Forienkey to same table

[Mohsen Pahlevanzadeh]

I have table A with my following fields:
1. id (PK)
2. fname (text)
3. name (text)
4. A_id (integer)

I have problem with 4th field, Because it has to refrenced to id
field. I can't implement it into Django.

How can I write model class for above table in models.py ?

--mohsen

[Stephen J. Butler]

Instead of using the model class, or string name of the model class, use the string value 'self'.

https://docs.djangoproject.com/en/3.0/ref/models/fields/#foreignkey

--
You received this message because you are subscribed to the Google Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to django-users...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CAJFFGZKZLQDNMA%2BzSUFKvUX8c0eMe%2B7do73cV1RyZTO1q-A3gg%40mail.gmail.com.

[Metehan Gülaç]

first of all, you can remove the 1. id (pK) line. django already create this field for you in background. I think you want to reference id field of A table to himself; it is known as recursive relationship. Speaking the which, you can use:

models.ForeignKey('self', on_delete=models.CASCADE)


30 Mart 2020 Pazartesi 05:45:11 UTC+3 tarihinde Mohsen Pahlevanzadeh yazdı:

[Motaz Hejaze]

What are the usages lf such a technique ??

--

You received this message because you are subscribed to the Google Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to django-users...@googlegroups.com.

To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/ebd316df-e70f-4e7e-ba02-55fede43909e%40googlegroups.com.