The model is very simple here.
class table(db.Model)
atime=db.DateTimeProperty(auto_now=True)
data=db.BlobProperty()
I want to have function simply delete data older than a certain time.
Is it safe to use just
db.delete(table.all().filter('atime <', expire_time).fetch(100))
or do I have to do it like this
def txn():
old = table.all().filter('atime <', expire_time).get()
if old is not None:
old.delete()
return True
return False
while run_in_transaction(txn): pass
My concern is that the first method may delete an entry is being
updated. The second method seems very inefficient.
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