,
WEBAPI_URL,
PASSENGERS_TABLE_PATH + "passenger_" + passenger_id,
None,
None,
exp_attrs=[
"change_cell_id_indicator", "current_cell_id",
"previous_cell_id"
])
# Check if a cell update is needed
attrs = response_json["Item"]
change_cell_id_indicator_val = attrs["change_cell_id_indicator"][
"BOOL"]
current_cell_id_val = attrs["current_cell_id"]["N"]
previous_cell_id_val = attrs["previous_cell_id"]["N"]
#for key, value in attrs.items():
# print("attr: {}, value: {}".format(key, value["N"]))
# Try to increase the count on the cell the driver moved to
# update driver current and previous location
res = igz_nosql_web.ngx_update_expression_request(s,BASE_URL, DRIVERS_PATH_IN_URL + "driver_" + driver_id, None, None,
"CreateOrReplaceAttributes",
"previous_cell_id=current_cell_id;current_cell_id=" + cell_id + ";change_cell_id_indicator=(previous_cell_id != current_cell_id);",
"exists(current_cell_id)")
# if driver does not exist, add driver
if res.status_code == requests.codes.bad_request:
igz_nosql_web.ngx_update_expression_request(s,BASE_URL, DRIVERS_PATH_IN_URL + "driver_" + driver_id, None, None,
"CreateOrReplaceAttributes",
"current_cell_id=" + cell_id + ";previous_cell_id=0;change_cell_id_indicator=(1==1);",
"(1==1)")
# Get current and previous cell for driver
response_json = igz_nosql_web.ngx_get_item_request(s,BASE_URL, DRIVERS_PATH_IN_URL+"driver_"+driver_id,None,None,exp_attrs=["change_cell_id_indicator","current_cell_id","previous_cell_id"])
# Check if a cell update is needed
attrs = response_json["Item"]
change_cell_id_indicator_val = attrs["change_cell_id_indicator"]["BOOL"]
current_cell_id_val = attrs["current_cell_id"]["N"]
previous_cell_id_val = attrs["previous_cell_id"]["N"]
#for key, value in attrs.items():
# print("attr: {}, value: {}".format(key, value["N"]))
# Try to increase the count on the cell the driver moved to
if change_cell_id_indicator_val:
res=igz_nosql_web.ngx_update_expression_request(s,BASE_URL, CELLS_PATH_IN_URL + "cell_"+ current_cell_id_val, None, None,
"CreateOrReplaceAttributes",
"count=count+1;",
"exists(count)")