[Zope] Zope2: Handling multiple object creations at once from multiple clients and processes?

[Sebastian Tänzer]

Hello ZOPE users,

I am dealing with the famous (Write) ConflictErrors in a module that is 
fetching remote files from a remote URL with the requests lib, storing them as 
objects with the binary data residing on the file system (no blob is stored in 
the ZODB).

The upload/import routine works by using jQuery’s ajax() and POSTing to the 
upload handler and using SSE to return a progress while the import is running 
and before creating the actual object inside the ZODB.

The first process of course always works fine, but when a second or third 
starts these trigger a ConflictError and are beeing restarted, i.e. all 
selected remote files are downloaded again and then create the objects inside 
the ZODB. All objects are created inside the same tree structure and most of 
the time inside the same Folder.

The conflict’s object oid mentioned in the error message actually is the new 
object beeing created. I first thought this had sth. to do with writing to the 
same object while the addObject routine is running, but it does not seem so. 
What I don’t understand is why the first process writes to something that 
triggers the conflict with the second process.

What’s the recommended way of dealing with such mass creation of objects 
running at the same time that are triggered by AJAX calls on the same context 
without creating conflicts? 

Best
Sebastian
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Re: [Zope] Problem with Zope

[Sebastian Tänzer]

Hello Jordan,

ZOPE does not rely or use neither PHP nor MySQL (in most cases at least - MySQL 
can be integrated using a database adapter).

Without any further details and trace logs it’s almost impossible to say what 
the reason for this is.

Which ZOPE version is running? You can see the details in the ZOPE control 
panel.

Kind regards
Sebastian

> Am 05.01.2016 um 12:45 schrieb Jordan Guerder :
> 
> Hello,
> I discovered Zope, however, I see an error output from one of my clients. 
> Indeed its website appears for a few hours this error message:
> 
> Zope Error
> Zope HAS Encountered an error while publishing this resource.
> Error type: IndexError
> Error Value: 0
> 
> Server side all seems ok:
> - Apache is up
> - Php fpm is up
> - Mysql is up
> 
> The logs do not show me any errors, would you therefore an idea of how I 
> could identify this problem?
> 
> Jordan
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Re: [Zope] __bobo_traverse__ or similiar with python tales expression?

[Sebastian Tänzer]

As I’m still experimenting with this maybe someone here could answer that one:

I have PythonScripts or PageTemplates inside a folderish container in the tree:

root
- folder1
— object1
— folder2
—— script1
—— script2
—— template1

I’d like object1 to acquire script1, script2 and template1 from folder2 as if 
they were attributes/methods of object1, though they’re not.

I’ve played around with modifying __of__ and tried some stuff with __getattr__ 
and __getattribute__, but no success so far.

A simple 

def __of__(self, parent):
  """ ... """
  return self.__of__(self.folder2)

in the class of object1 is not working as it always returns "The object at 
root.folder2 has an empty or missing docstring. Objects must have a docstring 
to be published.“

the object1 class definitely has a docstring.

Any hints how to achieve what I’m trying? Wrong approach?

Best, Sebastian

> Anfang der weitergeleiteten Nachricht:
> 
> Von: Sebastian Tänzer 
> Betreff: __bobo_traverse__ or similiar with python tales expression?
> Datum: 11. Juli 2015 19:53:29 MESZ
> An: zope@zope.org
> 
> Hello fellow Zopees,
> 
> the product we’re using (ZMS) allows methods as attributes to custom object 
> models. These methodes (PythonScript) are created inside a metamanager 
> container as „Wiki.mymethod“, where Wiki is the meta type of the custom 
> object.
> 
> The pathhandler method of these custom objects modifies __bobo_traversal__ 
> for normal http requests and maps these non-existing methods in that context 
> to existing methods in the metaobj_manager container using the context 
> meta_id.
> 
> Calling the same method from a PageTemplate or other PythonScript does not 
> reflect that and - not surprisingly - returns an AttributeError:
> 
> File 
> "/opt/python/zope2-pip/lib/python2.7/site-packages/Products/PageTemplates/ZRPythonExpr.py",
>  line 
> 48, in __call__
>return eval(self._code, vars, {})
>  File "PythonExpr", line 1, in 
> AttributeError: dummyFunction
> 
> Is there a way to modify traversal behaviour from the Product or somehow 
> different?
> 
> Best
> Sebastian


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[Zope] __bobo_traverse__ or similiar with python tales expression?

[Sebastian Tänzer]

Hello fellow Zopees,

the product we’re using (ZMS) allows methods as attributes to custom object 
models. These methodes (PythonScript) are created inside a metamanager 
container as „Wiki.mymethod“, where Wiki is the meta type of the custom object.

