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help: updating zclass-based products
by news-list.zope.dev＠innominate.de 10 Apr '00

10 Apr '00

Hi, we have a development server and a production server. I'm currently developing a zclass-only product. To install it on the production server, I make a zexp off my dev-machine and import it on the prodcution server. This works _once_, because if I try to import a new version of the same product zexp, I naturally get an error, as the product is already installed. I can delete the old version and re-import the new version of course but with my zclasses being some kind of static superclasses of their instances, what happens to these? Answer: as long as the zope process is running between deleting the old version and importing the new one, everything's fine. But if zope dies for some reason, all my instances are gone !? So: how do YOU update zclass-based products between a development and a production server? Can it be that there's no intelligent mechanism for that? Am I just too stupid? Thanks, Heiko -- heiko.stoermer(a)innominate.de innominate AG networkingpeople fon: +49.30.308806-0 fax: -77 web: http://innominate.de

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volatile state maintenance
by Sam Gendler 10 Apr '00

10 Apr '00

I have a product which needs to maintain a connection to a 300MB database file (Metakt, if you must know). The initial connection takees about 3 seconds, due to the size of the file, so I wanted to make a product that will keep the connection open, and re-use it. I made a python base class which opens the connection, but I get the following error from zope when it tries to pickle the object into the ZODB. Traceback (innermost last): File /home/ultraseek/Zope-2.1.6-src/lib/python/ZPublisher/Publish.py, line 214, in publish_module File /home/ultraseek/Zope-2.1.6-src/lib/python/ZPublisher/Publish.py, line 179, in publish File /home/ultraseek/Zope-2.1.6-src/lib/python/Zope/__init__.py, line 202, in zpublisher_exception_hook (Object: RoleManager) File /home/ultraseek/Zope-2.1.6-src/lib/python/ZPublisher/Publish.py, line 169, in publish File /home/ultraseek/Zope-2.1.6-src/lib/python/ZODB/Transaction.py, line 237, in commit File /home/ultraseek/Zope-2.1.6-src/lib/python/ZODB/Connection.py, line 325, in commit (Info: (('*yr88KIATmOLZfiZXPxWNeA==', 'ODP'), '\000\000\000\000\000\000\000\262', '')) UnpickleableError: (see above) I don't actually need the database connection itself to be in the ZODB, as it will not be open the next time zope restarts, anyway, but I would like it to remain resident in memory so that I can use it without reconnecting on every request. Additonally, it would be gat to be able to detect when the connection has gone down, and re-create it. Any tips? I am sure it can be done, but I have no idea where to even start, as far as adding something to the global namespace --sam

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Logout
by Sin Hang Kin 10 Apr '00

10 Apr '00

I just apply an test account from imeme.net. I suddently realize that There is no logout operation available. Rgs, Kent Sin

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Re: Zope-Dev Logout
by Sin Hang Kin 09 Apr '00

09 Apr '00

With a login operation beening done, and the server seems to accept this. The user from his pass experience, would expect an logout operation when he finish his work. >From an interface design or psyc. point of view, the logout operation is necessary. Even it is 100% safe, without a logout operation, the user never feel safe. Even, it does not do anything, put in an logout link to save the user from a possible nightmare. Rgs, Kent Sin

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programmer-only ZopeFish release...
by David Brown 09 Apr '00

09 Apr '00

I've been working on creating an environment for Zope that mirrors some fo the functionality of Manila (http://manila.userland.com) What I've been concentrating on is the ability to edit and post through Pike (http://pikebeta.userland.com) a cool outlining tool. The functionality is minimal right now. VERY minimal. But I wanted to get it out in the world and see if I could get some momentum going. I'm tracking its development at http://zopefish.weblogs.com and you can download it at http://zopefish.weblogs.com/ZopeFishRelease Come on in and join the fun. dave

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dtml-call problem
by Dr. Peer Griebel 08 Apr '00

08 Apr '00

Hi, I think there is a problem in Zope: I have 3 methods: method_a: <dtml-call "method_b"> method_b: <dtml-call "method_c"> method_c: <dtml-return "_.int(1)"> I can call method_a without problems. But if I change it from <dtml-call "method_b"> to <dtml-call "method_b()"> (look at the braces!) I get an error message. I think this is an error in Zope. Can anybody verify this?! I tried to use such a construct in a larger system here. Error Type: NameError Error Value: method_c Traceback (innermost last): File D:\Programme\uZope\lib\python\ZPublisher\Publish.py, line 214, in publish_module File D:\Programme\uZope\lib\python\ZPublisher\Publish.py, line 179, in publish File D:\Programme\uZope\lib\python\Zope\__init__.py, line 202, in zpublisher_exception_hook (Object: ElementWithAttributes) File D:\Programme\uZope\lib\python\ZPublisher\Publish.py, line 165, in publish File D:\Programme\uZope\lib\python\ZPublisher\mapply.py, line 160, in mapply (Object: method_a) File D:\Programme\uZope\lib\python\ZPublisher\Publish.py, line 102, in call_object (Object: method_a) File D:\Programme\uZope\lib\python\OFS\DTMLMethod.py, line 145, in __call__ (Object: method_a) File D:\Programme\uZope\lib\python\DocumentTemplate\DT_String.py, line 502, in __call__ (Object: method_a) File D:\Programme\uZope\lib\python\DocumentTemplate\DT_Util.py, line 335, in eval (Object: method_b()) (Info: method_b) File <string>, line 0, in ? File D:\Programme\uZope\lib\python\OFS\DTMLMethod.py, line 141, in __call__ (Object: method_b) File D:\Programme\uZope\lib\python\DocumentTemplate\DT_String.py, line 502, in __call__ (Object: method_b) File D:\Programme\uZope\lib\python\DocumentTemplate\DT_Util.py, line 335, in eval (Object: method_c) (Info: method_c) File <string>, line 0, in ? NameError: (see above) -- connection reset by Peer _______________________________________________________________________ Dr. Peer Griebel Tel. +49 7581 4831 23 Geschäftsführer Fax. +49 7581 4831 11 Knoll Informationssysteme GmbH http://www.knoll-is.de Dreiköniggasse 17 mailto:peer@knoll-is.de 88348 Saulgau privat: mailto:peer.griebel@gmx.de

