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On Saturday, August 18, 2012 7:15:37 AM UTC+2, Massimo Di Pierro wrote: > > I am pretty sure web2py does not put those variables in global namespace > but there is some extra logic for GAE that was written with some stronger > assumptions. Will take a look. > > > On Tuesday, 21 February 2012 14:54:31 UTC-6, howesc wrote: >> >> Hello all, >> >> a question about web2py and concurrent requests on GAE - I'm seeing some >> odd behavior and i would like to know if my theory is at all reasonable, >> and suggestions for testing my theory. an RTFM (read the friggen manual) >> response is just fine - can you point me to the manual? >> >> my assertion: on GAE web2py puts per-request items into the shared >> global namespace, such as db and auth. this causes problems on GAE with >> concurrency enabled because data gets clobbered. >> >> why do i believe this? well, i turned on concurrency (threadsafe: true) >> in app.yaml and after some time as the site gets loaded with real users (i >> have not run into this when testing probably because i don't generate >> enough test traffic) i see errors like: >> >> File >> "/base/data/home/apps/s~myapp/default-30a0bc01f698.356965928401701861/applications/myapp/controllers/admin_stores.py", >> line 10, in <module> >> auth.settings.actions_disabled=['profile', 'change_password'] >> NameError: name 'auth' is not defined >> >> AttributeError: 'auth_user' object has no attribute 'preferred_store' >> >> File >> "/base/data/home/apps/s~myapp/default-30a0bc01f698.356965928401701861/applications/myapp/controllers/order.py", >> line 12, in <module> >> db.store.virtualfields.append(StoreVirtualFields()) >> NameError: name 'db' is not defined >> >> >> File >> "/base/data/home/apps/s~myapp/default-30a0bc01f698.356965928401701861/applications/myapp/controllers/food.py", >> line 22, in menu >> response.title = response.title + " - Our Menu" >> TypeError: unsupported operand type(s) for +: 'NoneType' and 'str' >> >> i'd love to prove or disprove my theory that what is happening is that >> while the request that errors is being processed, db.py (and menu.py) is >> being evaluated for a second request, essentially clearing variables like >> db, auth, and perhaps even response (the None response.title when >> response.title is set in menu.py is most concerning). >> >> i admit to not fully understanding how the run_X_in_environment(), and >> build_environment() and python variable scoping works well enough to know >> if my theory is valid and how best to test my theory? i've thought about >> putting a sleep in db.py just to see if i can reliably re-create this type >> of behaviour. >> >> any thoughts? >> >> thanks, >> >> christian >> >> -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
