[Django] #29321: when instance.delete() while cause memory leak

[Django]

#29321: when instance.delete() while cause memory leak
-----------------------------------------+------------------------
Reporter: yywing | Owner: nobody
Type: Bug | Status: new
Component: Uncategorized | Version: 2.0
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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{{{
class A(models.Model):
xxxxxxx
class B(models.Model):
a = models.ForeignKey(A, on_delete=models.CASCADE)
xxxxx
class C(models.Model):
b = models.ForeignKey(B, on_delete=models.CASCADE)
xxxxxx
A.objects.first().delete()
}}}
When I delete an instance of A, if A has is related with many B and B is
related with many C, then it will cause memory leak.
And I found django on_delete has no effect at SQL level.
And I really want that when I delete A ,related B is deleted.

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Ticket URL: <https://code.djangoproject.com/ticket/29321>
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[Django]

#29321: when instance.delete() while cause memory leak

-------------------------------------+-------------------------------------

Reporter: yywing | Owner: nobody
Type: Bug | Status: new

Component: Database layer | Version: 2.0
(models, ORM) |
Severity: Normal | Resolution:

Keywords: | Triage Stage:
| Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0

-------------------------------------+-------------------------------------
Changes (by yywing):

* component: Uncategorized => Database layer (models, ORM)

--
Ticket URL: <https://code.djangoproject.com/ticket/29321#comment:1>

[Django]

#29321: when instance.delete() while cause memory leak

-------------------------------------+-------------------------------------

Reporter: yywing | Owner: nobody
Type: Bug | Status: new

Component: Database layer | Version: 2.0
(models, ORM) |
Severity: Normal | Resolution:

Keywords: | Triage Stage:
| Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0

-------------------------------------+-------------------------------------

Comment (by Tim Graham):

Can you elaborate on the details of the memory leak?

Database-level cascade is the subject of #21961.

--
Ticket URL: <https://code.djangoproject.com/ticket/29321#comment:2>

[Django]

#29321: when instance.delete() while cause memory leak

-------------------------------------+-------------------------------------
Reporter: yywing | Owner: nobody
Type: Bug | Status: closed

Component: Database layer | Version: 2.0
(models, ORM) |

Severity: Normal | Resolution: needsinfo

Keywords: | Triage Stage:
| Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0

-------------------------------------+-------------------------------------
Changes (by Tim Graham):

* status: new => closed
* resolution: => needsinfo

--
Ticket URL: <https://code.djangoproject.com/ticket/29321#comment:3>