February 2000 - Zope

Installation help
by Lucas Vogel 20 Feb '00

20 Feb '00

Hello, I am trying to install Zope on my machine(SuSE 6.3, apache 1.3.9) with FastCGI and am having a very tough time. The first time I tried it was with the RPM's, but I couldn't really figure out what was going on with those so I uninstalled them, thinking that if I tried the installation from the source I would have a better understanding of Zope configuration and be able to install it the 'right' way. So now I'm about halfway through the installation, trying to set up Zope to use Apache and fastcgi, and I think I'm stuck. Fastcgi has been set up and is running(the 10/06 snapshot as required), and I am to the point in the WEBSERVER.TXT file where I choose whether I have Apache or ZServer handle the requests(?). I have all of my Zope source in a /usr/src directory since I've been putting it together, and am looking at what my next step would be. If anyone could help me out or point me in the right direction I would be very grateful. Thank you -- Lucas Vogel lucas7(a)home.com ICQ: 44697169

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Re: [Zope] Syntax: Learning from JSP's problems
by Tres Seaver 20 Feb '00

20 Feb '00

Michael Bernstein <webmaven(a)lvcm.com> wrote: <snip> > The one thing that DTML lacks is a simpler way of passing parameters to > methods. I would suggest allowing syntax such as <dtml-tag a > name="&value;"> to pass name/value pairs into methods (including python > methods) letting the target methods worry about validating incoming > parameters and default values. this would be much clearer than using the > current REQUEST syntax. We could perhaps hack the var tag to pass along any non-standard attributes as keyword arguments: <dtml-var myMethod foo="bar"> # inject foo="bar" into myMethod's namespace Of course, then we have to escape the standard attributes used by the var tag itself, or else decorate all the "keyword" attributes: <dtml-var myMethod dtml:foo="bar"> Such a syntax would remove most of the need for the expr="" stuff, which requires that unintuitive '( _.None, _, ...)' bit. It replaces some uses of the let tag, too, although I often have the let active across a whole method. -- ========================================================= Tres Seaver tseaver(a)palladion.com 713-523-6582 Palladion Software http://www.palladion.com

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Calculations within a document
by Boris Povazay 19 Feb '00

19 Feb '00

Since I am a "Zope-Beginner" I am currently faced with some problems - maybe you can help me with these. Declarations & type-conversions: How are variable-declerations done right within dtml? Like: float x; or: int x; float y; y=float(x); Calculations: How are iterative calculations with variables done correctly in a dtml-Method? like: float x, x=0; x=x+1 Especially the type-conversion puzzles me. I`ve read several Zope-docs, but I have still not figured out how to do this. Thanks a lot in advance for your reply! -- Boris Povazay

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(no subject)
by Jerry 19 Feb '00

19 Feb '00

Martijn Pieters wrote : >What do you need load balancing for anyway? Is it for scalability, or >for reliability? I'm glad you asked, I think meny potential Zope users have their own answers, each with situation specifics. Mantra for IT components, "One (of anything) is not enough". For me, reliability is the most critical (as in MISSION CRITICAL) point. Scalability will never become an issue if reliability isn't there first. Why? Because Zope will never be adopted as a production system, without redundancy, failover, etc. >If you want scalability, surely the cost for ZEO can be justified? Not really. There are two price points. A lot, and A lot * 2. I have expressed the need to start ZEO at a two server license, with a corresponding price. Then Zope could get the chance to prove it's worth, grow in percieved value, and to scale as needed. As things are, Zope hopefuls are sitting out because of missing redundancy, failover. That's also why I keep pointing out every possible means of simulating ZEO features on this list, at every opportunity. If one site get's Zope into production using some of these half measures, that's one more potential future ZEO customer. Otherwise, we'll never get far enough to "need" ZEO, in it's current form. >Also, do realize that Zope on a single machine can scale pretty awesome. >We recon ZEO is only necessary for the absolute top range of websites. That's another thing. Zope does great at throughput, but responsiveness isn't always up to expectations, for LAN based IntraNet users. A noticable speed improvment by load balancing across two ZEO servers could go a long way toward making a "full" ZEO license look "justified". Thanks for asking! Jerry S.

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Searching ZCatalog
by Lauri Posti 19 Feb '00

19 Feb '00

Hi, Is it possible search TextIndex using regexp or something similar? I need to perform query like 'Effect%' that should match ['Effect', 'Effective', 'Effectivly'].. etc (similar to SQL 'LIKE' ). If this feature is not currently implemented, then can anybody give some hints how to do it, eg what classes have to be changed? Lauri

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A question about Zope architecture....
by jiva＠devware.com 19 Feb '00

19 Feb '00

With Zope's acquisition model, doesn't it lead to a horribly cluttered root folder? How do you avoid getting the root folder cluttered with a bunch of junk just because it's used in sub projects underneath it? -- If we all work together, we can totally disrupt the system.