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Where to put stuff (ZCron)
by Morten W. Petersen 08 Apr '00

08 Apr '00

I'm planning on adding a feature to Zope, called ZCron or somesuch, that'll run jobs on a regular basis, as with UNIX cron. Just so I don't reinvent the wheel, are there any similar that have been or are being done? Where is the right place to put it (in the source)? Regards, Morten W. Petersen

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DCOracle and BLOBs Handling
by Cheuk Cheng 07 Apr '00

07 Apr '00

Hi Everyone: In the past couple weeks, I started looking at Zope for my future development work. One of the requirements is to be able to upload and download Oracle blob via Zope. In the last few days, I spent most of my time searching through the mailing list for help from installing DCOracle to inserting blob from an external method. So far I've successfully used DCOracle to create an Oracle connection in an external method and performed some simple db tasks. Now here're my questions for all the zope gurus: 1. Can I use ZSQL method to insert blob into Oracle? It works for querying blob out of the database. Why doesn't it work in insertion? 2. In an external method can I get a hold of the connection object from zope by doing these: import Shared.DCOracle def sql_exec(self, param) ..... conn = self.oracle_connection cur = conn.cursor() cur.execute(sqlstat) ..... When I execute the function from Zope, it keeps giving me an AttributeError for the cursor. Can someone please explain? And if I create the db connection inside using conn = Shared.DCOracle.Connect('scott/tiger@oracledb'), I'll be getting the cursor successfully. 3. With the connection created in the external method, I thought I could make the blob insertion work. Obviously, I'm wrong! I keep getting an error about invalid hex number "oci.error: (1465, 'ORA-01465: invalid hex number\012')". The way I'm testing the insertion is to select a blob from one table and try to insert it in another as follow: cur.execute('select no, blob_data from res_info where no=1000') data = cur.fetchall() a,b = data[0] image = (100, b) cur.execute('insert into test_info (no, data) values(:p1, :p2)', image) I found that the returned "data" is a list of tuple. So I get the first tuple and unpack it. Then I created a new tuple and tried to insert it into the test_info table. And I keep getting the invalid hex number error. When I took this and converted it to a standalone program with a print statement for 'b', it printed out the correct binary data. So I suspect that I may have to convert the binary stream into a string before I can do the insertion? I also tried to set b = 'ff00ff00ff' (a text string of hex numbers), and it didn't complain about it. Can someone please tell me how blob shall be handled? Thanks in advance. - Cheuk

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PLEASE answer: how do I create users in dtml
by news-list.zope.dev＠innominate.de 07 Apr '00

07 Apr '00

Hi, in my ZClass product I have to add a default user. I managed to create an acl_users folder upon instance creation of the product, but I also _need_ a predefined user account in the instance. can this be done from dtml or do I need an external method? (this would be extremely annoying because my whole product is ZClass only. what's the point of being able to create user folders but not users?) I've had a look at the 'manager_users' method but it does not fit my needs. _please_ help, this is the only thing that's missing for a release. I will upload the product to zope.org, I promise. greetings, Heiko Stoermer -- heiko.stoermer(a)innominate.de innominate AG networkingpeople fon: +49.30.308806-0 fax: -77 web: http://innominate.de

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Possible new security API
by Jim Fulton 06 Apr '00

06 Apr '00

I've put together some thoughts and a proposed API for making it easier for application code to operate securely and for implementing new security policies. See: http://www.zope.org/Members/jim/ZopeSecurity/ZopeSecurityPolicies As usual, it's a wiki page. :) Feel free to comment there. Jim -- Jim Fulton mailto:jim@digicool.com Technical Director (888) 344-4332 Python Powered! Digital Creations http://www.digicool.com http://www.python.org Under US Code Title 47, Sec.227(b)(1)(C), Sec.227(a)(2)(B) This email address may not be added to any commercial mail list with out my permission. Violation of my privacy with advertising or SPAM will result in a suit for a MINIMUM of $500 damages/incident, $1500 for repeats.

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