Friday, January 28, 2011

caching of Models (not the cache middleware)

Digging into the problem I'm having with a standalone django script,
the problem seems to be that django doesn't see updates to the
database unless it writes to the database.

In the following lines,
ss = engine.SessionStore(session_id)
session=ss.load()

If session_id "abcd" has been added to the session table after the
script started, the load will not find it. Instead, it will create a
new session, say "wxyz" and write it to the table. After writing it to
the table, a subsequent load on "abcd" will succeed: it's now in sync
with the database, at least until another process writes to it.

Anyone know where this caching is happening? I have no caching
middleware enabled. Does django cache results of Model queries? Or
would the db layer be caching it? And how can I get django to sync
before looking up a session?

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