#10919: Add an option to disable display of related items on admin's delete
confirmation page (to prevent large memory usage on complex objects)
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Reporter: Tobias McNulty | Owner: nobody
Type: New feature | Status: new
Component: contrib.admin | Version: master
Severity: Normal | Resolution:
Keywords: admin memory limit | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by terminator14):
I am using Django 2.2.10, and this is still an issue.
If I am using Django Admin to delete an object with millions of related
records, it tries to generate the list, takes too long, and my browser
gives up waiting, showing an error loading the page.
I'm not sure how difficult this is to do, but I have some thoughts:
When deleting an object from Django Admin, the summary section is great,
but I really like the fact that Django Admin lists all effected related
objects. If the summary section was the only thing on the page, someone
deleting an object may think "pfft - I know exactly what happens if I
delete this", and delete it without a second thought, without even
bothering to glance at the summary of the number of related objects that
will be effected. I know this sounds like a "that's their problem" type of
deal, but if we can prevent this, why wouldn't we?
The list of effected objects that Django Admin currently provides is very
clear. As soon as the page loads, if you think you are about to delete one
object, but you see a massive list of effected stuff, you immediately
start looking into what you are deleting, and why it effects more than
what you expected.
I think a good solution would be a middle-ground, rather than disabling
the list of related objects.
If you are about to delete an object with a million related objects, have
django do a DB query with something like "limit 100". It will pull 100
related objects, quickly generate the HTML page without trying to list a
million objects on the page, and the user will still have the advantage of
quickly seeing that his delete operation will effect a ton of objects,
since he'll have a hundred objects listed on the page.
To make things clear, add a message at the bottom that says something like
"and 999,900 others" or something. This will tell them that the 100
objects listed aren't the only ones to be deleted.
Any thoughts?
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Ticket URL: <https://code.djangoproject.com/ticket/10919#comment:13>
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