Re: [Zope] Need some help to get rid of an InvalidObjectReference exception
chaouche yacine wrote at 2008-8-20 01:52 -0700: ... How do I know to which ZODB a specific object belongs to ? A persistent object has the attribute _p_jar. This attribute is None when the object was not loaded from the ZODB and otherwise, it is the ZODB connection which has loaded it. A ZODB connection has the method db() (or similar) which returns the ZODB database this connection belongs to. More details in the source (ZODB.DB and ZODB.Connection). -- Dieter ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Need some help to get rid of an InvalidObjectReference exception
chaouche yacine wrote at 2008-8-20 05:21 -0700: ... Ok here's how I did to finally fix it : * create a new Transient Object Container (sessionTOC) at root * create a new Session Data Manager (sessionDM), with the following settings : ** Id : sessionDM ** Transient Object Container Path : /sessionTOC ** Place SESSION in REQUEST object as : ZODBSESSION Now I can put ZODB objects in ZODBSESSION using something like : context.REQUEST.ZODBSESSION.set(object,o) Thanks to all of you for your precious help. I already know that you have abandoned this approach already (good). What you did: you have put the sessions into the main ZODB storage. The ZODB can have the same persistent object at different places in the persistent graph. *HOWEVER* Zope usually does not like its (what I call site building) objects to be at different places. This means, that templates and scripts behave quite differently (their container changes and maybe their context) dependent on the location from which they have been fetched. Do not put templates/scripts at secondary positions in the ZODB (use just a single primary position). Use instead references (e.g. paths) to the templates/scripts and resolve the references to the real objects. -- Dieter ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Need some help to get rid of an InvalidObjectReference exception
Yes this could be dangerous, but in my case these volatile attributes need not to be in the cache for a very long time, it's just a matter of 3 or 4 clicks in about half a dozen of minutes. But yeah, I'll really have to be careful about that, or to recreate them if they're gone (hence the setattr and getattr to make sure there's something in self._v_something and create one if there's not) Ok, I changed my mind again ^_^. Volatile attributes are shared across multiple sessions, which is not acceptable for my application. So here's what I cam up with : * 1 : Do not store references to a ZODBish object into a non ZODBish object * And 2 : just pass the context as a parameter to all the non-ZODBish methods that need it. I Tried to avoid this in the first place (hence storing it as an attribute), but putting them in the session broke everything. Cheers. ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Need some help to get rid of an InvalidObjectReference exception
Need some help to get rid of an InvalidObjectReference exception In my zope product, when I try to put some specific object in the session, I get this : 2008-08-18T14:51:02 ERROR(200) SiteError http://www.afdas.com:8091/noyauafdas/tests/testAdresses Traceback (most recent call last): File /opt/Zope-2.7/lib/python/ZPublisher/Publish.py, line 107, in publish transactions_manager.commit() File /opt/Zope-2.7/lib/python/Zope/App/startup.py, line 222, in commit get_transaction().commit() File /opt/Zope-2.7/lib/python/ZODB/Transaction.py, line 241, in commit ncommitted += self._commit_objects(objects) File /opt/Zope-2.7/lib/python/ZODB/Transaction.py, line 356, in _commit_objects jar.commit(o, self) File /opt/Zope-2.7/lib/python/ZODB/Connection.py, line 452, in commit dump(state) InvalidObjectReference: Attempt to store an object from a foreign database connection A given persistent object can only be in one (ZODB-) database, not in several databases at the same time. You must copy the persistent object, when you want it to be stored (also) in another (ZODB-) database. You can use the _getCopy(destination) method to create such a copy. _getCopy is defined by OFS.CopySupport.CopySource inherited by most Zope objects. -- Dieter Well if it is the case, I didn't do it on purpose because I didn't use any specific ZODB code to copy objects on different ZODBs. How do I know to which ZODB a specific object belongs to ? ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Need some help to get rid of an InvalidObjectReference exception
--- On Tue, 8/19/08, Dieter Maurer [EMAIL PROTECTED] wrote:
From: Dieter Maurer [EMAIL PROTECTED]
