don't want inner joins on django models - django

Question

i've migrated an existing database that i would like to work with django. i have the following models:
class Device(models.Model):
class Meta:
db_table = u'DEVICES'
managed=False
id = models.CharField(primary_key=True, max_length=22, db_column='DEVICE_ID')
name = models.CharField(max_length=40, db_column='DEVICE_NAME')
status = models.CharField(max_length=10, db_column='STATUS')
class DevicePort(models.Model):
class Meta:
db_table = u'DEVICE_PORT'
managed=False
id = models.CharField( primary_key=True, max_length=22, db_column='DEVICE_PORT_ID')
device = models.OneToOneField(Device, db_column='DEVICE_ID')
type = models.CharField( max_length=22, db_column='PORT_TYPE_ID')
port_num = models.CharField( max_length=30, db_column='DEVICE_PORT_NUM')
class IP(models.Model):
class Meta:
db_table = u'IP_NODE'
managed=False
ip_address = models.CharField(primary_key=True, max_length=15, db_column='IP_NODE_NO')
hostname = models.CharField(max_length=40, db_column='IP_HOST')
port = models.OneToOneField(DevicePort, db_column='DEVICE_PORT_ID')
status = models.CharField(max_length=50, db_column='IP_NODE_STATUS')
i want a list of Devices and their relational IP.ip_address and IP.hostnames. In SQL, i would do something like:
SELECT UNIQUE
d.device_name device
FROM
IP_NODE c,
DEVICES d,
DEVICE_PORT e
WHERE
c.ip_node_no = b.ip_node_no
AND c.device_port_id = e.device_port_id
AND e.device_id = d.device_id
AND d.device_name LIKE 'something';
How do i do this with my django models?

Answer 1

So instead of an inner join you want...and implicit join? Is there something I'm missing here because an implicit join is slower than an explicit one most all cases.
[http://postgresql.1045698.n5.nabble.com/explicit-JOIN-faster-than-implicit-td1920335.html][1]
I can't see any reason you would want to do this, but as stated above you can certainty get this by writing your own queries with raw, or even connection.cursor. Maybe even could pull it off with extra(tables=[...]), though I'm not positive as I've never used tables like this.