Here is a ticket about the memory issue:
It's hard for me to evaluate the other idea without looking at the code. If
you want to open a ticket and provide a patch, go ahead.
On Friday, October 14, 2016 at 9:08:16 AM UTC-4, Marcin Nowak wrote:
> Hi all.
> Sometimes there is huge amount of related objects. In the effect there is
> no possibility to delete a model because of http timeout error.
> Displaying objects to be deleted is quite nice feature, but just unusable
> in cases like that.
> Another thing is that nobody will read 74k related objects. Believe me. It
> is better to display a summary in that case.
> To display the summary, a related objects must be counted and this is time
> consuming process, of course, but we can count them similar way to
> Collector's fast deletion (using querysets instead of counting models one
> by one).
> There is also other design flaw in ModelAdmin.delete_view() - related
> objects are counted twice: one time for display, and second time after
> confirming deletion (for request.method==POST). For the second case django
> is checking only permissions and collected objects aren't used for anything
> else. Until Django provides no row-level permissions checking those can be
> done without instantiating all related objects again.
> I'd like to suggest:
> - separation of permissions checking from related objects collector,
> - adding configration option for ModelAdmin.delete_view (to display
> related objects, display summary, or finally display nothing).
> Thank you.
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