BIG UPD: migrate to python 3.10 and django 3.2

dav_events/models/event.py

@@ -10,10 +10,9 @@ import unicodedata
 from babel.dates import format_date
 from django.conf import settings
 from django.contrib.auth import get_user_model
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 from django.db import models
 from django.template.loader import get_template
-from django.utils.encoding import python_2_unicode_compatible
 from django.utils.translation import get_language, ugettext_lazy as _
 from django_countries.fields import Country, CountryField
 
@@ -27,7 +26,6 @@ from .eventchange import EventChange
 logger = logging.getLogger(__name__)
 
 
-@python_2_unicode_compatible
 class Event(models.Model):
     # Metadata
     owner = models.ForeignKey(settings.AUTH_USER_MODEL,

dav_events/models/eventchange.py

@@ -3,7 +3,6 @@ from __future__ import unicode_literals
 from django.conf import settings
 from django.db import models
 from django.utils import timezone
-from django.utils.encoding import python_2_unicode_compatible
 
 from . import get_ghost_user, get_system_user
 
@@ -12,7 +11,6 @@ def get_system_user_id():
     return get_system_user().id
 
 
-@python_2_unicode_compatible
 class EventChange(models.Model):
     UPDATE = 'update'
     RAISE_FLAG = 'set_flag'
@@ -23,7 +21,7 @@ class EventChange(models.Model):
         (LOWER_FLAG, 'Lower Flag'),
     )
 
-    event = models.ForeignKey('dav_events.Event', related_name='changes')
+    event = models.ForeignKey('dav_events.Event', related_name='changes', on_delete=models.CASCADE)
     timestamp = models.DateTimeField(default=timezone.now)
     user = models.ForeignKey(settings.AUTH_USER_MODEL,
                              default=get_system_user_id,

dav_events/models/eventflag.py

@@ -2,7 +2,6 @@ from __future__ import unicode_literals
 from django.conf import settings
 from django.db import models
 from django.utils import timezone
-from django.utils.encoding import python_2_unicode_compatible
 
 from . import get_ghost_user, get_system_user
 
@@ -11,9 +10,8 @@ def get_system_user_id():
     return get_system_user().id
 
 
-@python_2_unicode_compatible
 class EventFlag(models.Model):
-    event = models.ForeignKey('dav_events.Event', related_name='flags')
+    event = models.ForeignKey('dav_events.Event', related_name='flags', on_delete=models.CASCADE)
     status = models.ForeignKey('dav_events.EventStatus',
                                on_delete=models.PROTECT,
                                related_name='+')

dav_events/models/eventstatus.py

@@ -1,6 +1,5 @@
 from __future__ import unicode_literals
 from django.db import models
-from django.utils.encoding import python_2_unicode_compatible
 from django.utils.translation import ugettext_lazy as _
 
 from ..validators import IdStringValidator
@@ -22,7 +21,6 @@ BOOTSTRAP_CONTEXT_CHOICES = (
 )
 
 
-@python_2_unicode_compatible
 class EventStatus(models.Model):
     code = models.CharField(primary_key=True, max_length=254, validators=[IdStringValidator])
     severity = models.IntegerField(unique=True)

dav_events/models/oneclickaction.py

@@ -3,10 +3,9 @@ from __future__ import unicode_literals
 import logging
 import uuid
 from django.contrib.auth import get_user_model
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 from django.db import models
 from django.utils import timezone
-from django.utils.encoding import python_2_unicode_compatible
 from django.utils.translation import ugettext, ugettext_lazy as _
 
 from .event import Event
@@ -14,7 +13,6 @@ from .event import Event
 logger = logging.getLogger(__name__)
 
 
-@python_2_unicode_compatible
 class OneClickAction(models.Model):
     COMMANDS = (
         ('EVENT_LIST', 'login and go to event list (user id)'),

dav_events/models/participant.py

@@ -4,7 +4,6 @@ import datetime
 from django.core.exceptions import ValidationError
 from django.db import models
 from django.utils import timezone
-from django.utils.encoding import python_2_unicode_compatible
 from django.utils.translation import ugettext_lazy as _
 
 from dav_base.validators import DAVNumberValidator
@@ -12,7 +11,6 @@ from dav_base.validators import DAVNumberValidator
 midnight = datetime.time(00, 00, 00)
 
 
-@python_2_unicode_compatible
 class AbstractParticipant(models.Model):
     personal_names = models.CharField(max_length=1024,
                                       verbose_name=_('Vorname(n)'))
@@ -158,9 +156,8 @@ class AbstractParticipant(models.Model):
         return timezone.make_aware(datetime.datetime.combine(purge_date, midnight))
 
 
-@python_2_unicode_compatible
 class Participant(AbstractParticipant):
-    event = models.ForeignKey('Event', related_name='participants')
+    event = models.ForeignKey('Event', related_name='participants', on_delete=models.PROTECT)
     created_at = models.DateTimeField(auto_now_add=True)
     position = models.IntegerField(verbose_name='Listennummer')
 

dav_events/models/trash/trashed_participant.py

@@ -1,15 +1,13 @@
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 from django.db import models
-from django.utils.encoding import python_2_unicode_compatible
 from django.utils.translation import ugettext_lazy as _
 
 from ..participant import AbstractParticipant
 
 
-@python_2_unicode_compatible
 class TrashedParticipant(AbstractParticipant):
-    event = models.ForeignKey('Event', related_name='trashed_participants')
+    event = models.ForeignKey('Event', related_name='trashed_participants', on_delete=models.CASCADE)
     created_at = models.DateTimeField()
     trashed_at = models.DateTimeField(auto_now_add=True)
     position = models.IntegerField(verbose_name='Listennummer')