The pathhandler method of these custom objects modifies __bobo_traversal__ for 
normal http requests and maps these non-existing methods in that context to 
existing methods in the metaobj_manager container using the context meta_id.

Calling the same method from a PageTemplate or other PythonScript does not 
reflect that and - not surprisingly - returns an AttributeError:

File 
"/opt/python/zope2-pip/lib/python2.7/site-packages/Products/PageTemplates/ZRPythonExpr.py",
 line 
48, in __call__
return eval(self._code, vars, {})
  File "PythonExpr", line 1, in 
AttributeError: dummyFunction

Is there a way to modify traversal behaviour from the Product or somehow 
different?

Best
Sebastian
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Re: [Zope] Zope in The Netherlands

[Sebastian Tänzer]

OT: Chris, no offence, but your „Job Market“ doesn’t really give a reputable 
impression. As a business I would not submit any data there. At last, your 
privacy policy really sounds somewhat „strange“ and should get approval by a 
lawyer maybe. Besides that, the information on you is really very vague and not 
really helpful. All in all the whole site looks very unfinished „under 
construction“.

Lots of room for improvement.

Just my 2 cents… 

> Am 09.07.2015 um 20:33 schrieb Christopher Lozinski 
> :
> 
> 
> 
> On 7/8/15 3:10 PM, Kees de Brabander wrote:
>> Hi there,
>> I desperately need a zope server, at least for a transition period. Is there 
>> in The Netherlands a company that still uses zope or has experience with 
>> zope that can help or advise me?
> 
> I can happily come to the Netherlands.  I am an EU Citizen.
> 
> Here is my old Zope 2 website:
> 
> http://zope.specialtyjobmarkets.com/
> 
> And here is its much more modern replacement.
> http://www.privacv.com/markets/zope2
> 
> PrivaCV is built on top of ZODB, ZTK, Grok, and Zopache.
> 
> I invite you to post your job there.  I will email it out to my
> candidates on the old job boards. 
> 
> You can read my blog about all things Zope at:
> 
> zopache.com
> 
> What exactly do you need?
> 
> Regards
> Chris
> 
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Re: [Zope] Zope in The Netherlands

[Sebastian Tänzer]

We offer ZOPE2 hosting on our Proxmox cluster.

Unfortunately in Germany only (never thought I’d say that one day… ;-) )

Kind regards
Sebastian

-
tänzermedien GmbH - Agentur für Online-Medien
Kekuléstr. 39 | 53115 Bonn, Germany
E-Mail: s...@taenzer.me | Web: http://www.taenzer.me  
Tel.: 0228-304134-0 | Fax.: 0228-304134-99

> Am 08.07.2015 um 15:10 schrieb Kees de Brabander :
> 
> Hi there,
> I desperately need a zope server, at least for a transition period. Is there 
> in The Netherlands a company that still uses zope or has experience with zope 
> that can help or advise me?
> tia, Cornelis J. de Brabander
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Re: [Zope] issue with authentication

[Sebastian Tänzer]

Yamana,

did you try to login with the recovery user/password?

To do so you have to create an emerceny user using the zpasswd.py script 
(locatet either at site-packages/Zope2/Startup/misc/zpasswd.py or 
site-packages/Zope2/utilities/zpasswd.py I Zope was installed from egg.

Example in command line/terminal on our systems (virtualenv used):

cd —path to your zope instance --
/opt/python/zope2-pip/lib/python2.7/site-packages/Zope2/utilities/zpasswd.py -u 
 -p  access

This creates an access file in the bin folder. Move this file to the root of 
the instance:

cd bin
mv access ..

Now restart Zope and you should be able to login using the new credentials.
Correct what you broke then ;-)

Best
Sebastian

> Am 27.06.2015 um 10:56 schrieb Yamana santhosh kumar 
> :
> 
> Hello to all zope users...
> 
>  I have been facing a problem with authentication in zope, i.e when i try 
> to access the zope with localhost:8080/manage it is showing that the username 
> and password , it is shown below.
> 
> even though i am giving correct username and password, it is showing that you 
> are not autherised person to access this resource ..(note:i have changed 
> some check boxes in authentications in acl_users folder)
> 
> I hope that any body can help me to this issue
> 
> Thanks in advance.
> 
> 
> 
> 
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[Zope] PAS & scripted auth

[Sebastian Tänzer]

Hello Tres (maintainer of PAS) and Zope community,

I’m trying to get PAS replace CookieCrumpler to do authentication to Zope2 from 
a python script/Product or external method.

