#23550: Normalize implementation of SingleRelatedObjectDescriptor.get_queryset()
and ReverseSingleRelatedObjectDescriptor.get_queryset().
-------------------------------------+-------------------------------------
     Reporter:  loic                 |                    Owner:  nobody
         Type:                       |                   Status:  new
  Cleanup/optimization               |                  Version:  master
    Component:  Database layer       |               Resolution:
  (models, ORM)                      |             Triage Stage:  Accepted
     Severity:  Normal               |      Needs documentation:  0
     Keywords:                       |  Patch needs improvement:  0
    Has patch:  0                    |                    UI/UX:  0
  Needs tests:  0                    |
Easy pickings:  0                    |
-------------------------------------+-------------------------------------
Description changed by loic:

Old description:

> `ReverseSingleRelatedObjectDescriptor.get_queryset()` instantiates a
> `QuerySet` directly which is problematic because it doesn't account for
> custom `QuerySet` types and
> `SingleRelatedObjectDescriptor.get_queryset()` doesn't honor
> `use_for_related_fields` which is inconsistent with
> `ReverseSingleRelatedObjectDescriptor`.

New description:

 Both `SingleRelatedObjectDescriptor` and
 `ReverseSingleRelatedObjectDescriptor` can return `Manager` instances
 which is inconsistent with the name of the method `get_queryset()`.

 `ReverseSingleRelatedObjectDescriptor.get_queryset()` instantiates a
 `QuerySet` directly which is problematic because it doesn't account for
 custom `QuerySet` types.

 `SingleRelatedObjectDescriptor.get_queryset()` doesn't honor
 `use_for_related_fields` which is inconsistent with
 `ReverseSingleRelatedObjectDescriptor`.

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Ticket URL: <https://code.djangoproject.com/ticket/23550#comment:1>
Django <https://code.djangoproject.com/>
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