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bug or feature?
by Sam Gendler 19 Feb '00

19 Feb '00

I have a very compmlex and expensive query that returns a large number of results, which are batched across many pages. When I don't enable caching, the database gets queried once for every next page (of which there are many), so I tried to enable caching. Now I get the same results on every page. This seems to me to be a bug, since I would expect the query to be able to display any subset of the results stored in the cache. Does anyone know a workaround that doesn't require Zope to hit the DB on every page, or am I SOL. --sam -- -------------------------- Sam Gendler CTO, Impossible, Inc. 1222 State St. Suite 250 Santa Barbara, CA. 93101 p: 805-560-0508 f: 805-560-0608 c: 805-689-1191 e: sgendler(a)impossible.com

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advanced SQL properties question
by Sam Gendler 19 Feb '00

19 Feb '00

Does the 'maximum number of results to cache' value refer to the number of different result sets that get cached for the same ZSQL method, or is it the number of rows that get cached? Also, is spacew pre-allocated, so do I want to worry about setting values too high for queries that will only ever return a single result set, or does it not matter? If I set the max rows to 0, does that return an infinite number of rows? --sam -- -------------------------- Sam Gendler CTO, Impossible, Inc. 1222 State St. Suite 250 Santa Barbara, CA. 93101 p: 805-560-0508 f: 805-560-0608 c: 805-689-1191 e: sgendler(a)impossible.com

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Problem with new Banner System (and workaround
by Bill Anderson 19 Feb '00

19 Feb '00

Umm ... seem to have generated an issue with Renderable in the first traceback. If I put my new banner product into use with <dtml-var VBanner>, I get this: Traceback (innermost last): File /home/web/www.libc.org/lib/python/ZPublisher/Publish.py, line 214, in publish_module File /home/web/www.libc.org/lib/python/ZPublisher/Publish.py, line 179, in publish File /home/web/www.libc.org/lib/python/Zope/__init__.py, line 202, in zpublisher_exception_hook (Object: ApplicationDefaultPermissions) File /home/web/www.libc.org/lib/python/ZPublisher/Publish.py, line 165, in publish File /home/web/www.libc.org/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: Main) File /home/web/www.libc.org/lib/python/ZPublisher/Publish.py, line 102, in call_object (Object: Main) File /home/web/www.libc.org/lib/python/OFS/DTMLDocument.py, line 166, in __call__ (Object: Main) File /home/web/www.libc.org/lib/python/DocumentTemplate/DT_String.py, line 502, in __call__ (Object: Main) File /home/web/www.libc.org/lib/python/OFS/DTMLMethod.py, line 141, in __call__ (Object: standard_html_header) File /home/web/www.libc.org/lib/python/DocumentTemplate/DT_String.py, line 502, in __call__ (Object: standard_html_header) File /home/web/www.libc.org/lib/python/OFS/DTMLMethod.py, line 141, in __call__ (Object: LeftColumn) File /home/web/www.libc.org/lib/python/DocumentTemplate/DT_String.py, line 502, in __call__ (Object: LeftColumn) File /usr/lib/zope/lib/python/Products/Renderable/Renderable.py, line 10, in __str__ (Object: Renderable) TypeError: (see above) If I use: <dtml-var "VBanner()"> I get: <!-- Traceback (innermost last): File /home/web/Vhosts/lib/python/ZPublisher/Publish.py, line 214, in publish_module File /home/web/Vhosts/lib/python/ZPublisher/Publish.py, line 179, in publish File /home/web/Vhosts/lib/python/Zope/__init__.py, line 202, in zpublisher_exception_hook (Object: ApplicationDefaultPermissions) File /home/web/Vhosts/lib/python/ZPublisher/Publish.py, line 165, in publish File /home/web/Vhosts/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: index_html) File /home/web/Vhosts/lib/python/ZPublisher/Publish.py, line 102, in call_object (Object: index_html) File /home/web/Vhosts/lib/python/OFS/DTMLMethod.py, line 145, in __call__ (Object: index_html) File /home/web/Vhosts/lib/python/DocumentTemplate/DT_String.py, line 502, in __call__ (Object: index_html) File /home/web/Vhosts/lib/python/DocumentTemplate/DT_Util.py, line 335, in eval (Object: VBanner()) (Info: VBanner) File <string>, line 0, in ? AttributeError: (see above) If I call it directly, all is fine. Or if I use <dtml-var "VBanner.get_banner()"> it works as expected. Any ideas? What went wrong? TIA, Bill -- In flying I have learned that carelessness and overconfidence are usually far more dangerous than deliberately accepted risks. -- Wilbur Wright in a letter to his father, September 1900

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Base href (AGAIN)
by Sam Gendler 19 Feb '00

19 Feb '00

I don't have access to my email archive, so I can't search, and the eGroups search returns 1400 messages, so can someone briefly send me a note about how to get rid of the base href at the top of every document? --sam -- -------------------------- Sam Gendler CTO, Impossible, Inc. 1222 State St. Suite 250 Santa Barbara, CA. 93101 p: 805-560-0508 f: 805-560-0608 c: 805-689-1191 e: sgendler(a)impossible.com

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