-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I did some tests a year ago about upgrading to 2.13.19. I use ExtFile/ExtImage extensively and I had to patch it a bit. I hit the problem that ExtFile tries to import "from Shared.DC.ZRDB.TM import TM". Messing around a bit, I solved the issue installing "Products.ZSQLMethods" product (via <https://mail.zope.org/pipermail/zope/2012-January/176324.html>), but this is not working with 2.13.21. I am getting tons of upgrade warnings about zope packages. The documentation for "Products/ExtFile/TM.py" says this: """ TMRegistry and ProxyTM Use case - -------- Persistent objects (ExtFiles) need to participate in ZODB transactions. ExtFiles perform all operations using temporary files which are saved on commit or deleted on abort. Constraints - ----------- - - TransactionManagers (TM) must not be persistent themselves, i.e. must not have a _p_jar attribute. - - We have to make sure the ExtFile's _abort is called *before* the ZODB destroys the attributes of the persistent object. Solution - -------- - - ProxyTM is a subclass of TM.TM that keeps a (hard) reference to the (wrapped) persistent object it manages. Calls to _begin, _finish, and _abort are forwarded to the target object. - - TMRegistry is a module-level container for ProxyTMs. It creates and holds ProxyTMs keyed by (target_id, thread_id). - - ExtFiles implement _finish and _abort and register with the machinery by calling TM.register(self). - - On commit (or abort) the ProxyTM notifies its target object and removes itself from the registry. Hacks - ----- - - We manipulate the transaction's _resources attribute directly. This is to guarantee the ProxyTM is processed before other resources. There may be a way to achieve this using official APIs only, but I can't seem to find one. """ How can I solve this?. Is there any product similar to ExtFile/ExtImage? I can program Python if somebody guides me around the zope2 internal details... - -- Jesús Cea Avión _/_/ _/_/_/ _/_/_/ jcea@jcea.es - http://www.jcea.es/ _/_/ _/_/ _/_/ _/_/ _/_/ Twitter: @jcea _/_/ _/_/ _/_/_/_/_/ jabber / xmpp:jcea@jabber.org _/_/ _/_/ _/_/ _/_/ _/_/ "Things are not so easy" _/_/ _/_/ _/_/ _/_/ _/_/ _/_/ "My name is Dump, Core Dump" _/_/_/ _/_/_/ _/_/ _/_/ "El amor es poner tu felicidad en la felicidad de otro" - Leibniz -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.15 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQCVAwUBUobdLJlgi5GaxT1NAQJCbgP/cjU/H48QqZar3/quLDGRdTEBt+5uhIve zf5SLjWnDDqcDQ0UgEhDm7BbAFC4wLDFL8TV0sP7+jCIrvqT/1P9IXUXJ13o9flV dW2ni1DILG2zD4G3pES9OQKcMyaoXeZT3/JYwB/KD+TXEnDkek1zCxwRAAdRWveh PeTL6HCbrWU= =P7r7 -----END PGP SIGNATURE-----