October 2000 - Zope - Zope lists

Q: Advantages of storing ZODB in RDBMS
by Spicklemire, Jerry 13 Oct '00

13 Oct '00

Daniel asked: "Can anyone explain what the advantages are of using an RDBMS for Zope object storage over the standard file system storage?" The folks I know that have asked for that feature have stated their concerns as being: Keeping everything in a single large file is risky, since if that file becomes corrupted, the entire Web Site will be down until recovery is complete. The other side of that one goes something like, "As if we've never seen systems down for RDBMS recovery". Keeping data in a form that's more accessible by external systems is an advantage. And the comeback for that is, "This stuff is not tabular, it's Web Content, and Code". It's not like you can run queries against it, and print reports. Using an RDBMS that has online backup, and quick recovery features is cheap insurance. Cheap is relative. if you happen to have an expensive RDBMS, maybe you can call using it for one more applicaiotn "cheap". Making a copy of data.fs is pretty easy, and recovery is completed by copying over a damaged file. Not exactly rocket science. Also, Tranalyzer makes it pretty painless to recover up to the last good update, which is usually more than you can get from a backup! As you can see, I don't "get" the arguments, but that's what people say, and if they happen to be the people who can veto Zope, you try to find a way to meet their requirements. Later, Jerry S.

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Variable name use in with statement
by Spicklemire, Jerry 13 Oct '00

13 Oct '00

Scott Butchill wonders if: "there is a simpler way to do this." Not much simpler, but how about: <dtml-call "REQUEST.set('user_select', ['walkon', 'fullhouse'])"> <dtml-with bid_records> <dtml-in user_select> <dtml-if "_.str(REQUEST.form['selection']) == _['sequence-item']"> <dtml-with "_['sequence-item']"> <dtml-call "REQUEST.set('cur_bidder', bidder)"> </dtml-with> <dtml-elif "_['sequence-index'] == -1> <dtml-with snoopy> <dtml-call "REQUEST.set('cur_bidder', bidder)"> </dtml-with> </dtml-if> </dtml-in> </dtml-with>

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Q: Advantages of storing ZODB in RDBMS
by Daniel Dittmar 13 Oct '00

13 Oct '00

Can anyone explain what the advantages are of using an RDBMS for Zope object storage over the standard file system storage? Is it simply the convenience to have the data in one place (for backup etc)? Does it scale better? In connection with ZEO? I'm asking because I'm contemplating writing such a storage for a specific RDBMS and I would like to know whether it's worth the trouble. Daniel Dittmar

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Help Debugging External Methods
by Robert_J_Roberts＠rl.gov 13 Oct '00

13 Oct '00

What are my options for debugging External Methods in Zope running on Windows NT? Is there ANY way to get the external method to run in a DOS window that I can watch? What little tricks/techniques have others use to make debugging external methods easier/possible? Thanks, Robert J. Roberts LMSI-SD&I 509.376.6343 robert_j_roberts(a)rl.gov

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dtml-with syntax question
by Geoffrey L. Wright 13 Oct '00

13 Oct '00

So here's a question from a fairly new Zope developer: I think I am finally getting a decent handle on namespace issues in Zope, and I can now with the dtml-with tag with reasonable efficacy in simple situations. But I have run into something of a brick wall on one issue. What I would like to be able to do is something like this: <dtml-with objectName1> <dtml-var attribute1> <dtml-var attribute2> <dtml-var attribute3> <dtml-with folder.subFolder.objectName2> <dtml-var attribute1> </dtml-with> </dtml-with> Where objectName2 is actually an attribute of objectName1. I figure I _should_ be able to do this, and I'm sure I'm missing something obvious. But I spent about a half hour scanning the Zope.org site and the list archives and can't find an obvious example of this. Any thoughts, hints or HOWTOs? Thanks! //glw

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Ability to catalog "localFS objects" in the portal catalog
by neeloy_saha 13 Oct '00

13 Oct '00

Hi all, I have lots of old html/ documents that I want to publish through my zope portal. To ensure that I do not tweak html files I have used the LocalFS product, also I do not want to load the data.fs Now. I am running into search problems. How do i do a search the filesystem file? and also ensure that the search results come from both the filesystem files and the portal zcatalog.?? Thx and regards. -neeloy

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LoginManager - how does it work?
by ed colmar 13 Oct '00

13 Oct '00

I've managed to get loginManager to install, but I am very confused as to what to do with it. I've read the how-tos on zope.org, and the documentation of LoginManager itself... But I still don't understand what is supposed to happen. A User Source is a location to find users, Say, my SQL database, right? How do I tell it to use the SQL methods I have for retrieveing passwords? The how-tos say to create dtml-methods called "userAuthenticate" "userExists" and "userRoles". Where do these go? Can anyone help me see the light on this? Thank you

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Authentication headers & firewall port redirection
by Roland C. Reumerman 13 Oct '00

13 Oct '00

As stated in an email some time before I ran into some problems concerning accessing my password protected Zope site. The situation: * Zope 2.2.2 runs on a web server called www.datadistilleries.com on port 8080 * the web site it offers is protected with Zope's own authentication mechanism * the firewall redirects any HTTP requests for www.datadistilleries.com/ddsn (i.e., port 80) to www.datadistilleries.com:8080/ddsn. However, one has to click 3 times on that Login link before the login dialog appears. Then it seems to build up a connection, but doesn't. I click on the login link again, and I'm in and everything works as expected. Now it seems that somehow the combination of Zope-generated authenticated headers and the firewall redirection rule do not match: does the header include URL information? That would imply it tries to access www.datadistilleries.com:8080/ddsn (Zope generated port) instead of plainly www.datadistilleries.com:80/ddsn (firewall listen port). BTW, it cannot run on port 80 because the default web server is already listening to that port. Question: is it possible to somehow make Zope send HTTP authentication headers that have port 80 included instead of port 8080? _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com.

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Database Pack
by J�lio Dinis Silva 13 Oct '00

13 Oct '00

Hi all, is there a way to do a pack to zodb without using the managment screens pack button? Maybe a python script we could execute from the file system. Regards, Júlio Dinis Silva _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com.

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ZCatalog question. boolean and wildcards.
by Hannes Grund 13 Oct '00

13 Oct '00

Im running Zope 2.2.2 on Linux 2.2.13. When mixing boolean operators and wildcards '*' in queries within a Textindex the 'AND' operator is replaced by 'OR'. Also, the possibility of constructing nested terms using brackets seems to be not supported (contrary to the chapter 'Searching and indexing' from the Zope book). The setting is straightforward, several indexes (text-index, keyword-indexes) are used indexing a about 5000 Zclasses. Are there any patches to apply or what else can i do ? Thanks in advance. Hannes.

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