[Zope-DB] Zope database connectivity
dieter at handshake.de
Sun Sep 24 13:48:39 EDT 2006
Maciej Wisniowski wrote at 2006-9-23 00:27 +0200:
> > You could recode DA's to close the connection at the end of every
> > transaction and reopen them on demand,
>Seems for me that difference betwen "connect on load"
>and "connect on demand" is in _begin, _finish and
>__init__ methods of TransactionManager (usually defined in db.py
>in specific database adapter).
The bad behaviour is in standard Zope code:
It connects to the database as soon as the instance is loaded from
ZODB. My modified code looks like:
def __setstate__(self, state):
# DM 2005-06-24: what a stupidity to connect on load!
# It should be delayed until the connections is really used.
# I do not change this here to not break DAs.
# DM 2005-06-24: "connect_" in order to protect '_v_' attributes
'Error connecting to relational database.',
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