added cleareventdata management command

src/c3nav/mapdata/management/commands/cleareventdata.py

@@ -0,0 +1,70 @@
+import logging
+
+from django.core import management
+from django.core.exceptions import ObjectDoesNotExist
+from django.core.management import BaseCommand
+
+from c3nav.mapdata.management.commands import clearmapcache
+
+
+class Command(BaseCommand):
+    help = 'Wipes users, changesets and mapupdates to reset a instance'
+
+    def add_arguments(self, parser):
+        parser.add_argument('--yes', action='store_const', const=True, default=False,
+                            help='really delete it')
+
+    def handle(self, *args, **options):
+        from c3nav.control.models import UserPermissions
+        from c3nav.mapdata.models import MapUpdate
+        from c3nav.mapdata.models.access import AccessPermissionToken
+        from c3nav.editor.models import ChangeSet, ChangeSetUpdate
+        from c3nav.site.models import Announcement
+        from django.contrib.auth import get_user_model
+
+        logger = logging.getLogger('c3nav')
+
+        if not options['yes']:
+            print("please add --yes to confirm that you really want to delete all users, changesets, and mapupdates")
+            return
+
+        try:
+            ChangeSet.objects.all().delete()
+            logger.info('Deleted all ChangeSets')
+        except ObjectDoesNotExist:
+            pass
+        try:
+            # should not be necessary, but just to make sure
+            ChangeSetUpdate.objects.all().delete()
+            logger.info('Deleted all ChangeSetsUpdates')
+        except ObjectDoesNotExist:
+            pass
+        try:
+            MapUpdate.objects.all().delete()
+            logger.info('Deleted all MapUpdates')
+        except ObjectDoesNotExist:
+            pass
+
+        try:
+            AccessPermissionToken.objects.all().delete()
+            logger.info('Deleted all AccessPermissionTokens')
+        except ObjectDoesNotExist:
+            pass
+        try:
+            Announcement.objects.filter(author__is_superuser=False).delete()
+            logger.info('Deleted all Announcements nor attached to a super user')
+        except ObjectDoesNotExist:
+            pass
+        try:
+            UserPermissions.objects.filter(user__is_superuser=False).delete()
+            logger.info('Deleted all UserPermissions not attached to a super user')
+        except ObjectDoesNotExist:
+            pass
+
+        try:
+            get_user_model().objects.filter(is_superuser=False).delete()
+            logger.info('Deleted all Users who are not a super user')
+        except ObjectDoesNotExist:
+            pass
+
+        management.call_command(clearmapcache.Command(), include_history=True, include_geometries=True)

src/c3nav/mapdata/models/update.py

@@ -130,7 +130,11 @@ class MapUpdate(models.Model):
 
                 logger.info('%.3f m² of altitude areas affected.' % changed_geometries.area)
 
-                last_processed_update = cls.objects.filter(processed=True).latest().to_tuple
+                try:
+                    last_processed_update = cls.objects.filter(processed=True).latest().to_tuple
+                except cls.DoesNotExist:
+                    last_processed_update = (0, 0)
+                    cache.set('mapdata:last_processed_update', last_processed_update, None)
 
                 for new_update in new_updates:
                     logger.info('Applying changed geometries from MapUpdate #%(id)s (%(type)s)...' %