django(conf): add workaround for SmileyChris/django-countries#438

config/settings.py

@@ -14,6 +14,8 @@
 from datetime import UTC, datetime
 from pathlib import Path
 
+from django_countries.widgets import LazyChoicesMixin
+
 # Build paths inside the project like this: os.path.join(BASE_DIR, ...)
 BASE_DIR = Path(__file__).resolve().parent.parent
 
@@ -139,3 +141,7 @@
 PPL_START_DATE = datetime(2021, 12, 1, 0, 0, tzinfo=UTC)
 PPL_END_DATE = datetime(2022, 1, 29, 0, 0, tzinfo=UTC)
 CPL_START_DATE = datetime.now(tz=UTC)
+
+# https://github.com/SmileyChris/django-countries/pull/438
+LazyChoicesMixin.get_choices = lambda self: self._choices
+LazyChoicesMixin.choices = property(LazyChoicesMixin.get_choices, LazyChoicesMixin.set_choices)