Is there a how-to or tutorial somewhere how to get started on this?

What I want is to authenticate a user through a web login form as Cookie 
Crumbler does (but I’d like to to it from my own script that does other 
things,too).

I’ve

- installed PAS
- replaced the default acl_users in my folder
- added a ZODB user folder
- added a CookieAuthHelper

Now, how do I authenticate the user to Zope if I have a username and password 
(i.e. from request.get(‚username‘) etc.)

Best regards
Sebastian
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Re: [Zope] ZCatalog queries performance

[Sebastian Tänzer]

Thanks, this answered all of my questions :-)

Best, Sebastian 

> Am 19.05.2015 um 12:50 schrieb Tres Seaver :
> 
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA1
> 
>> On 05/19/2015 04:54 AM, Sebastian Tänzer wrote:
>> 
>> Let’s say I want to display an accordion with all events of a month 
>> displaying quite a lot of data about the event (30-50 events on one 
>> page, collapsible jQuery accordion). At the moment I get the results
>> and put the objects into the result set via unrestrictedTraverse
>> using getPath(). Would it be better to only get the path and get the
>> object in the template? Does this make any difference performance
>> wise?
> 
> Nope.  Doing it in trusted code (an actual method, and ExternalMethod, or
> a view) would be faster than either a script or a template.  Measure it
> to decide whether to switch, however.
> 
>> Which data of the event objects would I keep as ZCatalog meta columns 
>> and which not? Documentation is not really helpful on this.
> 
> It is super application-dependent.  The costs for maintaining "extra"
> columns of metaata are relatively small (bloating the Record object, and
> therefore its pickle, mostly).
> 
>> The tricky part is that events are linked with different locations 
>> (event location, selling points) that are not children of the event 
>> object but objects in a different folder. The event object itself
>> only keeps the links to these location objects and I get them when
>> iterating over the result set in the template.
> 
> If you can define a URL-addressible method of the event which returns or
> redirects to those objects, you can get away with hard-wiring that in
> your template, using 'brain.getPath()' as a prefix.
> 
>> Any advice what would be the best way for this performance-wise? Is
>> it okay to get the object itself via traversal? Is there a faster way
>> to get the object data?
> 
> Fetching the object is fast if it is already in the ZODB cache, but slow
> if not, nd may cause other, more "popular" / important objects to be
> evicted.  Where possible, design for catalog queries which don't need to
> fetch the object.
> 
> 
> 
> Tres.
> - -- 
> ===
> Tres Seaver  +1 540-429-0999  tsea...@palladion.com
> Palladion Software   "Excellence by Design"http://palladion.com
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Re: [Zope] ZCatalog queries performance

[Sebastian Tänzer]

Thanks for the feedback and help, Tres. 

Let’s say I want to display an accordion with all events of a month displaying 
quite a lot of data about the event (30-50 events on one page, collapsible 
jQuery accordion). At the moment I get the results and put the objects into the 
result set via unrestrictedTraverse using getPath(). Would it be better to only 
get the path and get the object in the template? Does this make any difference 
performance wise?

Which data of the event objects would I keep as ZCatalog meta columns and which 
not? Documentation is not really helpful on this.

The tricky part is that events are linked with different locations (event 
location, selling points) that are not children of the event object but objects 
in a different folder. The event object itself only keeps the links to these 
location objects and I get them when iterating over the result set in the 
template.

Any advice what would be the best way for this performance-wise?
Is it okay to get the object itself via traversal? Is there a faster way to get 
the object data?

> Am 17.05.2015 um 19:37 schrieb Tres Seaver :
> 
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA1
> 
> On 05/17/2015 11:09 AM, Sebastian Tänzer wrote:
>> What are the alternatives?
> 
> The most performant implementation would be to generate the URL for the
> image using a fixed suffix (relative to the result object).  E.g., ::
> 
>  
>
>  
>   
>   TITLE
>  
>
>  
> 
> You could achieve that fixed suffix either by mandating a fixed object
> ID for the image, or by adding a method / view to the event which
> redirected to the actual image URL.
> 
> 
> 
> Tres.
> - -- 
> ===
> Tres Seaver  +1 540-429-0999  tsea...@palladion.com
> Palladion Software   "Excellence by Design"http://palladion.com
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[Zope] ZCatalog queries performance

[Sebastian Tänzer]

Hello,

I’m querying a ZCatalog with a lot of indexes and some meta data for event 
objects to get related events by tags.
These need to be displayed with a title image (which itself is a sub object of 
the event object) and a pre-defined short text.

