[ZODB-Dev] Getting an up to date instance of a persistent object

[Pascal Peregrina]

Hi,

I have a question regarding what triggers the reloading of an object
state from ZODB (in order to set the most up to date one).

(note that I use ZEO)

Say you have C1, a Connection, and you have already retrieved object O1
(so O1 is in C1 cache).
Then, O1 is modified by something (that uses a different Connection).

When you reuse C1 and access O1, I would like to know what makes sure
the O1 state is up to date.

Apparently, accessing O1._p_serial before anything else returns the old
serial (so the latest state has not been set). I also tried C1.sync()
(through O1._p_jar) before accessing O1._p_serial but I got same result.

And apparently, accessing O1._p_mitme before anything else does return
the latest mtime and then accessing O1._p_serial does return the latest
serial (so the latest state has been set)

Is that right? What's the rule?

Thanks for your help.

Pascal


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