Subject: Re: [Zope] Need some help to get rid of an InvalidObjectReference
exception
To: [EMAIL PROTECTED]
Cc: zope@zope.org
Date: Tuesday, August 19, 2008, 11:16 AM
chaouche yacine wrote at 2008-8-18 09:50 -0700:
Need some help to get rid of an InvalidObjectReference
exception
In my zope product, when I try to put some specific
object in the session, I get this :
2008-08-18T14:51:02 ERROR(200) SiteError
http://www.afdas.com:8091/noyauafdas/tests/testAdresses
Traceback (most recent call last):
File
/opt/Zope-2.7/lib/python/ZPublisher/Publish.py,
line 107, in publish
transactions_manager.commit()
File
/opt/Zope-2.7/lib/python/Zope/App/startup.py,
line 222, in commit
get_transaction().commit()
File
/opt/Zope-2.7/lib/python/ZODB/Transaction.py,
line 241, in commit
ncommitted += self._commit_objects(objects)
File
/opt/Zope-2.7/lib/python/ZODB/Transaction.py,
line 356, in _commit_objects
jar.commit(o, self)
File
/opt/Zope-2.7/lib/python/ZODB/Connection.py,
line 452, in commit
dump(state)
InvalidObjectReference: Attempt to store an object from
a foreign database connection
A given persistent object can only be in one (ZODB-)
database, not in several
databases at the same time.
You must copy the persistent object, when you want it to be
stored
(also) in another (ZODB-) database.
You can use the _getCopy(destination) method to
create such
a copy. _getCopy is defined by
OFS.CopySupport.CopySource inherited
by most Zope objects.
--
Dieter
I narrowed the code to what is necessary to fire this exception, and here is
the tarball for those who want to test it live
http://yacinechaouche.googlepages.com/InvalidObjectReferenceExample.tgz
This is the directory contents :
+ InvalidObjectReferenceExample
\_ __init__.py
\_ NonZODBObject.py
\_+ zmi
\_ ZODBLivingObjectAddForm.pt
\_ ZODBLivingObject.py
NonZODBObject.py
class NonZODBObject:
Hello, i do not live in the ZODB
def __init__(self,p_context):
# This is the evil line.
self.context = p_context
===
ZODBLivingObject.py
===
from OFS.SimpleItem import SimpleItem
from NonZODBObject import NonZODBObject
class ZODBLivingObject(SimpleItem) :
Hello, I live in the ZODB.
meta_type = ZODBish
def __init__(self):
self.id = ZODBish
self.title = ZODBish
def breakEverything(self):
nonZODBish = NonZODBObject(self)
# This line breaks everything.
self.REQUEST.SESSION.set('breakish',nonZODBish)
# This can be seen in the console if runzope
print it's me,nonZODBish.context
return nonZODBish.context
__init__.py contains the code necessary to create a ZODBish in the ZODB through
the ZMI
zmi contains the form that adds a ZODBish through the ZMI
As you see, I do not intentionally copy objects from one ZODB to another...
Except maybe if the session has a separate storage and that this breaks
everything. But then, I could not even use the _getCopy method because
nonZODBish do not have a _p_jar attribute.
Any help or comment would be appreciated .
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Re: [Zope] Need some help to get rid of an InvalidObjectReference exception
--- On Wed, 8/20/08, chaouche yacine [EMAIL PROTECTED] wrote:
From: chaouche yacine [EMAIL PROTECTED]
Subject: Re: [Zope] Need some help to get rid of an InvalidObjectReference
exception
To: Dieter Maurer [EMAIL PROTECTED]
Cc: zope@zope.org
Date: Wednesday, August 20, 2008, 3:22 AM
--- On Tue, 8/19/08, Dieter Maurer
[EMAIL PROTECTED] wrote:
From: Dieter Maurer [EMAIL PROTECTED]
Subject: Re: [Zope] Need some help to get rid of an
InvalidObjectReference exception
To: [EMAIL PROTECTED]
Cc: zope@zope.org
Date: Tuesday, August 19, 2008, 11:16 AM
chaouche yacine wrote at 2008-8-18 09:50 -0700:
Need some help to get rid of an
InvalidObjectReference
exception
In my zope product, when I try to put some
specific
object in the session, I get this :
2008-08-18T14:51:02 ERROR(200) SiteError
http://www.afdas.com:8091/noyauafdas/tests/testAdresses
Traceback (most recent call last):
File
/opt/Zope-2.7/lib/python/ZPublisher/Publish.py,
line 107, in publish
transactions_manager.commit()
File
/opt/Zope-2.7/lib/python/Zope/App/startup.py,
line 222, in commit
get_transaction().commit()
File
/opt/Zope-2.7/lib/python/ZODB/Transaction.py,
line 241, in commit
ncommitted += self._commit_objects(objects)
File
/opt/Zope-2.7/lib/python/ZODB/Transaction.py,
line 356, in _commit_objects
jar.commit(o, self)
File
/opt/Zope-2.7/lib/python/ZODB/Connection.py,
line 452, in commit
dump(state)
InvalidObjectReference: Attempt to store an object
from
a foreign database connection
A given persistent object can only be in one (ZODB-)
database, not in several
databases at the same time.
