Default scope of variables
Ian Kelly
ian.g.kelly at gmail.com
Tue Jul 9 03:56:29 EDT 2013
On Tue, Jul 9, 2013 at 1:35 AM, Frank Millman <frank at chagford.com> wrote:
> When any of them need any database access, whether for reading or for
> updating, they execute the following -
>
> with db_session as conn:
> conn.transaction_active = True # this line must be added if
> updating
> conn.cur.execute(__whatever__)
I'd probably factor out the transaction_active line into a separate
DbSession method.
@contextmanager
def updating(self):
with self as conn:
conn.transaction_active = True
yield conn
Then you can do "with db_session" if you're merely reading, or "with
db_session.updating()" if you're writing, and you don't need to repeat
the transaction_active line all over the place.
I would also probably make db_session a factory function instead of a global.
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