Release Notes

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• collectstatic may now fail during post-processing

  Jira Legacy
  showSummary false server JIRA (openedx.atlassian.net) serverId 13fd1930-5608-3aac-a5dd-21b934d3a4b4 key PLAT-1363

  when using a hashed static files storage if a reference loop exists (e.g. 'foo.css' references 'bar.css' which itself references 'foo.css') or if the chain of files referencing other files is too deep to resolve in several passes. In the latter case, increase the number of passes usingManifestStaticFilesStorage.max_post_process_passes.
• When using ManifestStaticFilesStorage, static files not found in the manifest at runtime now raise a ValueError instead of returning an unchanged path. You can revert to the old behavior by setting ManifestStaticFilesStorage.manifest_strict to False.

...

from tzlocal import get_localzone

TIME_ZONE = get_localzone().zone

This works similar to settings.TIME_ZONE = None except that it also sets os.environ['TZ']. Let us know if there’s a use case where you find you can’t adapt your code to set a TIME_ZONE.

...

from django.db import models

class MyModel(models.Model):
    ...

    @models.permalink
    def url(self):
        return ('guitarist_detail', [self.slug])

becomes:

from django.db import models
from django.urls import reverse

class MyModel(models.Model):
    ...

    def url(self):
        return reverse('guitarist_detail', args=[self.slug])

Miscellaneous¶

• contrib.auth’s login() and logout() function-based views are deprecated in favor of new class-based views LoginView andLogoutView.
• The unused extra_context parameter of contrib.auth.views.logout_then_login() is deprecated.
• contrib.auth’s password_change(), password_change_done(), password_reset(), password_reset_done(), password_reset_confirm(), and password_reset_complete() function-based views are deprecated in favor of new class-based views PasswordChangeView, PasswordChangeDoneView, PasswordResetView, PasswordResetDoneView,PasswordResetConfirmView, and PasswordResetCompleteView.
• django.test.runner.setup_databases() is moved to django.test.utils.setup_databases(). The old location is deprecated.
• django.utils.translation.string_concat() is deprecated in favor of django.utils.text.format_lazy(). string_concat(*strings) can be replaced by format_lazy('{}' * len(strings), *strings).
• For the PyLibMCCache cache backend, passing pylibmc behavior settings as top-level attributes of OPTIONS is deprecated. Set them under a behaviors key within OPTIONS instead.
• The host parameter of django.utils.http.is_safe_url() is deprecated in favor of the new allowed_hosts parameter.
• Silencing exceptions raised while rendering the {% include %} template tag is deprecated as the behavior is often more confusing than helpful. In Django 2.1, the exception will be raised.
• DatabaseIntrospection.get_indexes() is deprecated in favor of DatabaseIntrospection.get_constraints().
• authenticate() now passes a request argument to the authenticate() method of authentication backends. Support for methods that don’t accept request as the first positional argument will be removed in Django 2.1.
• The USE_ETAGS setting is deprecated in favor of ConditionalGetMiddleware which now adds the ETag header to responses regardless of the setting. CommonMiddleware and django.utils.cache.patch_response_headers() will no longer set ETags when the deprecation ends.
• Model._meta.has_auto_field is deprecated in favor of checking if Model._meta.auto_field is not None.
• Using regular expression groups with iLmsu# in url() is deprecated. The only group that’s useful is (?i) for case-insensitive URLs, however, case-insensitive URLs aren’t a good practice because they create multiple entries for search engines, for example. An alternative solution could be to create a handler404 that looks for uppercase characters in the URL and redirects to a lowercase equivalent.
• The renderer argument is added to the Widget.render() method. Methods that don’t accept that argument will work through a deprecation period.