My python query script gets the results, I then loop over them and get the 
object with unrestrictedTraverse(x.getPath(), None).
I understood getObject is not really performant, but getting the objects with 
unrestrictedTraverse is not a lot faster.

What would be the best way to query for these objects and then display the 
results with the image?
Should I add the url of the image as meta data (title_image etc.)?

What is the best way to display search results? 
Is getting the whole object via unrestrictedTraverse() a good idea?
What are the alternatives?

Best,
Sebastian
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Re: [Zope] ZEO manageUndo not working - DisconnectedError

[Sebastian Tänzer]

After further testing I was able to sort this one out by downgrading ZopeUndo 
to 2.12.0 (pip install ZopeUndo==2.12.0 --force —upgrade).
PyPi only said 4.0 brought Py3 compability. Should I expect any problems using 
ZopeUndo 2.12 + ZEO/ZODB4/ZODB3 with their latest versions?

Best, Sebastian

> Am 06.05.2015 um 07:42 schrieb Niels Dettenbach (Syndicat IT & Internet) 
> :
> 
> Am 6. Mai 2015 01:24:50 MESZ, schrieb "Sebastian Tänzer" :
>> 2015-05-06 01:16:46 WARNING ZEO.zrpc (19205) CW: error connecting to
>> ('::1', ): ECONNREFUSED
>> 2015-05-06 01:16:46 INFO ZEO.ClientStorage zeostorage Testing
>> connection 
>> 2015-05-06 01:16:46 INFO ZEO.zrpc.Connection('C') (127.0.0.1:)
> hmm,
> 
> just a small shot in the dark: Even if this "should" work too - why the 
> client tries to connect the IPv4 address of loopback and the error gives the 
> IPv6 of it back?
> 
> I would try to eleminate this if possible and bring Zope down to IPv4 
> completely, because there are still many software libraries and applications 
> around (even some underlying os parts) which are not well tested with IPv6.
> 
> If this solves your prob - no idea...
> 
> 
> hth a bit.
> cheerioh,
> 
> 
> Niels.
> -- 
> Niels Dettenbach
> Syndicat IT & Internet
> http://www.syndicat.com


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Re: [Zope] ZEO manageUndo not working - DisconnectedError

[Sebastian Tänzer]

After more „research“ I see that the ZMS3 pip packages uses completely 
different versions that don’t seem to be compatible with ZEO (at least Undo is 
not working). I’m aware „undo“ is not a really used feature at all as revisions 
most of the time are beeing implemented by products. My only fear is that we’re 
running into other problems with the ZODB if the base setup is using wrong 
versions and I’d like to avoid that.

Examples:

zope2 via pip uses Aquisition 2.13.8
zope2 via ZMS3 installed via pip uses Aquisition 4.1

zope2 via pip uses ZopeUndo 2.12.0
zope2 via ZMS3 installed via pip uses ZopeUndo 4.0

Most packages with ZMS3 install are newer versions.

So, basic question: What is the recommended way to setup Zope2 with ZEO. Which 
versions work? It seems almost impossible to understand what versions should be 
used. The Zope2 egg uses way older versions. Any problems with that? Which 
packages are safe to update?

Also, there were some patches by the ZMS people last year 
(https://github.com/zopefoundation/Zope/pull/13) - but Zope2 installed via pip 
works just fine here.
Using newer package versions require the patches though.

What is the „best“ setup if I’m using ZEO to connect with Zope2 ZEO clients AND 
from other remote setups (non Zope-Clients, Python command line code working 
with the ZODB via ClientStorage).

Maybe Tres could give me some insight on this?

Best,
Sebastian

> Am 06.05.2015 um 07:42 schrieb Niels Dettenbach (Syndicat IT & Internet) 
> :
> 
> Am 6. Mai 2015 01:24:50 MESZ, schrieb "Sebastian Tänzer" :
>> 2015-05-06 01:16:46 WARNING ZEO.zrpc (19205) CW: error connecting to
>> ('::1', ): ECONNREFUSED
>> 2015-05-06 01:16:46 INFO ZEO.ClientStorage zeostorage Testing
>> connection 
>> 2015-05-06 01:16:46 INFO ZEO.zrpc.Connection('C') (127.0.0.1:)
> hmm,
> 
> just a small shot in the dark: Even if this "should" work too - why the 
> client tries to connect the IPv4 address of loopback and the error gives the 
> IPv6 of it back?
> 
> I would try to eleminate this if possible and bring Zope down to IPv4 
> completely, because there are still many software libraries and applications 
> around (even some underlying os parts) which are not well tested with IPv6.
> 
> If this solves your prob - no idea...
> 
> 
> hth a bit.
> cheerioh,
> 
> 
> Niels.
> -- 
> Niels Dettenbach
> Syndicat IT & Internet
> http://www.syndicat.com


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Re: [Zope] ZEO manageUndo not working - DisconnectedError

[Sebastian Tänzer]

Good morning all,

after further testing we noticed our Zope2 virtualenv setup was done with the 
ZMS3 (CMS) install routine using pip install ZMS3 --process-dependency-links. 
This installed different package versions.