You must copy the persistent object, when you want it
to be
stored
(also) in another (ZODB-) database.
You can use the _getCopy(destination)
method to
create such
a copy. _getCopy is defined by
OFS.CopySupport.CopySource inherited
by most Zope objects.
--
Dieter
I narrowed the code to what is necessary to fire this
exception, and here is the tarball for those who want to
test it live
http://yacinechaouche.googlepages.com/InvalidObjectReferenceExample.tgz
This is the directory contents :
+ InvalidObjectReferenceExample
\_ __init__.py
\_ NonZODBObject.py
\_+ zmi
\_ ZODBLivingObjectAddForm.pt
\_ ZODBLivingObject.py
NonZODBObject.py
class NonZODBObject:
Hello, i do not live in the ZODB
def __init__(self,p_context):
# This is the evil line.
self.context = p_context
===
ZODBLivingObject.py
===
from OFS.SimpleItem import SimpleItem
from NonZODBObject import NonZODBObject
class ZODBLivingObject(SimpleItem) :
Hello, I live in the ZODB.
meta_type = ZODBish
def __init__(self):
self.id = ZODBish
self.title = ZODBish
def breakEverything(self):
nonZODBish = NonZODBObject(self)
# This line breaks everything.
self.REQUEST.SESSION.set('breakish',nonZODBish)
# This can be seen in the console if runzope
print it's me,nonZODBish.context
return nonZODBish.context
__init__.py contains the code necessary to create a ZODBish
in the ZODB through the ZMI
zmi contains the form that adds a ZODBish through the ZMI
As you see, I do not intentionally copy objects from one
ZODB to another... Except maybe if the session has a
separate storage and that this breaks everything. But then,
I could not even use the _getCopy method because nonZODBish
do not have a _p_jar attribute.
Any help or comment would be appreciated .
No, I got it all wrong, it is much simpler than that : I cannot put any ZODB
living object into the session, be it a python script, a page template,
anything... this is not product specific.
So the question is now : is there another way to put some ZODB objects in the
session for future use ? because there is no reason to create the same object
twice or thrice in my product so I want it to stay in the session.
Thanks.
