May 3, 2023
Django 4.2.1 fixes a security issue with severity „low” and several bugs in 4.2.
Uploading multiple files using one form field has never been supported by
forms.FileField or forms.ImageField as only the last
uploaded file was validated. Unfortunately, Uploading multiple files
topic suggested otherwise.
In order to avoid the vulnerability, ClearableFileInput
and FileInput form widgets now raise ValueError when
the multiple HTML attribute is set on them. To prevent the exception and
keep the old behavior, set allow_multiple_selected to True.
For more details on using the new attribute and handling of multiple files through a single field, see Uploading multiple files.
QuerySet.defer()
when deferring fields by attribute names (#34458).SearchVector function with %
characters (#34459)."cursor_factory" option in OPTIONS on PostgreSQL
(#34466).i18n_patterns() didn’t respect the
prefix_default_language argument when a fallback language of the default
language was used (#34455).i18n_patterns() with prefix_default_language set to
False raised 404 errors for a request with a different language
(#34515).HttpRequest, HttpResponse, and their subclasses didn’t always work
correctly (#34482, #34484).timesince and timeuntil
template filters returned incorrect results for a datetime with a non-UTC
timezone when a time difference is less than 1 day (#34483).SearchHeadline function with
psycopg 3 (#34486).ClearableFileInput
margins in the admin (#34506).AddIndex, RemoveIndex,
RenameIndex, and CreateModel operations which allows removing a
deprecated Meta.index_together option from historical migrations and use
Meta.indexes instead (#34525).sie 06, 2024