I had a similar problem with one of my apps.
I solved it by using @db.transactional
e.g.
@db.transactional
def update_program(program_data):
# Using transactional to ensure that DB is consistent before displaying
programs again
program_data.put()
Then, whenever I need to update program_data before redirecting to a page,
call update_program(program_data) where program_data is a reference to a
db.Model instance
Hope this helps,
Julie
On 20 April 2013 04:11, Vinny P <[email protected]> wrote:
>
> On Thursday, April 18, 2013 1:27:00 AM UTC-5, Nijin Narayanan wrote:
>>
>> The Page is redirecting after the datastore operation performed.
>> Something like this:
>>
>> db.delete(key)
>>
>> self.redirect(new_page)
>>
>> Does this will redirect the page before completing the delete operation ?
>>
>>
> The answer is a resounding and firm "Maybe".
>
> Operations on the datastore take place in two parts: the commit phase, and
> the apply phase. You can read more about it at
> https://developers.google.com/appengine/docs/python/datastore/overview#Datastore_Writes_and_Data_Visibility
> but
> the short version is that datastore operations return after the commit
> phase, not after the apply phase. You may have told the datastore to delete
> an object, but it'll take some milliseconds for that operation to execute
> even after the delete op has returned.
>
> You might need to add an artificial delay to your code, or manually
> account for its' deletion.
>
>
> -----------------
> -Vinny P
> Technology & Media Advisor
> Chicago, IL
>
>
>
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