Upgrade to Django 3.2 (#2056)

src/pretix/base/models/memberships.py

@@ -27,7 +27,6 @@ from django.utils.timezone import now
 from django.utils.translation import gettext_lazy as _
 from django_scopes import ScopedManager, scopes_disabled
 from i18nfield.fields import I18nCharField
-from jsonfallback.fields import FallbackJSONField
 
 from pretix.base.models import Customer
 from pretix.base.models.base import LoggedModel
@@ -59,6 +58,9 @@ class MembershipType(LoggedModel):
         null=True, blank=True,
     )
 
+    class Meta:
+        ordering = ('id',)
+
     def __str__(self):
         return str(self.name)
 
@@ -87,7 +89,7 @@ class MembershipQuerySet(models.QuerySet):
                         c=Count('*')
                     ).values('c')
                 ),
-                Value('0')
+                Value(0),
             )
         )
 
@@ -135,7 +137,7 @@ class Membership(models.Model):
     date_end = models.DateTimeField(
         verbose_name=_('End date')
     )
-    attendee_name_parts = FallbackJSONField(default=dict, null=True)
+    attendee_name_parts = models.JSONField(default=dict, null=True)
 
     objects = MembershipQuerySetManager()