- Zope-Dev - Zope lists

how to call a ZClass from a method
by Nils Wiegandt 10 Aug '01

10 Aug '01

don not want to use the pulldownmenue to start a Zclass ,but want to write a method which call a ZClass automatically by a submitbottom. how can I do that? thanks so far...

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Threads, ZODB, deactivate, setstate, etc...
by Olivier Deckmyn 10 Aug '01

10 Aug '01

Hi there ! I am working on my product ZExternalNews (http://www.zope.org/Members/odeckmyn/ZExternalNews) I have a problem that I did not have anticipated ! My product is made of 3 classes: 1/ ZExternalNewsManager (usually one per site), folderish that contains several ZExternalNewsChannel 2/ ZExternalNewsChannel (several per Manager), itemish. Contains 2 persistent properties (title and url) and a _v_items, a list of ZExternalNewsItem 3/ ZExternalNewsItem a very simple Python class (no inheritance from zope nor ZODB). It handles an atomic news item (like a single news item in slashdot for example). When ZExternalNewsManager starts, I also "fork" a thread that (simplified) does : while 1: MyManager.Refresh() sleep(MyManager.delay) Where MyManager.Refresh is a loop that calls refresh on every channel. This would work in a wonderful land...but not in real life. I've been searching for hours now... My problem is : It works for some time (sometime 10sec, sometimes 2 hours, sometime 10 min...), and then, I got a lot of : 2001-08-07T17:36:04 ERROR(200) ZODB Couldn't load state for '\000\000\000\000\000\000WG' Traceback (innermost last): File /isp/zope/newfun/lib/python/ZODB/Connection.py, line 508, in setstate AttributeError: 'None' object has no attribute 'load' (a lot of = one per ZExternalChannel instance) and a last : Exception in thread Thread-4: Traceback (innermost last): File "/usr/local/lib/python1.5/threading.py", line 376, in __bootstrap self.run() File "/isp/zope/newfun/lib/python/Products/ZExternalNews/ZExternalNews.py", line 454, in run self._manager.Refresh() File "/isp/zope/newfun/lib/python/ZODB/Connection.py", line 508, in setstate p, serial = self._storage.load(oid, self._version) AttributeError: 'None' object has no attribute 'load' After hours of thinking, I think this is because ZODB ask my objects to go to sleep (is this DEACTIVATING ?). The last modification I made was to implement __setstate__ so that _v_* attributes are declared there : I thought it would be ok after that. It is not :( Please help me ! It is quite a frustrating experience ! Do not hesitate to Is there a document I should read before understanding ? I think I've read quite a lot of things until now ! ;) Attached is the latest version of the .py. Other part of the product is downloadable here : http://www.zope.org/Members/odeckmyn/ZExternalNews Thanx for your support. Olivier.

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Zope 2.3.3: PropertySheets mess
by Dieter Maurer 10 Aug '01

10 Aug '01

Why can PropertySheets not be copied/pasted? They can be exported but only imported when they are empty. Why? Seems, someone stopped in the middle of the PropertySheets support implementation.... Dieter

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_v_cache error with ZedPatterns
by Chris Withers 10 Aug '01

10 Aug '01

Hi, I keep getting the following errors from ZPatterns: Error Type: AttributeError Error Value: _v_cache Traceback (innermost last): (Object: LockableItem) File /usr/local/zope/2.4.0_base/lib/python/ZPublisher/Publish.py, line 162, in publish File /usr/local/zope/2.4.0_base/lib/python/ZPublisher/BaseRequest.py, line 447, in traverse File Products/LoginManager/LoginManager.py, line 252, in validate (Object: ProviderContainer) File Products/LoginManager/LoginMethods.py, line 105, in findLogin (Object: PlugInBase) File Products/LoginManager/LoginManager.py, line 209, in getItem (Object: ProviderContainer) File Products/ZPatterns/Rack.py, line 56, in getItem (Object: ProviderContainer) File Products/ZPatterns/Rack.py, line 259, in _fromCache (Object: ProviderContainer) AttributeError: (see above) This is: Zope 2.4.0 ZedPatterns-0-4-3p2-transactionagents LoginManager-0-8-8b1 (Steve A's special hacked version) Any ideas? I don't really understand, 'cos _v_cache is a computed _class_ attribute: _v_cache = ComputedAttribute(_v_cache) I wonder if this line could have an effect: __per_transaction_cache_attrs__ = ('_v_cache',) Any help would be very much appreciated... cheers, Chris

