Address form: Add missing province Aosta for Italy (#5796)

src/pretix/base/settings.py

@@ -76,7 +76,7 @@ from pretix.base.validators import multimail_validate
 from pretix.control.forms import (
     ExtFileField, FontSelect, MultipleLanguagesWidget, SingleLanguageWidget,
 )
-from pretix.helpers.countries import CachedCountries
+from pretix.helpers.countries import CachedCountries, pycountry_add
 
 ROUNDING_MODES = (
     ('line', _('Compute taxes for every line individually')),
@@ -3914,7 +3914,7 @@ COUNTRIES_WITH_STATE_IN_ADDRESS = {
     'MX': (['State', 'Federal district', 'Federal entity'], 'short'),
     'US': (['State', 'Outlying area', 'District'], 'short'),
     'IT': (['Province', 'Free municipal consortium', 'Metropolitan city', 'Autonomous province',
-            'Free municipal consortium', 'Decentralized regional entity'], 'short'),
+            'Decentralized regional entity'], 'short'),
 }
 COUNTRY_STATE_LABEL = {
     # Countries in which the "State" field should not be called "State"
@@ -3922,6 +3922,8 @@ COUNTRY_STATE_LABEL = {
     'JP': pgettext_lazy('address', 'Prefecture'),
     'IT': pgettext_lazy('address', 'Province'),
 }
+# Workaround for https://github.com/pretix/pretix/issues/5796
+pycountry_add(pycountry.subdivisions, code="IT-AO", country_code="IT", name="Valle d'Aosta", parent="23", parent_code="IT-23", type="Province")
 
 settings_hierarkey = Hierarkey(attribute_name='settings')
 

src/pretix/helpers/countries.py

@@ -136,3 +136,16 @@ custom_translations = [
     gettext_noop("North Macedonia"),
     gettext_noop("Macao"),
 ]
+
+
+def pycountry_add(db, **kw):
+    # Workaround for https://github.com/pycountry/pycountry/issues/281
+    db._load()
+    obj = db.factory(**kw)
+    db.objects.append(obj)
+    for key, value in kw.items():
+        if key in db.no_index:
+            continue
+        value = value.lower()
+        index = db.indices.setdefault(key, {})
+        index.setdefault(value, set()).add(obj)