Re: Locking / serializing access to one element in database

Yes, an exception will be raised. As an example, Django uses force_insert when creating sessions:

https://github.com/django/django/blob/32ef48aa562e6aaee9983f5d0f1c60f02fd555fb/django/contrib/sessions/backends/db.py#L86

On Saturday, October 24, 2015 at 2:36:15 PM UTC-4, Joakim Hove wrote:

Hi Collin;

thank you for your suggestion:

[...] if the thread thinks that the object is new, it could try using .save(force_insert=True). 

I have read to read the force_insert documentation without understanding 100%. Assume threads t1 and t2 are racing to create the first element with this primary key, and that t1 wins the race. Then when t2 issues:

    

    save( force_insert = True )

will an exception be raised?

 

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