As further follow up on this, as far as I can tell, the relevant unit test 
does not run, seemingly due to the use of `translation.override(None)`

Removing, that, and running the test `./runtests.py 
forms_tests.tests.test_input_formats.CustomTimeInputFormatsTests.test_timeField`
 
results in the test failing.

Arthur Pemberton

On Sunday, December 8, 2024 at 8:03:22 PM UTC-5 Arthur Pemberton wrote:

To simplify things further, within a view:

TIME_INPUT_FORMATS = ['%H:%M:%S', '%H:%M:%S.%f', '%H:%M', '%I:%M %p']

and

forms.TimeField.input_formats = ['%H:%M:%S', '%H:%M:%S.%f', '%H:%M']

On Sun, Dec 8, 2024 at 9:55 AM Arthur Pemberton <pem...@gmail.com> wrote:

I finally got back to this. 

I have a failing minimal project (not test) that 
demonstrates TIME_INPUT_FORMATS not being respected:
https://github.com/pembo13/dateentry

In the example, the form should be valid, if TIME_INPUT_FORMATS worked as 
documented.

I _think_ there's something about how the unittest is written that allows 
it to pass, and not expose this.

Regards,
Arthur

On Tue, Mar 5, 2024 at 3:40 PM Adam Johnson <m...@adamj.eu> wrote:

USE_I18N does not disable localization, but internationalization. USE_L10N 
was the setting to enable/disable localization, but it was deprecated in 
Django 4.0: https://docs.djangoproject.com/en/4.0/releases/4.0/#localization 
. It was removed completely in Django 5.0, in this commit: 
https://github.com/django/django/commit/8d98f99a4ab5de6f2c730399f53eba8bf6bea470
 
.

So I think the phrase “if localization is disabled” is at least a little 
bit wrong. But I don’t think the setting is ignored, as there are tests 
confirming that it works: 
https://github.com/django/django/blob/8d98f99a4ab5de6f2c730399f53eba8bf6bea470/tests/forms_tests/tests/test_input_formats.py#L123-L125
 
. The line that reads the setting should be this one: 
https://github.com/django/django/blob/8d98f99a4ab5de6f2c730399f53eba8bf6bea470/django/utils/formats.py#L132
 
.

If you can provide a failing minimal project, that would be useful to keep 
debugging. I have some minimal django project templates at 
https://github.com/adamchainz/django-startproject-templates .

On Tue, Mar 5, 2024, at 8:48 AM, Arthur Pemberton wrote:

Thanks, I'll look into that. But does that mean that 
settings.TIME_INPUT_FORMATS no longer has any use? I don't see any logic 
flows that lead to it being used.

On Tue, Mar 5, 2024 at 3:00 AM David Sanders <shang.xia...@gmail.com> wrote:

Define TIME_INPUT_FORMATS in your local formats.py setup as per: 
https://docs.djangoproject.com/en/5.0/topics/i18n/formatting/#creating-custom-format-files

On Tue, 5 Mar 2024 at 18:43, Arthur Pemberton <pem...@gmail.com> wrote:

The documentation (
https://docs.djangoproject.com/en/5.0/ref/forms/fields/#timefield) says 
that " the default input formats are taken from the active locale format 
TIME_INPUT_FORMATS key, or from TIME_INPUT_FORMATS 
<https://docs.djangoproject.com/en/5.0/ref/settings/#std-setting-TIME_INPUT_FORMATS>
 
if localization is disabled". However, neither my reading of the code, or 
my actual experience shows settings.TIME_INPUT_FORMATS ever being used, 
even with "USE_I18N = False"

TimeField gets the formats from `input_formats = 
formats.get_format_lazy("TIME_INPUT_FORMATS")` which is a lazy version of 
`formats.get_format` -- the documentation of which says "If use_l10n is 
provided and is not None, it forces the value to be localized (or not), 
otherwise it's always localized."

so even with "USE_I18N = False" settings.TIME_INPUT_FORMATS seems to be 
ignored.

How does one use settings.TIME_INPUT_FORMATS ?

Arthur Pemberton


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