pichael.py

class User(SoftDeleteModel):
  name = models.CharField(null=False, blank=False)
  
class Cat(SoftDeleteModel):
  owner = models.ForeignKey(
    User,
    null=True,
    blank=True,
    on_delete=models.SET_NULL)

ian = User.new(name='Ian')
pichael = Cat.new(name='Pichael', owner=ian)
ian.delete()

print(pichael.owner) # should print None

# Now there should be a Snapshot that looks like this:
#   { 
#     id: 1,
#     root_id: ian.id,
#     snapshot_records: [
#       { record_id: ian.id, foreign_key: null },
#       { record_id: pichael.id, foreign_key: "owner_id:{ian.id}" }
#     ]
#   }
ian.restore()
print(pichael.owner) # should be ian