Import field with Django 5.0 db_default date

See the reported issue.

How to reproduce

Create Python environment:

python -m venv .venv
.\.venv\Scripts\activate
pip install -r requirements.txt

Create and deploy PostgreSql database:

createdb -U postgres bugs
python manage.py migrate

Create super user:

$env:DJANGO_SUPERUSER_PASSWORD = "admin"
python manage.py createsuperuser --noinput --username admin --email [email protected]

Run server:

python manage.py runserver

Go to http://localhost:8000/admin/import_db_default/item/, click Import and select sample.csv.

Error

AttributeError: 'DatabaseDefault' object has no attribute 'utcoffset'

My environment:

• Windows 10 22H2 (build 19045.3930)
• Python 3.11.5
• PostgreSQL 15.4
• Django 5.0.1
• Psycopg 3.1.17
• Django-import-export 3.3.6

Error traceback:

Traceback (most recent call last):
File "…\import-db-default\.venv\Lib\site-packages\import_export\resources.py", line 785, in import_row
diff = self.get_diff_class()(self, original, new)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "…\import-db-default\.venv\Lib\site-packages\import_export\resources.py", line 259, in __init__
self.left = self._export_resource_fields(resource, instance)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "…\import-db-default\.venv\Lib\site-packages\import_export\resources.py", line 280, in _export_resource_fields
return [
^
File "…\import-db-default\.venv\Lib\site-packages\import_export\resources.py", line 281, in <listcomp>
resource.export_field(f, instance) if instance else ""
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "…\import-db-default\.venv\Lib\site-packages\import_export\resources.py", line 1066, in export_field
return field.export(obj)
^^^^^^^^^^^^^^^^^
File "…\import-db-default\.venv\Lib\site-packages\import_export\fields.py", line 148, in export
return self.widget.render(value, obj)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "…\import-db-default\.venv\Lib\site-packages\import_export\widgets.py", line 266, in render
value = timezone.localtime(value)
^^^^^^^^^^^^^^^^^^^^^^^^^
File "…\import-db-default\.venv\Lib\site-packages\django\utils\timezone.py", line 182, in localtime
if is_naive(value):
^^^^^^^^^^^^^^^
File "…\import-db-default\.venv\Lib\site-packages\django\utils\timezone.py", line 234, in is_naive
return value.utcoffset() is None
^^^^^^^^^^^^^^^
AttributeError: 'DatabaseDefault' object has no attribute 'utcoffset'