The original pip Zope2 uses these versions: http://pastebin.com/ZEwhVba0
The ZMS3 people use these versions: http://pastebin.com/iu43Ss5w

For example, the ZMS3 setup uses:

• ZopeUndo==4.0
• ZODB==4.1.0
• ZODB3==3.11.0

as the original Zope2 uses:

• ZODB3==3.10.5

No ZEO, no ZODB packages.

Why is Zope2 using the old 3.10 ZODB version and why is there no ZODB4 
installed? ZEO server and clients still work fine without these packages.

The thing is, I notice a lot worse performance with the ZODB, especially with 
traversal, using the native Zope2 setup routine. Catalog search takes almost 
2-3 seconds compared to the ZMS3 versions with a local non-ZEO-Zope instance. 
With the ZMS3 versions ZODB usage is a LOT faster, but there are problems with 
Undo for example in combination with ZEO.

Any ideas on this? I don’t get this version jungle...

Best
Sebastian

> Am 06.05.2015 um 07:42 schrieb Niels Dettenbach (Syndicat IT & Internet) 
> :
> 
> Am 6. Mai 2015 01:24:50 MESZ, schrieb "Sebastian Tänzer" :
>> 2015-05-06 01:16:46 WARNING ZEO.zrpc (19205) CW: error connecting to
>> ('::1', ): ECONNREFUSED
>> 2015-05-06 01:16:46 INFO ZEO.ClientStorage zeostorage Testing
>> connection 
>> 2015-05-06 01:16:46 INFO ZEO.zrpc.Connection('C') (127.0.0.1:)
> hmm,
> 
> just a small shot in the dark: Even if this "should" work too - why the 
> client tries to connect the IPv4 address of loopback and the error gives the 
> IPv6 of it back?
> 
> I would try to eleminate this if possible and bring Zope down to IPv4 
> completely, because there are still many software libraries and applications 
> around (even some underlying os parts) which are not well tested with IPv6.
> 
> If this solves your prob - no idea...
> 
> 
> hth a bit.
> cheerioh,
> 
> 
> Niels.
> -- 
> Niels Dettenbach
> Syndicat IT & Internet
> http://www.syndicat.com


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Re: [Zope] ZEO manageUndo not working - DisconnectedError

[Sebastian Tänzer]

thanks for the „shot“, yet disabling IPv6 locally on the VM does not help, same 
error:

(server):

2015-05-06T10:05:51 INFO ZEO.StorageServer (127.0.0.1:44833) disconnected
--
2015-05-06T10:05:51 INFO ZEO.zrpc.Connection('S') (127.0.0.1:44835) received 
handshake 'Z3101'
--
2015-05-06T10:06:35 ERROR ZEO.zrpc (3040) can't decode message: 
'(K\x05I00\nU\x08undoInfo(K\x00K\x14}U\x0bdescriptioncco...'
--
2015-05-06T10:06:35 ERROR ZEO.zrpc.Connection('S') (127.0.0.1:44835) Error 
caught in asyncore
Traceback (most recent call last):
 File "/opt/python/2.7.9/lib/python2.7/asyncore.py", line 83, in read
   obj.handle_read_event()
 File "/opt/python/2.7.9/lib/python2.7/asyncore.py", line 449, in 
handle_read_event
   self.handle_read()
 File "/opt/python/zope2-latest/lib/python2.7/site-packages/ZEO/zrpc/smac.py", 
line 240, in handle_read
   self.message_input(msg)
 File 
"/opt/python/zope2-latest/lib/python2.7/site-packages/ZEO/zrpc/connection.py", 
line 417, in message_input
   msgid, async, name, args = self.decode(message)
 File 
"/opt/python/zope2-latest/lib/python2.7/site-packages/ZEO/zrpc/marshal.py", 
line 80, in server_decode
   return unpickler.load() # msgid, flags, name, args
 File 
"/opt/python/zope2-latest/lib/python2.7/site-packages/ZEO/zrpc/marshal.py", 
line 120, in server_find_global
   raise ZRPCError("import error %s: %s" % (module, msg))
ZRPCError: import error copy_reg: 
--
2015-05-06T10:06:35 INFO ZEO.StorageServer (127.0.0.1:44835) disconnected
--
2015-05-06T10:06:35 INFO ZEO.zrpc.Connection('S') (127.0.0.1:44837) received 
handshake ‚Z3101'

