django inner join query

Question

I am working with django and having a hard time grasping how to do complex queries

Here is my model

class TankJournal(models.Model):
    user = model         


        

Answer 1

If you already have your tank object you should be able to do:

tank.user.username

To reduce the database queries you might want to consider the use of select_related(), e.g.

tanks = TankJournal.objects.all().select_related()
for tank in tanks:
    username = tank.user.username

if you have a specific tank id then:

tank = TankJournal.objects.select_related().get(id=123456)
username = tank.user.username