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Recovering [deleted]{style="color: #fd5765"} Wagtail pages and Django models
Jake Howard
- Senior Systems Engineer @ Torchbox
- Security Team & Performance Working Group @ Wagtail
- theorangeone.net
- @RealOrangeOne
- @RealOrangeOne
- @jake@theorangeone.net
Setting the scene
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Site history report
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Restoring from backups
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Partial restores from backups
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1.
Spin up a database backup
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2.
Locate the page models
from wagtail.models import Page
sysadmin_page = Page.objects.get(id=91)
child_pages = sysadmin_page.get_descendants()
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3.
Locate what was deleted
from django.contrib.admin.utils import NestedObjects
collector = NestedObjects()
collector.collect(list(child_pages) + [sysadmin_page])
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4. Serialize
from django.core import serializers
class NoM2MSerializer(Serializer):
def handle_m2m_field(self, obj, field):
pass
def get_model_instances():
for qs in collector.data.values():
yield from qs
with open("deleted-models.json", "w") as f:
NoM2MSerializer().serialize(
get_model_instances(),
stream=f
)
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4a.
Deserialize
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restore-deleted-pages.py
from django.contrib.admin.utils import NestedObjects
from django.core import serializers
from wagtail.models import Page
class NoM2MSerializer(Serializer):
def handle_m2m_field(self, obj, field):
pass
sysadmin_page = Page.objects.get(id=91)
child_pages = sysadmin_page.get_descendants()
collector = NestedObjects()
collector.collect(list(child_pages) + [sysadmin_page])
def get_model_instances():
for qs in collector.data.values():
yield from qs
with open("deleted-models.json", "w") as f:
NoM2MSerializer().serialize(
get_model_instances(),
stream=f
)
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5.
Test
Test
Test!
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6.
Showtime!
Conclusion
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