More ideas? :-)

> Am 06.05.2015 um 07:42 schrieb Niels Dettenbach (Syndicat IT & Internet) 
> :
> 
> Am 6. Mai 2015 01:24:50 MESZ, schrieb "Sebastian Tänzer" :
>> 2015-05-06 01:16:46 WARNING ZEO.zrpc (19205) CW: error connecting to
>> ('::1', ): ECONNREFUSED
>> 2015-05-06 01:16:46 INFO ZEO.ClientStorage zeostorage Testing
>> connection 
>> 2015-05-06 01:16:46 INFO ZEO.zrpc.Connection('C') (127.0.0.1:)
> hmm,
> 
> just a small shot in the dark: Even if this "should" work too - why the 
> client tries to connect the IPv4 address of loopback and the error gives the 
> IPv6 of it back?
> 
> I would try to eleminate this if possible and bring Zope down to IPv4 
> completely, because there are still many software libraries and applications 
> around (even some underlying os parts) which are not well tested with IPv6.
> 
> If this solves your prob - no idea...
> 
> 
> hth a bit.
> cheerioh,
> 
> 
> Niels.
> -- 
> Niels Dettenbach
> Syndicat IT & Internet
> http://www.syndicat.com


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[Zope] ZEO manageUndo not working - DisconnectedError

[Sebastian Tänzer]

Hello once more,

I’m running a fresh Zope2 ZEO setup (pip install 
--index-url=http://download.zope.org/Zope2/index/2.13.22/ Zope2 and pip install 
zope.mkzeoinstance) inside a virtualenv setup.

As said: No products, fresh setup, happens with any object. Going to any undo 
tab produces this error: Error Type: DisconnectedError

Client log:

2015-05-06 01:16:46 INFO ZEO.ClientStorage zeostorage Disconnected from 
storage: "('localhost', )"
2015-05-06 01:16:46 ERROR Zope.SiteErrorLog 1430867806.070.275579780745 
http://192.168.10.38:8080/temp_folder/manage_UndoForm
Traceback (innermost last):
  Module ZPublisher.Publish, line 138, in publish
  Module ZPublisher.mapply, line 77, in mapply
  Module ZPublisher.Publish, line 48, in call_object
  Module Shared.DC.Scripts.Bindings, line 322, in __call__
  Module Shared.DC.Scripts.Bindings, line 359, in _bindAndExec
  Module App.special_dtml, line 185, in _exec
  Module App.Undo, line 112, in undoable_transactions
  Module ZODB.DB, line 901, in undoInfo
  Module ZEO.ClientStorage, line 1283, in undoInfo
  Module ZEO.ServerStub, line 285, in undoInfo
  Module ZEO.zrpc.connection, line 776, in call
  Module ZEO.zrpc.connection, line 796, in wait
DisconnectedError
2015-05-06 01:16:46 WARNING ZEO.zrpc (19205) CW: error connecting to ('::1', 
): ECONNREFUSED
2015-05-06 01:16:46 INFO ZEO.ClientStorage zeostorage Testing connection 

2015-05-06 01:16:46 INFO ZEO.zrpc.Connection('C') (127.0.0.1:) received 
handshake ‚Z3101'

ZEO server log:

2015-05-06T01:15:13 INFO ZEO.zrpc.Connection('S') (127.0.0.1:47063) received 
handshake 'Z3101'
--
2015-05-06T01:16:46 ERROR ZEO.zrpc (19082) can't decode message: 
'(K\x9dI00\nU\x08undoInfo(K\x00K\x14}U\x0bdescriptioncco...'
--
2015-05-06T01:16:46 ERROR ZEO.zrpc.Connection('S') (127.0.0.1:47063) Error 
caught in asyncore
Traceback (most recent call last):
  File "/opt/python/2.7.9/lib/python2.7/asyncore.py", line 83, in read
obj.handle_read_event()
  File "/opt/python/2.7.9/lib/python2.7/asyncore.py", line 449, in 
handle_read_event
self.handle_read()
  File "/opt/python/zope2-latest/lib/python2.7/site-packages/ZEO/zrpc/smac.py", 
line 240, in handle_read
self.message_input(msg)
  File 
"/opt/python/zope2-latest/lib/python2.7/site-packages/ZEO/zrpc/connection.py", 
line 417, in message_input
msgid, async, name, args = self.decode(message)
  File 
"/opt/python/zope2-latest/lib/python2.7/site-packages/ZEO/zrpc/marshal.py", 
line 80, in server_decode
return unpickler.load() # msgid, flags, name, args
  File 
"/opt/python/zope2-latest/lib/python2.7/site-packages/ZEO/zrpc/marshal.py", 
line 120, in server_find_global
raise ZRPCError("import error %s: %s" % (module, msg))
ZRPCError: import error copy_reg:
--
2015-05-06T01:16:46 INFO ZEO.StorageServer (127.0.0.1:47063) disconnected

