Getting a "Handle" to a ZODB object to store in another object
Hi all, I would like to have an object in one folder be referenced by another object in another folder (think symlinks in UNIX) ... but I'm not sure what properties an object has that identify it's absolute location (absolute_url is a little fluffy, no?). Anyone have any ideas on how to approach this? Thanks in advance, Ziniti
On Wednesday 28 November 2001 06:06 pm, John Ziniti allegedly wrote:
Hi all,
I would like to have an object in one folder be referenced by another object in another folder (think symlinks in UNIX) ... but I'm not sure what properties an object has that identify it's absolute location (absolute_url is a little fluffy, no?).
Anyone have any ideas on how to approach this?
Thanks in advance,
Ziniti
I think Chris M. alludes to this, but it is actually trivial to "mount" an object in multiple places in the ZODB. However, the two objects will need to have the same id, due to the way Zope objects currently identify themselves. It is theoretically possible for infinite acquisition loops to happen I think too, so if your Zope instance turns into a black hole and swallows the entire universe, don't say you haven't been warned. 8^) Here is the code, which could be put into an external method, folder is any folderish object decending from ObjectManager: from Acquisition import aq_base def mountAgain(object, folder): folder._setObject(object.getId(), aq_base(object), set_owner=0) If the objects in question are not "full Zope objects", that is they do not show as individual objects in the ZMI, then you can do as Chris suggests and just reference the object from another place. hth, /---------------------------------------------------\ Casey Duncan, Sr. Web Developer National Legal Aid and Defender Association c.duncan@nlada.org \---------------------------------------------------/
There's also zopelabs recipe that may be what he wants... http://www.zopelabs.com/cookbook/1003844578 On Thu, 2001-11-29 at 08:55, Casey Duncan wrote:
On Wednesday 28 November 2001 06:06 pm, John Ziniti allegedly wrote:
Hi all,
I would like to have an object in one folder be referenced by another object in another folder (think symlinks in UNIX) ... but I'm not sure what properties an object has that identify it's absolute location (absolute_url is a little fluffy, no?).
Anyone have any ideas on how to approach this?
Thanks in advance,
Ziniti
I think Chris M. alludes to this, but it is actually trivial to "mount" an object in multiple places in the ZODB. However, the two objects will need to have the same id, due to the way Zope objects currently identify themselves.
It is theoretically possible for infinite acquisition loops to happen I think too, so if your Zope instance turns into a black hole and swallows the entire universe, don't say you haven't been warned. 8^)
Here is the code, which could be put into an external method, folder is any folderish object decending from ObjectManager:
from Acquisition import aq_base def mountAgain(object, folder): folder._setObject(object.getId(), aq_base(object), set_owner=0)
If the objects in question are not "full Zope objects", that is they do not show as individual objects in the ZMI, then you can do as Chris suggests and just reference the object from another place.
hth, /---------------------------------------------------\ Casey Duncan, Sr. Web Developer National Legal Aid and Defender Association c.duncan@nlada.org \---------------------------------------------------/
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participants (3)
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Casey Duncan -
John Ziniti -
Tom Jenkins