[Django] #35159: dumpdata does not work in 5.0.1 on QuerySets with prefetch_related

[Django]

#35159: dumpdata does not work in 5.0.1 on QuerySets with prefetch_related
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Reporter: Andrea F | Owner: nobody
Type: Bug | Status: new
Component: Core | Version: 5.0
(Management commands) | Keywords: dumpdata chunk_size
Severity: Normal | iterator prefetch_related
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 1
UI/UX: 0 |
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The `./manage.py dumpdata` management command calls `iterator()` on the
QuerySets of the models, but it does not pass
`chunk_size`([https://github.com/django/django/blob/main/django/core/management/commands/dumpdata.py#L222]).
On model QuerySets that include `prefetch_related`, this now (with 5.0)
causes this error while running `dumpdata`:

> CommandError: Unable to serialize database: chunk_size must be provided
when using QuerySet.iterator() after prefetch_related().

Proposed fix is to pass a suitable `chunk_size` parameter to `iterator()`
within `handle()` in `dumpdata.py`.
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Ticket URL: <https://code.djangoproject.com/ticket/35159>
Django <https://code.djangoproject.com/>
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[Django]

#35159: dumpdata does not work in 5.0.1 on QuerySets with prefetch_related
-------------------------------------+-------------------------------------

Reporter: Andrea F | Owner: yushan
Type: Bug | Status: assigned
Component: Core (Management | Version: 5.0
commands) |
Severity: Normal | Resolution:
Keywords: dumpdata chunk_size | Triage Stage:
iterator prefetch_related | Unreviewed
Has patch: 0 | Needs documentation: 0

Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 1 | UI/UX: 0
-------------------------------------+-------------------------------------

Changes (by yushan):

* owner: nobody => yushan
* status: new => assigned

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Ticket URL: <https://code.djangoproject.com/ticket/35159#comment:1>