Re: [Zope-dev] Reg. persisting data in ZODB via forms
Tres Seaver <[email protected]>
| Newsgroups | gmane.comp.web.zope.bluebream,gmane.comp.web.zope.devel |
|---|---|
| Message-ID | <[email protected]> |
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 06/09/2011 06:58 AM, Laurence Rowe wrote: >> > I am not aware of the zcml configuration that can mark a class as >> > persistent. If you could explain, it would be helpful. > ZCML is not relevant here. Correct. There is no such ZCML directive. In a ZODB application, all your "model" classes normally derive from Persistent. > Deriving your class from Persistent is normally the right choice. > Storing immutable non-persistent objects such as strings, ints, floats > or tuples of them also works without surprises. Storing mutable > non-persistent objects in the ZODB is considered advanced usage and > you must inform the persistence machinery on any modification. The > best way to do this is to re-assign the non-persistent object to it's > parent persistent object, causing the parent to be marked as modified. FTR, you can also set the parent object's '_p_changed' attribute to a true value. Tres. - -- =================================================================== Tres Seaver +1 540-429-0999 [email protected] Palladion Software "Excellence by Design" http://palladion.com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk3wz+4ACgkQ+gerLs4ltQ565wCgu7vCM5TihUGsFhhoOYnLkiXK 2c8AoNpLdwn1Sj0m2CWtd9f7l2u1m4Yv =sG2s -----END PGP SIGNATURE-----