Dumpdata - does not work (for Meagen)

dumpdata.sh

@@ -0,0 +1 @@
+./manage.py dumpdata --format yaml -e auth.user -e wagtailcore.revision -e wagtailcore.referenceindex -e wagtailsearch.indexentry -e newsletter.newsletteremailaddress -e images.wagtailiorendition -e wagtailsearchpromotions.query -e wagtailsearchpromotions.querydailyhits -e wagtailcore.pagelogentry -e sessions.session -e packages.package -e packages.grid -e wagtailredirects.redirect -e wagtailcore.pagesubscription -e wagtailcore.pageviewrestriction -e wagtailcore.grouppagepermission -e wagtailcore.modellogentry > wagtailio/core/fixtures/initial_data.yaml

wagtailio/core/management/commands/load_initial_data.py

@@ -0,0 +1,22 @@
+from django.contrib.auth.models import Group, Permission
+from django.contrib.contenttypes.models import ContentType
+from django.core.management import call_command
+from django.core.management.base import BaseCommand
+from django.db import transaction
+
+from wagtail.models import Page, Site
+
+
+class Command(BaseCommand):
+    help = "Load initial data for the Wagtail.org project"
+
+    @transaction.atomic
+    def handle(self, *args, **options):
+        Site.objects.all().delete()
+        Page.objects.all().delete()
+        Permission.objects.all().delete()
+        Group.objects.all().delete()
+        ContentType.objects.all().delete()
+
+        call_command("loaddata", "initial_data")
+        self.stdout.write(self.style.SUCCESS("Successfully loaded initial data"))