June 2001 - Zope-Dev

<dtml-in> batching badly
by seb bacon 20 Jun '01

20 Jun '01

Hi, First, I don't post to this list normally; is it the best place to discuss an apparent bug? Anyway, the lowdown: If you iterate over a list with a batch size of 1, it messes up towards the end of the sequence. For example, the following code: <dtml-call "REQUEST.set('hoo',(1,2,3,4))"> <dtml-in hoo> calling <dtml-in hoo size=1 start=<dtml-var sequence-item>>:<br> <dtml-in hoo size=1 start=sequence-item> <dtml-var sequence-item> </dtml-in> <hr> </dtml-in> produces the following output: calling <dtml-in hoo size=1 start=1>: 1 calling <dtml-in hoo size=1 start=2>: 2 3 4 calling <dtml-in hoo size=1 start=3>: 3 4 calling <dtml-in hoo size=1 start=4>: 4 That's not the behaviour I'd expect. Can anyone confirm this is a bug? Cheers, seb

6 6

Re: [SmartObjects] Zope Object Query Language (ZOQL) Proposal
by Philip Wadler 20 Jun '01

20 Jun '01

I play an active role in the W3C working group designing XQuery, a query language for XML. I'm not familiar with ZOPE and it's query language. Who should I meet with to learn more? If XQuery doesn't meet the needs of the ZOPE team, I'd like to understand why. If there are missing features important to our needs, I can argue to get them added to XQuery. Cheers, -- P

1 0

ZCatalog phrase indexing revisited
by Oren Yosifon 20 Jun '01

20 Jun '01

Hi all, I'm asking this again ,in case anything has changed since the last time. I'm trying to search for a phrase in ZCatalog, but, it doesn't seem to work. Let's say I want to search for "foo bar", if i ask ZCatalog to find it, it treats it as if I wrote "foo OR bar" . Last time I asked this, SteveA kindly replied: You should use quotes to group the phrase. ['"foo bar"'] Take a look in the source code: lib/python/SearchIndex/UnTextIndex.py Follow the flow of code through from line 550: def query( ... however, this doesn't seem to work. You can try it even on the zope.org website using their search interface. Using the above suggested syntax (incl. the brackets) returns an error message. Can anyone help me ? Thx. oren.

9 23

command-line zope.org product upload ?
by Simon Michael 20 Jun '01

20 Jun '01

If you have a recipe or script or ideas for this, I'd appreciate it. I have a non-functional makefile recipe that currently looks like this - echo id=$(PRODUCT)-$(VERSION).tgz\nfile=`cat releases/$(PRODUCT)-$(VERSION).tgz | \ python -c "import sys,urllib; print urllib.quote_plus(sys.stdin.read())"` \ | TERM=vt100 lynx -post_data -auth=$(USERZOPEORG):$(PASSZOPEORG) -term=vt100 \ -dump http://zope.org/Members/simon/ZWiki/manage_addProduct/ZopeSite/Release_fact… \ >.log (Oh please! shoot me now! :)

3 5

RE: [SmartObjects] Zope Object Query Language (ZOQL) Proposal
by Jay, Dylan 19 Jun '01

19 Jun '01

> -----Original Message----- > From: Olivier Deckmyn [mailto:odeckmyn.list@teaser.fr] > Sent: Tuesday, 19 June 2001 6:47 PM > To: Stephan Richter; SmartObjects Mailing List > Subject: RE: [SmartObjects] Zope Object Query Language (ZOQL) Proposal > > > A ) Devil lawyer : > ------------------ > Why not reuse a existing standard query language ? First I'll have to say I'm bit to busy to follow the whole thread and see what the details of the query languages being discussed are. For a long time however I have believed that there is a need for a strong queury language for Zope. One that gives a powerful and consistant API and also allows for things like transparent indexing. We need something that combines the power of relational joins but also the heirachical queries like XPath. Such a query language is not a new idea and is activly being devoloped for XML. XML and ZODB are very similar. I think the gains made by reusing an XML query language would be huge. XQuery seems to be the most powerful and the most applicable and has a lot of smart people working on it. http://www.w3.org/TR/xquery/ "XML is an extremely versatile markup language, capable of labeling the information content of diverse data sources including structured and semi-structured documents, relational databases, and object repositories. A query language that uses the structure of XML intelligently can express queries across all these kinds of data, whether physically stored in XML or viewed as XML via middleware. Because query languages have traditionally been designed for specific kinds of data, most existing proposals for XML query languages are robust for particular types of data sources but weak for other types. This specification describes a new query language called XQuery, which is designed to be broadly applicable across all types of XML data sources." Can I suggest that someone have a closer look and see if this language can cover all the needs of a general ZODB query language? such as I think was suggested at the beginning of this thread http://imail.iuveno-net.de/pipermail/smartobjects/2001-June/000116.html