The path difference in /opt/python/2.7.9/lib/python2.7/asyncore.py vs 
/opt/python/zope2-latest/lib/python2.7/site-packages make me wonder if this is 
a bug or a problem with my setup?

Client + ZEO server were created from the same virtualenv.

Python 2.7.9 build from source.

Any ideas?

Best, Sebastian



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Re: [Zope] manage_renameObjects with remote ZEO

[Sebastian Tänzer]

Tres, thanks for the reply.

In my case, meta_type of both objects is „Folder“ and further checking showed 
both are OFS.Folder classes. My test ist trying to rename a folder inside 
another folder.
obj.all_meta_types() always returns an empty list, which isn’t empty when using 
the same command from inside a normal Zope2 product with the same object.

I was able to bypass the problem by writing my own rename routine using 
_setObject, _getObject but still would like to know why manage_renameObject 
fails.

Best, Sebastian

> Am 06.05.2015 um 00:52 schrieb Tres Seaver :
> 
> 
> 
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA1
> 
> On 05/05/2015 01:42 PM, Sebastian Tänzer wrote:
>> Hello Zope community,
>> 
>> does anyone know how to rename a OFS.Folder object from a remote
>> python script (i.e. command line)? I’m trying this via
>> ZEO.ClientStorage, but it fails with "The object renametest1
>> does not support this operation.“ ,triggered by OFS/CopySupport.py",
>> line 537, in _verifyObjectPaste.
> 
> That error occurs because the object being pasted is of a meta_type which
> cannot be created within the target folder.
> 
> 
> Tres.
> - -- 
> ===
> Tres Seaver  +1 540-429-0999  tsea...@palladion.com
> Palladion Software   "Excellence by Design"http://palladion.com
> -BEGIN PGP SIGNATURE-
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[Zope] manage_renameObjects with remote ZEO

[Sebastian Tänzer]

Hello Zope community,

does anyone know how to rename a OFS.Folder object from a remote python script 
(i.e. command line)? I’m trying this via ZEO.ClientStorage, but it fails with 
"The object renametest1 does not support this operation.“ ,triggered 
by OFS/CopySupport.py", line 537, in _verifyObjectPaste.

Full test case code is at http://pastebin.com/j9HY3PVJ

At first I thought this is because of a missing REQUEST and/or authentication 
problem, as _verifyObjectPaste does some security checks or else fails with 
this message. Still, using makerequest and newSecurityManager doesn’t work.

Any help would be greatly appreciated :-)

Best
Sebastian

-
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E-Mail: s...@taenzer.me | Web: http://www.taenzer.me  
Tel.: 0228-304134-0 | Fax.: 0228-304134-99
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[Zope] Start up failing with ZopeCtlOptions instance has no attribute 'transcript'

[Sebastian Tänzer]

Hello all,

latest Zope2 releases (2.13.23.dev0) seem top have a bug in 
Zope2/Startup/zopectl.py and zdaemon/zdctl.py leading to this error on zopectl 
start (zopectl fg works fine):

Traceback (most recent call last):
  File "/opt/python/zope2/bin/zopectl", line 9, in 
load_entry_point('Zope2==2.13.23.dev0', 'console_scripts', 'zopectl')()
  File 
"/opt/python/zope2/lib/python2.7/site-packages/Zope2/Startup/zopectl.py", line 
488, in run
exitstatus = main()
  File 
"/opt/python/zope2/lib/python2.7/site-packages/Zope2/Startup/zopectl.py", line 
447, in main
c.onecmd(" ".join(options.args))
  File "/opt/python/2.7.9/lib/python2.7/cmd.py", line 221, in onecmd
return func(arg)
  File 
"/opt/python/zope2/lib/python2.7/site-packages/Zope2/Startup/zopectl.py", line 
241, in do_start
ZDCmd.do_start(self, arg)
  File "/opt/python/zope2/lib/python2.7/site-packages/zdaemon/zdctl.py", line 
305, in do_start
args += self._get_override("-t", "transcript")
  File 
"/opt/python/zope2/lib/python2.7/site-packages/Zope2/Startup/zopectl.py", line 
223, in _get_override
value = getattr(self.options, name)
AttributeError: ZopeCtlOptions instance has no attribute 'transcript'

I repeated my setup multiple times and was able to reproduce this every time 
with every setup, so I don't think this is a configuration error on my side 
(yet if it is please tell me what might be wrong). Zope2 was installed using a 
simple pip install Zope2. Imho this bug comes up as in Startup/zopectl.py" the 
ZopeCtlOptions class is beeing emulated but so. missed the transcript attribute 
(as before this happend with the startup-time attribute, too).

