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Enforce is_valid(raise_exception=False) as a keyword-only argument. #7952

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merged 2 commits into from
Aug 10, 2022

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ProstoMaxim
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At the moment is_valid calls are possible without keyword-only arguments, so code
serializer.is_valid(True) is possible and will be quite misleading, especially for new developers. This pull requests makes "raise_exception" name mandatory if serializer is called with argument.

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stale bot commented Apr 28, 2022

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

@stale stale bot added the stale label Apr 28, 2022
@tomchristie tomchristie changed the title Prevent misleading is_valid calls Enforce is_valid(raise_exception=False) as a keyword-only argument. Aug 10, 2022
@stale stale bot removed the stale label Aug 10, 2022
@tomchristie
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This seems like it could be a pretty reasonable change to me, along with a major version bump.

Granted there's probably some codebases that might be forced into a change, OTOH, it is an argument that makes much more sense as a keyword-only case.

Any other maintainers have an opinion on the trade-off here?

@adamchainz
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I like it! This avoids a problem known as "the boolean trap".

@tomchristie tomchristie merged commit 791d48c into encode:master Aug 10, 2022
@romanek-adam-b2c2
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It like it too, but it breaks the existing API and changelog doesn't mention that :(

@tomchristie
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tomchristie commented Sep 29, 2022

It's in https://www.django-rest-framework.org/community/3.14-announcement/ and https://www.django-rest-framework.org/community/release-notes/

But yes, upgrades that break things are a pain. Even when we want them.

@romanek-adam-b2c2
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OK, then it would make sense to include a link to the former in the latter, as originally I only found and read the latter (as I was reviewing tons of changelogs for multiple packages which got updated for my project). Additionally I'd suggest explicitly marking breaking changes with some prefix / tag / whatever ("BREAKING: ...") to make sure no one will miss that. Anyway, keep up the good work!

sigvef pushed a commit to sigvef/django-rest-framework that referenced this pull request Dec 3, 2022
…encode#7952)

* make raise_exception a keyword-only argument

* make raise_exception keyword-only in metaclass
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4 participants