August 1999 - Zope-Dev

database memory concerns
by Joerg Wittenberger 05 Aug '99

05 Aug '99

Hello folk, For evaluation purpose I've got a zope installation working about 2 weeks ago. I did not do too much, just about 1M worth of data (my old home page and some docs) thrown in and installed a squishdot site for test purpose. Thist blew the data base to approx 29M!!! Now I wanted to move most of it, actually one folder, into the new version. Because I already hit to many minor problems, I decided not to experiment with copying the old data base over the new one. Instead I exported my data (still not much more that 1M worth). This grew it to 39.95 MByte! After reimporting the whole thing into the new data base, the latter weights in with 14M, buh, at least a bit saved. Hm, now I'm a bit afraid of what's going on. Im considering zope, because it might be a choice for a valuable amount of documents. But those are approx. 2GByte of text files spread over something like 200K files. Given the above experience I have to expect 60GByte of disk usage. True? BTW: what gets stored in the spare bits? I should mention that I decided to use the gadfly data base, because I did not find any hints in the docs, why I should use the one or the other. Only a short note, which seems to indicate that other data base adaptors might be broken with the new version (V2 of zope). Moreover I'm a bit concerned about scalability issues. I could not find any note at all at that topic. How much can I expect zope to handle? I have approx 100 users accessing, searching, extending the above mentioned 2GB data. The required solution should at least indicate that, after 10 years and another 20Gbyte it's still working. thanks a lot /Jerry

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Bug
by Joerg Wittenberger 05 Aug '99

05 Aug '99

Hello folks, I just tried to install zope 2.0.0b1. Here my first problem: $ python zpasswd.py access Username: superuser Password: Vefify password: Please choose a format from: SHA - SHA-1 hashed password CRYPT - UNIX-style crypt password CLEARTEXT - no protection. Encoding: crypt Domain restrictions: localhost Traceback (innermost last): File "zpasswd.py", line 251, in ? if __name__=='__main__': main(sys.argv) File "zpasswd.py", line 241, in main access_file.write(username + ":" + File "zpasswd.py", line 112, in generate_passwd return pw NameError: pw Any clue? thanks a lot /Jerry

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RE: [Zope-dev] WARNING: Zope 2.0b2 considered harmful to ZClasses
by Brian Lloyd 05 Aug '99

05 Aug '99

> > Ouch. One thing: zope.org/Download/ still links to beta 2, > now a broken link. > > -- > Martijn Pieters Thanks - I've fixed that. Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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Product variable values
by kent＠tiamat.goathill.org 05 Aug '99

05 Aug '99

Is it possible to have class variables in a Zope Product which : 1) are not stored in the object database 2) are reliably updated and retained throughout the life of a zope session when called by _bobo_traverse__() I've written an example Zope Product to investigate these issues and cannot determine a reliable way to achieve the desired results. '_v_name' values are only *sometimes* retained from one http get (via _bobo_traverse__() )to the next so those are out. I can't determine a pattern to when they are and when they are not. Sometimes, with two almost identical names, one's value is retained while the other's is not. 'name' values are *sometimes* retained from one get to the next within a _bobo_traverse__(), and again, I can't identify when or why. However, changes to 'name' variables are stored in the Zope database, so that's also out. Thanks

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Zope 2.0.0 beta 2 is available
by Jim Fulton 05 Aug '99

05 Aug '99

Zope 2.0.0 beta 2 is available for download at: http://www.zope.org/Download/Releases/Zope-2.0.0b2 See the change history for a list of changes. Jim -- Jim Fulton mailto:jim@digicool.com Python Powered! Technical Director (888) 344-4332 http://www.python.org Digital Creations http://www.digicool.com http://www.zope.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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RE: [Zope-dev] CatalogAware must come before ObjectManager
by Michel Pelletier 05 Aug '99

