> -----Original Message-----
> From: sqlalchemy@googlegroups.com [mailto:sqlalchemy@googlegroups.com]
> On Behalf Of Eduardo
> Sent: 18 July 2011 14:12
> To: sqlalchemy
> Subject: [sqlalchemy] Re: information about filed create_engine
>
> I dont get any log. The access strings from the local and wsgi
> applications are identical so the script should connect to the same
> database. I encountered problems with create_engine. What type of
> exception can this method throw?
> The application catches: TypeError, ValueError and OperationalError.
> Is there any other Error or some universal sqlalchemy error that can
> indicate me where the problem is?
> Thanks
>
I'm sorry - I still don't understand your setup. How do you know that
you've "encountered problems with create_engine" if you're not getting
any kind of exception from it?
If you really think that create_engine is failing but the exception is
being caught silently, why not change your code so that you've got an
exception handler around create_engine:
try:
engine = create_engine(your_connection_string)
except Exception, e:
import traceback
log_file = open('/tmp/sqlalchemy_errors', 'w+')
log_file.write('Exception from create_engine\n')
log_file.write('%s\n' % e)
log_file.write(traceback.format_exc())
raise
But your life would be much easier if you learnt how to configure
SQLAlchemy's built-in logging features:
http://www.sqlalchemy.org/docs/core/engines.html#configuring-logging
What WSGI server and web framework are you using (if any)? It sounds
like they are hampering your efforts to debug this. You might find it
easier to run a very simple wsgi server such as the one in the wsgiref
module:
http://docs.python.org/library/wsgiref.html#module-wsgiref.simple_server
Simon
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