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Packaging information from China
by Maria Chen 10 Aug '01

10 Aug '01

Dear Sir or Madam: Greetings from HuaYang International Commercial Tours. We are affiliated to China Council for the Promotion of International Trade (CCPIT) and China Chamber of International Commerce (CCIC). We provide varieties of services to overseas businessmen who ar As China is going to enter the WTO, Chinese market is bound to expand. With the import and export business' extending, packaging trade will certainly ascend to a new height. And we are always prepared to offer you firsthand information and assistance on t >From October to December 2001, there will be several trade fairs on building and construction in China: THE 7TH INTERNATIONAL FOOD PROCESSING PACKAGING MACHINERY EXHIBITION (CHINA FOODTECH) Date: 1-5Nov2001 City: Beijing THE 4TH CHENGDU INTERNATIONAL PLASTICS AND PACKAGING EXHIBITION Date: 8-11Nov2001 City: Chengdu If you are interested in these issues, please feel free to contact us. To know more about our services, please visit our website: www.businesstravel.com.cn Best Regards! Sincerely yours, Maria Chen Hua Yang International Commercial Tours Corp., Ltd. Web: www.businesstravel.com.cn Email: maria(a)businesstravel.com.cn

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Z SQL Method problems (now two confirmed bugs)
by Andy Dustman 10 Aug '01

10 Aug '01

[Moving this to Zope-Dev] I've done some more investigation and determined there is a fundamental flaw in the way Z SQL Method parameters are handled. On Tue, 7 Aug 2001, Andy Dustman wrote: > I have a Z SQL Method (SELECT) with the following parameters: > > HostId DomainId Name IP > > and the following SQL: > > SELECT > HostId, DomainId, RecordType, Name, IP, Distance, Target, TTL, > StartEndTime, Location, Updated > FROM Hosts > <dtml-sqlgroup where> > <dtml-sqltest HostId column="HostId" type=int optional> > <dtml-and> > <dtml-sqltest DomainId column="DomainId" type=int optional> > <dtml-and> > <dtml-sqltest Name column="Name" type=nb optional> > <dtml-and> > <dtml-sqltest IP column="IP" type=int optional> > </dtml-sqlgroup> > > Note that all tested columns are optional. Using the Test tab, everything > works correctly: If I leave off values, that portion isn't rendered. > > Now... I have a DTML Method which performs: > > <dtml-in SELECT mapping> ... </dtml-in> > > This bombs unless all the parameters are specified in form data. Now, for the reason it bombs: When called, a Z SQL Method ultimately gets information about parameters from the parse() function in Aquaduct.py. For each parameter parsed (and there are problems with the parsing, but that's another problem), it checks trys three things: 1) Get the parameter value from REQUEST. 2) Failing that: Assign the parameter it's default value, if it exists. 5^H3) Failing that: If the parameter is marked optional, ignore it. Here is the problem: There is no way for parse() to mark a parameter as optional. It simply is not tested for in any way. It also cannot get this information from the <dtml-sqltest ...> element, because it doesn't have access to it or the template. Solution: parse() does have the capability of finding a parameter type (for the above-mentioned reason), i.e. the parameters could be written: HostId:int DomainId:int Name:nb IP:int I propose also allowing :optional to follow the type, so that parse() can set this properly, i.e.: HostId:int:optional DomainId:int:optional Name:nb:optional IP:int:optional Note that currently default values take precedence over optional values (if it could find any). I'll prepare a patch that can do this if requested (DC/ZopeCorp decide this is a good solution) and it will also fix the parameter="value" parsing problem (broken in 2.4.0). -- Andy Dustman PGP: 0xC72F3F1D @ .net http://dustman.net/andy I'll give spammers one bite of the apple, but they'll have to guess which bite has the razor blade in it.