05 Aug '99

> -----Original Message----- > From: Kevin Dangoor [mailto:kid@kendermedia.com] > Sent: Wednesday, August 04, 1999 10:27 PM > To: zope-dev(a)zope.org > Subject: [Zope-dev] CatalogAware must come before ObjectManager > > > I don't know if this is a bug, or simply a function of how > things work... > but it appears that a ZClass must list CatalogAware as a base > class before > ObjectManager if you wish the CatalogAware functionality to > be there. If > this is expected behavior, then this should probably be documented... This is the intended behavior. Both ObjectManager and CatalogAware define a manage_afterAdd method. The CatalogAware class must be subclassed first in order for it's afterAdd to be called instead of ObjectManagers. This is identical behavior to python. You're right, it should be documented. > > BTW, will it ever be possible to change the Base classes of a ZClass? > It is possible, but only from python, and it is a *real* hack. Doing this is completely unsupported. I might get shot for revealing the technique. Given a Product called 'YourProduct' that contains a Zclass called 'YourZClass' that you want to 'rebase', first, create a temporary ZClass called 'TempZClass' in the same product. 'TempZClass' should be built with the new order or types of subclasses that you want 'YourZClass' to have. Note that 'TempZClass' need not have anything in it, it just needs to subclass the right classes. Shut down Zope, run python1.5.2 in your lib/python directory, and execute the following code: >>> import Zope >>> p = Zope.app().Control_Panel.Products.YourProduct >>> p <Product instance at 849de28> >>> p.YourZClass._setBasesHoldOnToYourButts(p.TempZClass._zbases[1:]) >>> get_transaction().commit() -Michel > Kevin > > > _______________________________________________ > Zope-Dev maillist - Zope-Dev(a)zope.org > http://www.zope.org/mailman/listinfo/zope-dev > > (To receive general Zope announcements, see: > http://www.zope.org/mailman/listinfo/zope-announce > > For non-developer, user-level issues, > zope(a)zope.org, http://www.zope.org/mailman/listinfo/zope ) >

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SQL METHODS - Obtaining ROW IDS in an <IN> STATEMENT
by Theodore Patrick 05 Aug '99

05 Aug '99

Here is the situation: I have a method called item_method. It contains SQL:SELECT that returns 10 rows of data. When I want to print this to a page in ZOPE. I use an <IN> Statement as follows. Currently the data set from the database does not return a row number, so I need Zope to make one up as it prints the HTML. The data set has two columns called this and that. I need the code that generates the  in the following code.  ROW_NUM=  THIS=, THAT=  As always - Thanks in Advance. Theodore E. Patrick http://www.ishophere.com Where do you shop?

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RE: [Zope] SQL METHODS - Obtaining ROW IDS in an <IN> STATEMENT
by Theodore Patrick 05 Aug '99

05 Aug '99

DONE THANKS A TON - I owe you one! -----Original Message----- From: Tony McDonald [mailto:tony.mcdonald@ncl.ac.uk] Sent: Thursday, August 05, 1999 8:47 AM To: Theodore Patrick; 'zope(a)zope.org'; zope-dev(a)zope.org Subject: Re: [Zope] SQL METHODS - Obtaining ROW IDS in an <IN> STATEMENT At 8:20 am -0500 5/8/99, Theodore Patrick wrote: >Here is the situation: > >I have a method called item_method. It contains SQL:SELECT that returns 10 >rows of data. When I want to print this to a page in ZOPE. I use an <IN> >Statement as follows. Currently the data set from the database does not >return a row number, so I need Zope to make one up as it prints the HTML. >The data set has two columns called this and that. I need the code that >generates the  in the following code. > >  > ROW_NUM=  THIS=, THAT= >  > Try <dtml-var sequence-index>, ie ROW_NUM= THIS= etc etc. hth tone ------ Dr Tony McDonald, FMCC, Networked Learning Environments Project http://nle.ncl.ac.uk/ The Medical School, Newcastle University Tel: +44 191 222 5888 Fingerprint: 3450 876D FA41 B926 D3DD F8C3 F2D0 C3B9 8B38 18A2

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how to call overridden method of super-zclass?
by Martijn Faassen 05 Aug '99

05 Aug '99

Hi there, Imagine I have two ZClasses, ZClass A and ZClass B. ZClass B derives from ZClass A. Now if ZClass A has a DTML Method 'foo' and I override this DTML Method inside ZClass B, how can I still access this method from within the overridden method? Basically I want to refine methods, keeping the functionality of the superclass but adding some new functionality of my own. Regards, Martijn

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using overridden docs
by Robin Becker 05 Aug '99

05 Aug '99

Is there any way to use an over-ridden document ie I want to include the contents of the acquired standard_html_header within the current folder's standard_html_header I want to use this for the current folder ie override one property <dtml-var standard_html_header> <dtml-call "RESPONSE.setHeader('content-type','text/html')"> -- Robin Becker

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