Django - queryset containing foreign key reference

Hi,

How would i go about getting all the results from 2 tables that match foreign key to primary key?

SQL:- select * from company_room, company_property where company_room.property_id = company_property.id

Model.py
class Property(models.Model):
  street = models.CharField(max_length=100, blank=False)
  city = models.CharField(max_length=100, blank=False)

class Room(models.Model):
  room_number = models.IntegerField(blank=True)
  property = models.ForeignKey(Property) 

Open in new window


Forms.py

class RoomsForm(forms.ModelForm):
    selection = ModelChoiceField(queryset=Room.objects.all())

    class Meta:
        model = Room
        fields = "__all__"

Open in new window


Thanks in advance,
MP
MK15Asked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

gelonidaCommented:
Room.objects.filter(property__isnull=False).select_related()

Open in new window


In your case you don't seem to allow a None value for property, so even
Room.objects.all().select_related()

all_entries = Room.objects.all().select_related()
print("QUERY: all_entries %s" % all_entries.query)
for row in all_entries:
    print(row.room_number, row.property.street, row.property.city)

Open in new window



should do the job.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Python

From novice to tech pro — start learning today.