Pier Luigi Fiorini schrieb:
Hello,
I'm developing a Zope application that uses a PostgreSQL connection and
several ZSQL objects.
People should log in using a Postgres user and ZSQL object should be executed
by the user that's logged in. Multiple people can be logged at the same time.
Unfortunately it is not possible because the same Postgres connection is used
by all the ZSQL object. Is there a way to change the user executing a ZSQL
query?
Well good news and bad news...
Good news first:
yes it can be done
Bad news:
you would have to code it ;)
You could base on the database adapter you currently
have but organize your connection pool on a per
user basis - so you need a connection with
a user-folder as well (Interesting
if you could subclass Userfolder and PsycopgDA...)
so when a user logs in you look in the connection
pool and/or authorize the user and use an idle/new
connection for this user when ZSQL methods are called.
Interesting project but not so easy.
Also in worst case you could end up having
zope-threads X users connection to your database.
And connection setup is somewhat expensive,
so if your pool is too small performance will suffer.
Regards
Tino
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