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Merge pull request #410 from mouse-reeve/atomicity

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Change transaction atomic to avoid cascading errors
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Mouse Reeve 2020-12-20 11:24:37 -08:00 committed by GitHub
commit fdb9b71030
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1 changed files with 32 additions and 27 deletions
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59
bookwyrm/activitypub/base_activity.py
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@ -63,7 +63,6 @@ class ActivityObject:
setattr(self, field.name, value)
@transaction.atomic
def to_model(self, model, instance=None, save=True):
''' convert from an activity to a model instance '''
if not isinstance(self, model.activity_serializer):
@ -91,13 +90,14 @@ class ActivityObject:
if not save:
return instance
# we can't set many to many and reverse fields on an unsaved object
instance.save()
with transaction.atomic():
# we can't set many to many and reverse fields on an unsaved object
instance.save()
# add many to many fields, which have to be set post-save
for field in instance.many_to_many_fields:
# mention books/users, for example
field.set_field_from_activity(instance, self)
# add many to many fields, which have to be set post-save
for field in instance.many_to_many_fields:
# mention books/users, for example
field.set_field_from_activity(instance, self)
# reversed relationships in the models
for (model_field_name, activity_field_name) in \
@ -106,20 +106,23 @@ class ActivityObject:
values = getattr(self, activity_field_name)
if values is None or values is MISSING:
continue
model_field = getattr(model, model_field_name)
try:
# this is for one to many
related_model = getattr(model, model_field_name).field.model
related_model = model_field.field.model
related_field_name = model_field.field.name
except AttributeError:
# it's a one to one or foreign key
related_model = getattr(model, model_field_name)\
.related.related_model
related_model = model_field.related.related_model
related_field_name = model_field.related.related_name
values = [values]
for item in values:
set_related_field.delay(
related_model.__name__,
instance.__class__.__name__,
instance.__class__.__name__.lower(),
related_field_name,
instance.remote_id,
item
)
@ -145,23 +148,25 @@ def set_related_field(
require_ready=True
)
if isinstance(data, str):
item = resolve_remote_id(model, data, save=False)
else:
# look for a match based on all the available data
item = model.find_existing(data)
if not item:
# create a new model instance
item = model.activity_serializer(**data)
item = item.to_model(model, save=False)
# this must exist because it's the object that triggered this function
instance = origin_model.find_existing_by_remote_id(related_remote_id)
if not instance:
raise ValueError('Invalid related remote id: %s' % related_remote_id)
with transaction.atomic():
if isinstance(data, str):
item = resolve_remote_id(model, data, save=False)
else:
# look for a match based on all the available data
item = model.find_existing(data)
if not item:
# create a new model instance
item = model.activity_serializer(**data)
item = item.to_model(model, save=False)
# this must exist because it's the object that triggered this function
instance = origin_model.find_existing_by_remote_id(related_remote_id)
if not instance:
raise ValueError(
'Invalid related remote id: %s' % related_remote_id)
# edition.parent_work = instance, for example
setattr(item, related_field_name, instance)
item.save()
# edition.parent_work = instance, for example
setattr(item, related_field_name, instance)
item.save()
def resolve_remote_id(model, remote_id, refresh=False, save=True):