I created a patch that's attached to this mail and should be run inside the 
virtualenv python dir (i.e. where bin, include, lib etc. reside):

patch -p0 < patch-zope2-startup.diff

Maybe someone could confirm that this bug exists and this fixes it?

Best
Sebastian

-
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patch-zope2-startup.diff
Description: Binary data
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Re: [Zope] Zope2 - pro/contra

[Sebastian Tänzer]

I just ran into that a few days ago looking for documentation about the 
PUT_factory which has not been copied from the original documenation to the new 
one at http://docs.zope.org/zope2/. But: It still existed and took about 15 
seconds to google it. 

Who's maintaining docs.zope.org/zope2 at the moment? I'd love to add partly 
missing stuff and complete stuff missing at all. Unfortunately these docs don't 
have a CMS behind. I already thought about porting them to a ZMS based site so 
editing and extending would be easier.

> Am 04.03.2015 um 12:35 schrieb Niels Dettenbach :
> 
> 3.) Zope documentation was partly very bad - at least when it comes to 
> installation and system administration, updating etc.pp.

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Re: [Zope] Zope2 - pro/contra

[Sebastian Tänzer]

I do share some of the point of views, especially in regards to bad marketing 
about Zopes future versions and lack of documentation. I don't share the 
criticism on ZPT/TAL - actually I love Page Templates and the approach to 
templating it brought to the web world. Chameleon is one of my favourite 
templating engines around.

Descriping Zope as mature is what I think fits best at the moment. Personally, 
I don't think Zope2 and a limited set of quite good Products is anywhere near 
dying - it's just not widely spread in the media but still I happen to come 
across many projects that work with the ZMS CMS for example where you don't 
expect it. 

My practical experience at least for the last 2-3 years was extremely positive 
about Zope2. We did not have any project where Zope2 was not able to do what 
was needed and do it well, too. Even some external coders were surprised about 
the flexiblity and extensibility.

I'm not saying Zope2 and especially ZMS (which is our primary CMS products 
beeing used) fits every project, but we never ran into any trouble and weren't 
able to do the job. I did do some jobs with Pyramid and the development time 
and performance was (at least with our limited projects) about the same.

Btw, we never really used neither the ZMI nor the TTWE functions really (close 
to never at all). For the last years we're working with our own Cocoa+python 
based MacOS app that uses WebDAV + FTP for local syncing and things like 
compass/sass integration. This is insanely fast despite the protocols (and 
thanks to local development setups and SSDs nowadays) and made us almost forget 
we're working inside the ZODB and not the local file system in the end. Using 
sockets we also sync down remote changes inside ZOPE locally almost instantly. 
It's a little bit like a FTP client on steriods ;-)

Thank you all for your opinions and the open discussion. It's nice to hear 
about other people still using it in production despite its reputation ;-)

Best
Sebastian





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[Zope] Zope2 - pro/contra

[Sebastian Tänzer]

Hello ZOPE community,

we're still developing websites using Zope2 + ZMS3 (www.zms-publishing.com) for 
years now and never ran into any real problems (compared to, let's say, 
Wordpress, typo3, Drupal etc. which had serious security problems over the 
years) and our clients are quite happy with ZMS. 

A few days ago on a barcamp the discussion lead to Zope and the usual comments, 
i.e. "Zope is dead", "I would not use that", "Too complicated", "Too old", 
"Outdated", and so on.

My personal opinion is, that Zope2 is still rock-solid and gets the job done. 
I've never heard of any serious issues compared to the big competitors from the 
PHP or Java world. I looked into Pyramid and Django for different projects and 
always came back to Zope2 itself.

I did not ask that question for quite some time now as there was no reason. 
Sure, sometimes we get comments like "never heard of it" etc., but nothing 
serious. Still, are there any specific reasons (beside personal favors) not to 
use Zope2 anymore? Any reason not to use Zope2 + ZODB for new projects? Are 
other frameworks like flask, Django, pyramid etc. that much better compared to 
Zope?

Best
Sebastian
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