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Zope-2.4.0 and python 2.1.1 error
by Dario Lopez-Kästen 10 Aug '01

10 Aug '01

Hello, I have the following problem with Zope-2.4.0 Source release compiled on Solaris (SunOS 5.6 Generic_105181-21 sun4u sparc SUNW,Ultra-4) It seems that it if user A exports a folder owned by user B, then user B cannot import it back and take ownership of it. However it is Ok if user A imports user Bs folder; after import user B can take back ownerships og his folder from user A. Is this a bug? Here's what we did: 1) User A exports a Zope 2.3.3 folder owned by user B 2) User A imports to folder to Zope 2.4.0 3) User A deletes folder, since in Zope 2.4.0 user should own the folder 4) Log out user A, login user B 6) User B imports folder, taking ownership, and fails with message below 7) User A logs in on other machine to server imports folder, OK 8) User B creates new folder and in it imports the folder. Fails again. 9) User B takes ownership of folder imported by user A. Sucess Error message: Traceback (most recent call last): File "/usr/local/zope/ZopeInstall/Zope-2.4.0/z2.py", line 774, in ? asyncore.loop() File "/usr/local/python-2.1.1/lib/python2.1/asyncore.py", line 194, in loop poll_fun (timeout, map) File "/usr/local/python-2.1.1/lib/python2.1/asyncore.py", line 86, in poll r,w,e = select.select (r,w,e, timeout) select.error: (4, 'Interrupted system call') Sincerely, /dario - -------------------------------------------------------------------- Dario Lopez-Kästen Systems Developer Chalmers Univ. of Technology dario(a)ita.chalmers.se ICQ will yield no hits IT Systems & Services

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DCO2 beta5 and Solaris
by Dario Lopez-Kästen 10 Aug '01

10 Aug '01

Hello! Has anybody gotten any success using DCO2Beta5 with Solaris and Zope 2.3.3 and the LAtest Hotfix installed? I have it working w/o problems on my Win2K machine and Zope-2.4.0 but not on our Solaris server with 2.3.2 nor 2.3.3 /dario - -------------------------------------------------------------------- Dario Lopez-Kästen Systems Developer Chalmers Univ. of Technology dario(a)ita.chalmers.se ICQ will yield no hits IT Systems & Services

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ftp problems
by Terry Kerr 10 Aug '01

10 Aug '01

Hi, I have seen many related posts on ftp problems before, but none seem to be specific to my problem. It has really got be stumped! I am FTPing from my box on a local network, though a gateway/firewall/masquerading box to the internet, through to a server running zope with ftp on port 21. The server is running a ipfilter firewall, letting all connections out, but only port 80,21,20,443 in. The gateway box is linux running an ipchains firewall which lets every connectin out, and it has the ftp masquerading kernel module loaded. The problem I have is that my ftp client (linux client, running in passive mode), will connect and authenticate to the zope ftp server, but I can't do anything else. If I turn the firewall off on our remote server, then ftp works fine. However, if I turn the firewall back on, but ftp from our gateway rather than my box behind the gateway, then ftp also works fine. Also, if I turn off the zope server, and run a standard ftpd daemon on port 21 on our remote server, I can ftp to it fine with the firewall turned on. So the problem is specific to zope+firewall+masquerading. Remove either one of those and it works. It makes be think that the ftp server in zope doesn't work in passive mode as it should? Any ideas? -- Terry Kerr (terry(a)adroit.net) Adroit Internet Solutions (www.adroit.net) Phone: +61 3 9563 4461 Fax: +61 3 9563 3856 ICQ: 79303381

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Searchable zope-dev archives?
by David Thibault 09 Aug '01

09 Aug '01

Hello all, Is there a search interface somewhere to the zope-dev archives? If not, it would strike me as strange, given Zope's intrinsic cataloguing features...=) Thanks, Dave

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