Re: Any way to force Django to commit a write so another process can read the correct data from DB?

Hi Stodge,

As said in Django current version of documentation, 'post_delete' signal is sent after record is deleted. This means also that transaction is closed at that moment. And DB should not has deleted instance any more.

I have double checked the Django code and can say that Django send that signal just before transaction is committed.

So technically instance should be inside DB for Hibernate processing.

I can suggest you to create a custom signal and send it after transaction closed.

That should solve your problem.

Regards,

On Wed, Jul 27, 2016 at 5:27 PM, Stodge <stodge@gmail.com> wrote:

My website uses a combination of Django + Java apps to function. For this particular problem, a record is deleted from the DB via a TastyPie resource DELETE operation. A Django signal post_delete handleris invoked, which submits a DELETE request to Jetty running in the Java app. The Java app then performs a query using Hibernate.

What appears to be happening is that Django thinks the record was deleted:

DynamicVolume.objects.filter(user=instance.user).count()

Returns ZERO.

However, the Java app thinks the record still exists unless I make it sleep for several seconds before asking Hibernate to query the DB.

I've tried forcing Hibernate to clear its cache with no success. Is there a way to force Django to commit the deletion (flush the cache)?

Thanks

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