1 0

Proposed proposals: password encryption, ZODB RAM
by Shane Hathaway 19 Jun '01

19 Jun '01

Here are a couple of ideas I'd like to toss out. Proposals can take a lot of time to write and it might be easier this way to flesh out the details. 1) Optional password encryption. Right now passwords are stored as clear text. What's interesting is that Zope can already authenticate against SHA encrypted passwords, it just won't encrypt user passwords unless you force it to. As a test of Zope's ability to authenticate against encrypted passwords, I sneakily implemented the "inituser" changes with SHA encryption by default. That means that the password for the initial user stored in the database is not possible to decrypt and yet nobody has had any problems with it AFAIK. Since it has been successful, I'd like to suggest we add a checkbox to basic user folders that enables encryption for new passwords, and have it turned on by default. The risk is incompatibility with HTTP digest auth, which I imagine nobody is using right now. 2) If cPickle were to do something similar to "intern"-ing strings when loading objects from the ZODB, Zope might consume significantly less RAM on busy servers. ZODB uses lots of strings. ZODB caches cannot be shared among threads. But strings, being immutable, can be safely shared. We couldn't just intern the strings since that would make them immortal, but if we used weak references it could work. The only risk is the speed impact during loading of objects. Shane

3 4

Re: [Zope-dev] dtml-in batching improved
by Jean Lagarde 19 Jun '01

19 Jun '01

Good day all, I wouldn't consider myself as a Zope developper, but since that's where the thread was... I've read the thread with interest but so far all I've read in it are workarounds that I do not find particularly nice. I did find a bug w/patch in the collector (#1317), which I thought was meant to correct the problem, but the patch has been applied to my version (2.3.2), and dtml-in evidently still did not behave as expected. So I've looked at it more closely and found what I think is a fix, but given my inexperience, I would like to know if others think that I'm doing something wrong. I've tested the change for a while on my application, and everything seems to work so far. Here is the original code, with my annotated change (I deleted an if test in two places): for index in range(first,end): # preset kw['previous-sequence']= 0 kw['next-sequence']= 0 # now more often defined then previously # if index==first or index==last: # provide batching information if first > 0: pstart,pend,psize=opt(0,first+overlap, sz,orphan,sequence) deleted this test --> if index==first: kw['previous-sequence']=1 kw['previous-sequence-start-index']=pstart-1 kw['previous-sequence-end-index']=pend-1 kw['previous-sequence-size']=pend+1-pstart try: # The following line is a sneaky way to # test whether there are more items, # without actually computing a length: sequence[end] pstart,pend,psize=opt(end+1-overlap,0, sz,orphan,sequence) deleted this test --> if index==last: kw['next-sequence']=1 kw['next-sequence-start-index']=pstart-1 kw['next-sequence-end-index']=pend-1 kw['next-sequence-size']=pend+1-pstart except: pass if index==last: kw['sequence-end']=1 Cheers, Jean

2 2

define restricted list of meta types for subobjects
by zope-mailinglist 19 Jun '01

19 Jun '01

hi i made a folderish product which inherits from objectmanager to define which meta_types the user should be able to put into it i have overriden "all_meta_types" from objectmanager now only those returned from this function are displayed in the product add list in the ZMI but i can still add other subobjects when i play with the url and call the addform directly. my q: is there a method to define this subobjects via permissions without setting permissions each time a product class is instanciated i read about some "permission key" for a specific meta type. but i want to set the permissions only for a specific product, independend of the instances location thx in advance, bernd

1 0

decapitate() still needed ?
by Simon Michael 19 Jun '01

19 Jun '01

from http://zwiki.org/FrontPage: > simon - why is the antidecaptiation kludge there? > > tav - it was a temporary way around an undocumented feature of DTML > Documents, namely if your document's text begins with one or more > lines that look like a http: header, they get moved into the actual > http headers. > > Naturally it has led to complications. > > aha! > > deltab: the undocumented feature seems rather unnecessary - DTML > Documents can set their header fields through the RESPONSE object. > > db - I would dearly love for it to vanish. No time to raise the issue > on zope-dev or tracker right now though --SM Well, I guess that's not true. Raising it here. -Simon

1 0

better history diff output ?
by Simon Michael 19 Jun '01

19 Jun '01

Hi all, I want to highlight a wiki page's last changes, so I have a need for a better display of diffs between two revisions. Can you recommend any good free diff code out there with nice html output ?

1 1