___
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Re: [Zope] Need some help to get rid of an InvalidObjectReference exception
+---[ chaouche yacine ]-- | | As you see, I do not intentionally copy objects from one | ZODB to another... Except maybe if the session has a | separate storage and that this breaks everything. But then, | I could not even use the _getCopy method because nonZODBish | do not have a _p_jar attribute. SESSION does use its own store. -- Andrew Milton [EMAIL PROTECTED] ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Need some help to get rid of an InvalidObjectReference exception
--- On Wed, 8/20/08, chaouche yacine [EMAIL PROTECTED] wrote: So the question is now : is there another way to put some ZODB objects in the session for future use ? because there is no reason to create the same object twice or thrice in my product so I want it to stay in the session. Thanks. Maybe I should try this : http://www.zope.org/Documentation/Books/ZopeBook/2_6Edition/Sessions.stx#3-126 ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Need some help to get rid of an InvalidObjectReference exception
--- On Wed, 8/20/08, chaouche yacine [EMAIL PROTECTED] wrote: From: chaouche yacine [EMAIL PROTECTED] Subject: Re: [Zope] Need some help to get rid of an InvalidObjectReference exception To: Dieter Maurer [EMAIL PROTECTED] Cc: zope@zope.org Date: Wednesday, August 20, 2008, 5:12 AM --- On Wed, 8/20/08, chaouche yacine [EMAIL PROTECTED] wrote: So the question is now : is there another way to put some ZODB objects in the session for future use ? because there is no reason to create the same object twice or thrice in my product so I want it to stay in the session. Thanks. Maybe I should try this : http://www.zope.org/Documentation/Books/ZopeBook/2_6Edition/Sessions.stx#3-126 ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev ) Ok here's how I did to finally fix it : * create a new Transient Object Container (sessionTOC) at root * create a new Session Data Manager (sessionDM), with the following settings : ** Id : sessionDM ** Transient Object Container Path : /sessionTOC ** Place SESSION in REQUEST object as : ZODBSESSION Now I can put ZODB objects in ZODBSESSION using something like : context.REQUEST.ZODBSESSION.set(object,o) Thanks to all of you for your precious help. ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Need some help to get rid of an InvalidObjectReference exception
+---[ chaouche yacine ]-- | | Ok here's how I did to finally fix it : | | * create a new Transient Object Container (sessionTOC) at root | * create a new Session Data Manager (sessionDM), with the following settings : | ** Id : sessionDM | ** Transient Object Container Path : /sessionTOC | ** Place SESSION in REQUEST object as : ZODBSESSION | | Now I can put ZODB objects in ZODBSESSION using something like : | | context.REQUEST.ZODBSESSION.set(object,o) | | Thanks to all of you for your precious help. Your main ZODB will grow everytime you add or remove something in ZODBSESSION, you're essentially storing the same object twice in your ZODB. -- Andrew Milton [EMAIL PROTECTED] ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Need some help to get rid of an InvalidObjectReference exception
--- On Wed, 8/20/08, Andrew Milton [EMAIL PROTECTED] wrote: From: Andrew Milton [EMAIL PROTECTED] Subject: Re: [Zope] Need some help to get rid of an InvalidObjectReference exception To: chaouche yacine [EMAIL PROTECTED] Cc: zope@zope.org Date: Wednesday, August 20, 2008, 5:27 AM +---[ chaouche yacine ]-- | | Ok here's how I did to finally fix it : | | * create a new Transient Object Container (sessionTOC) at root | * create a new Session Data Manager (sessionDM), with the following settings : | ** Id : sessionDM | ** Transient Object Container Path : /sessionTOC | ** Place SESSION in REQUEST object as : ZODBSESSION | | Now I can put ZODB objects in ZODBSESSION using something like : | | context.REQUEST.ZODBSESSION.set(object,o) | | Thanks to all of you for your precious help. Your main ZODB will grow everytime you add or remove something in ZODBSESSION, you're essentially storing the same object twice in your ZODB. -- Andrew Milton [EMAIL PROTECTED] Correct. I Quit... :( better not to store ZODB objects in the session and try to get some way around. ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Need some help to get rid of an InvalidObjectReference exception
+---[ chaouche yacine ]-- | | Correct. I Quit... :( better not to store ZODB objects in the session and try to get some way around. So now you can go look at the Cache objects that Zope provides :-) -- Andrew Milton [EMAIL PROTECTED] ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Need some help to get rid of an InvalidObjectReference exception
+---[ chaouche yacine ]-- | | Correct. I Quit... :( better not to store ZODB objects in the session and try to get some way around. So now you can go look at the Cache objects that Zope provides :-) -- Andrew Milton [EMAIL PROTECTED] If you are talking about RAM cache, HTTP cache etc., I don't know if they'll do the trick because, again, it's about caching objects that do not live in the ZODB, i.e I cannot go in the ZMI and click the cache tab on a python script or a page template because that's not what I am trying to do. But maybe there's the volatile attributes alternative, and that fails too then I have no choice but to do the caching mechanism myself... ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Need some help to get rid of an InvalidObjectReference exception
+---[ chaouche yacine ]-- | +---[ chaouche yacine ]-- | | | | Correct. I Quit... :( better not to store ZODB objects in | the session and try to get some way around. | | So now you can go look at the Cache objects that Zope | provides :-) | | -- | Andrew Milton | [EMAIL PROTECTED] | | If you are talking about RAM cache, HTTP cache etc., I don't know if they'll do the trick because, again, it's about caching objects that do not live in the ZODB, i.e I cannot go in the ZMI and click the cache tab on a python script or a page template because that's not what I am trying to do. | | But maybe there's the volatile attributes alternative, and that fails too then I have no choice but to do the caching mechanism myself... Whatever you are doing, you are doing the wrong thing. You are instantiating persistent objects and not storing them in the ZODB. This is going to cause your ZODB to grow, so you might as well store them. Otherwise you need to make non-persistent versions of the objects you are trying to 'cache' and use those instead. -- Andrew Milton [EMAIL PROTECTED] ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Need some help to get rid of an InvalidObjectReference exception
Whatever you are doing, you are doing the wrong
thing.
