RE: There is any way to prevent cascade delete on FK field, without using signal?

Hi Felipe,

I found this question on Stack Overflow, which seems to provide some insight on how to accomplish what you want.

https://stackoverflow.com/questions/4825815/prevent-delete-in-django-model

Basically, you need to override the delete method on the model and on the QuerySet of the model's managers.  Take a look at the last answer.

 

Still, I'm curious why setting the on_delete parameter to DO_NOTHING doesn't work for you.  Are you overriding something in your code?

 

From: django-users@googlegroups.com [mailto:django-users@googlegroups.com] On Behalf Of Fellipe Henrique
Sent: Wednesday, October 4, 2017 6:36 AM
To: Django Users
Subject: Re: There is any way to prevent cascade delete on FK field, without using signal?

 

I read the docs, but doesn't work for me... still delete the record... I looking something directly to model, not using view... there's any way to do that?

T.·.F.·.A.·.     S+F

Fellipe Henrique P. Soares

 

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On Tue, Oct 3, 2017 at 1:39 PM, Fabio C. Barrionuevo da Luz <bnafta@gmail.com> wrote:

explicitly define what to do when there is a deletion.

 

use the "on_delete" parameter of ForeignKey/OneToOneField

on django <=1.11, on_delete is optional, and its default value is CASCADE.

after django >- 2.0, it is mandatory to set "on_delete"


https://docs.djangoproject.com/en/1.11/ref/models/fields/#django.db.models.ForeignKey.on_delete

 

https://medium.com/@ajrbyers/django-fk-on-delete-defaults-to-cascade-1c1506aae7c7

 

 

2017-10-03 13:28 GMT-03:00 Fellipe Henrique <fellipeh@gmail.com>:

There is any way to prevent cascade delete on FK field, without using signal?

 

I need to block the Delete process, not to set NULL on field.. 

 

Regards!

 

T.·.F.·.A.·.     S+F

Fellipe Henrique P. Soares

 

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