def get_or_create_current_instance(cls):
        """Get the instance model corresponding to the current system, or create a new
        one if the system is new or its properties have changed (e.g. OS from upgrade)."""

        # on Android, platform.platform() barfs, so we handle that safely here
        try:
            plat = platform.platform()
        except:
            plat = "Unknown (Android?)"

        kwargs = {
            "platform": plat,
            "hostname": platform.node(),
            "sysversion": sys.version,
            "database": DatabaseIDModel.get_or_create_current_database_id(),
            "db_path": os.path.abspath(settings.DATABASES['default']['NAME']),
            "system_id": os.environ.get("MORANGO_SYSTEM_ID", ""),
        }

        # try to get the MAC address, but exclude it if it was a fake (random) address
        mac = uuid.getnode()
        if (mac >> 40) % 2 == 0:  # 8th bit (of 48 bits, from left) is 1 if MAC is fake
            hashable_identifier = "{}:{}".format(kwargs['database'].id, mac)
            kwargs["node_id"] = hashlib.sha1(hashable_identifier.encode('utf-8')).hexdigest()[:20]
        else:
            kwargs["node_id"] = ""

        # do within transaction so we only ever have 1 current instance ID
        with transaction.atomic():
            InstanceIDModel.objects.filter(current=True).update(current=False)
            obj, created = InstanceIDModel.objects.get_or_create(**kwargs)
            obj.current = True
            obj.save()

        return obj, created
def get_or_create_current_instance(cls):
        """Get the instance model corresponding to the current system, or create a new
        one if the system is new or its properties have changed (e.g. OS from upgrade)."""

        # on Android, platform.platform() barfs, so we handle that safely here
        try:
            plat = platform.platform()
        except:
            plat = "Unknown (Android?)"

        kwargs = {
            "platform": plat,
            "hostname": platform.node(),
            "sysversion": sys.version,
            "database": DatabaseIDModel.get_or_create_current_database_id(),
            "db_path": os.path.abspath(settings.DATABASES['default']['NAME']),
            "system_id": os.environ.get("MORANGO_SYSTEM_ID", ""),
        }

        # try to get the MAC address, but exclude it if it was a fake (random) address
        mac = uuid.getnode()
        if (mac >> 40) % 2 == 0:  # 8th bit (of 48 bits, from left) is 1 if MAC is fake
            hashable_identifier = "{}:{}".format(kwargs['database'].id, mac)
            kwargs["node_id"] = hashlib.sha1(hashable_identifier.encode('utf-8')).hexdigest()[:20]
        else:
            kwargs["node_id"] = ""

        # do within transaction so we only ever have 1 current instance ID
        with transaction.atomic():
            InstanceIDModel.objects.filter(current=True).update(current=False)
            obj, created = InstanceIDModel.objects.get_or_create(**kwargs)
            obj.current = True
            obj.save()

        return obj, created
def get_or_create_current_instance ( cls ) : # on Android, platform.platform() barfs, so we handle that safely here try : plat = platform . platform ( ) except : plat = "Unknown (Android?)" kwargs = { "platform" : plat , "hostname" : platform . node ( ) , "sysversion" : sys . version , "database" : DatabaseIDModel . get_or_create_current_database_id ( ) , "db_path" : os . path . abspath ( settings . DATABASES [ 'default' ] [ 'NAME' ] ) , "system_id" : os . environ . get ( "MORANGO_SYSTEM_ID" , "" ) , } # try to get the MAC address, but exclude it if it was a fake (random) address mac = uuid . getnode ( ) if ( mac >> 40 ) % 2 == 0 : # 8th bit (of 48 bits, from left) is 1 if MAC is fake hashable_identifier = "{}:{}" . format ( kwargs [ 'database' ] . id , mac ) kwargs [ "node_id" ] = hashlib . sha1 ( hashable_identifier . encode ( 'utf-8' ) ) . hexdigest ( ) [ : 20 ] else : kwargs [ "node_id" ] = "" # do within transaction so we only ever have 1 current instance ID with transaction . atomic ( ) : InstanceIDModel . objects . filter ( current = True ) . update ( current = False ) obj , created = InstanceIDModel . objects . get_or_create ( * * kwargs ) obj . current = True obj . save ( ) return obj , created
Get the instance model corresponding to the current system, or create a new
        one if the system is new or its properties have changed (e.g. OS from upgrade).
Get the instance model corresponding to the current system or create a new one if the system is new or its properties have changed ( e . g . OS from upgrade ) .