You are instantiating persistent objects and not storing
them in the
ZODB. This is going to cause your ZODB to grow, so you
might as well
store them.
Otherwise you need to make non-persistent versions of the
objects you
are trying to 'cache' and use those instead.
--
Andrew Milton
[EMAIL PROTECTED]
Not exactly. I am instantiating non persistent objects that do have a reference
to persistence objects in the form of an attribute, and then trying to cache
those non persistent objects.
Do the fact that these non persistent objects store a reference to persistent
ones turn them into persistent ? I am curious to know.
Anyway, I tried the volatile attribute thing
(http://wiki.zope.org/ZODB/VolatileAttributes) and first tests look fine.
This is how I did the trick :
===
ZODBLivinObject.py
===
from OFS.SimpleItem import SimpleItem
from NonZODBObject import NonZODBObject
class ZODBLivingObject(SimpleItem) :
Hello, I live in the ZODB.
meta_type = ZODBish
def __init__(self):
self.id = ZODBish
self.title = ZODBish
def sayHi(self):
# NonZODBObject stores a reference of self, a ZODB-living object.
nonZODBish = NonZODBObject(self)
# This line breaks everything. Comment it and every thing will be just
right.
# self.REQUEST.SESSION.set('breakish',nonZODBish)
self.setNonZODBish(nonZODBish)
# This can be seen in the console if runzope
print it's me,nonZODBish.context
return nonZODBish.context
def setNonZODBish(self,p_nonZODBish):
setattr(self,'_v_NonZODBish',p_nonZODBish)
def getNonZODBish(self):
if not hasattr(self,_v_NonZODBish):
self.setNonZODBish(None)
return self._v_NonZODBish
And then I use the setNonZODBish et getNonZODBish methods to set and access the
cached value.
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Re: [Zope] Need some help to get rid of an InvalidObjectReference exception
+---[ chaouche yacine ]-- | | | Not exactly. I am instantiating non persistent objects that do have a reference to persistence objects in the form of an attribute, and then trying to cache those non persistent objects. | | Do the fact that these non persistent objects store a reference to persistent ones turn them into persistent ? I am curious to know. | | Anyway, I tried the volatile attribute thing (http://wiki.zope.org/ZODB/VolatileAttributes) and first tests look fine. You understand that _v_ attributes are only available in the thread they were created, and will disappear when the object leaves the object cache. If you manage to get a 2nd thread there will be nothing in the _v_ attribute, or wait 10 or so mins between requests... -- Andrew Milton [EMAIL PROTECTED] ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Need some help to get rid of an InvalidObjectReference exception
You understand that _v_ attributes are only available in the thread they were created, and will disappear when the object leaves the object cache. If you manage to get a 2nd thread there will be nothing in the _v_ attribute, or wait 10 or so mins between requests... -- Andrew Milton [EMAIL PROTECTED] Yes this could be dangerous, but in my case these volatile attributes need not to be in the cache for a very long time, it's just a matter of 3 or 4 clicks in about half a dozen of minutes. But yeah, I'll really have to be careful about that, or to recreate them if they're gone (hence the setattr and getattr to make sure there's something in self._v_something and create one if there's not) ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Need some help to get rid of an InvalidObjectReference exception
chaouche yacine wrote at 2008-8-18 09:50 -0700: Need some help to get rid of an InvalidObjectReference exception In my zope product, when I try to put some specific object in the session, I get this : 2008-08-18T14:51:02 ERROR(200) SiteError http://www.afdas.com:8091/noyauafdas/tests/testAdresses Traceback (most recent call last): File /opt/Zope-2.7/lib/python/ZPublisher/Publish.py, line 107, in publish transactions_manager.commit() File /opt/Zope-2.7/lib/python/Zope/App/startup.py, line 222, in commit get_transaction().commit() File /opt/Zope-2.7/lib/python/ZODB/Transaction.py, line 241, in commit ncommitted += self._commit_objects(objects) File /opt/Zope-2.7/lib/python/ZODB/Transaction.py, line 356, in _commit_objects jar.commit(o, self) File /opt/Zope-2.7/lib/python/ZODB/Connection.py, line 452, in commit dump(state) InvalidObjectReference: Attempt to store an object from a foreign database connection A given persistent object can only be in one (ZODB-) database, not in several databases at the same time. You must copy the persistent object, when you want it to be stored (also) in another (ZODB-) database. You can use the _getCopy(destination) method to create such a copy. _getCopy is defined by OFS.CopySupport.CopySource inherited by most Zope objects. -- Dieter ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
[Zope] Need some help to get rid of an InvalidObjectReference exception
Need some help to get rid of an InvalidObjectReference exception
Hi zopers,
In my zope product, when I try to put some specific object in the session, I
get this :
2008-08-18T14:51:02 ERROR(200) SiteError
http://www.afdas.com:8091/noyauafdas/tests/testAdresses
Traceback (most recent call last):
File /opt/Zope-2.7/lib/python/ZPublisher/Publish.py, line 107, in publish
transactions_manager.commit()
File /opt/Zope-2.7/lib/python/Zope/App/startup.py, line 222, in commit
get_transaction().commit()
File /opt/Zope-2.7/lib/python/ZODB/Transaction.py, line 241, in commit
ncommitted += self._commit_objects(objects)
File /opt/Zope-2.7/lib/python/ZODB/Transaction.py, line 356, in
_commit_objects
jar.commit(o, self)
File /opt/Zope-2.7/lib/python/ZODB/Connection.py, line 452, in commit
dump(state)
InvalidObjectReference: Attempt to store an object from a foreign database
connection
after hours of googling and debugging (not very easy because traceback does not
show the line of your product code that fired the exception), I found the line
that is breaking everything.
def remonterAdresses(self,p_idEntreprise=0):
Sans arguments, cette methode retourne les adresses stockees en session.
# XXX : attention, p_idEntreprise est totalement ignore si entreprise
deja en session
entreprise = self.REQUEST.SESSION.get('entreprise')
print GestionnaireEntreprises::remonterAdresses...
if not entreprise :
entreprise = Entreprise(self,p_idEntreprise)
print mise de entreprise en session..
self.REQUEST.SESSION.set('entreprise',entreprise)
print ...mise en session OK
adresses = entreprise.remonterAdresses()
print GestionnaireEntreprises::remonterAdresses OK, adresses =
,adresses
return adresses
Now, the bug comes form the line
self.REQUEST.SESSION.set('entreprise',entreprise)
entreprise is an instance of Entreprise. I never put objects of this class in
the ZODB because I don't need them to persist, they're just temporary. However,
because Entreprises objects need to access to other objects that are in the
ZODB, I pass them self as first argument, so that they can use it as a
context to acquire other objects (for examples, Z SQL Methods). So inside
Entreprise code, I can do something like self.context.zsql_method_something...
because self.context is a reference to the caller, which lives in the ZODB. The
caller is gestionnaireEntrprises.
So my question is : what is wrong with that ? Why do I get this
InvalidObjectReference ? is it the entreprise object that is in the session ?
is it the gestionnaireEntreprises that is stored as an attribute of the
entreprise object ? maybe both ?
Thank you for any advice.
Zope 2.7
python 2.3
plone 2.0.5
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