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RE: [Zope] Unique Identifiers for Zope Objects
by Chris McDonough 26 Jun '00

26 Jun '00

> I'm looking for an internal globally unique identifier for > objects in my > Zope store. The object path would be that. > I know that I can use id=object.absolute_url() to create an > identifier and > then <something>.resolve_url(id) to recover the object from > the identifier > -- but I have two problems with this API: > > 1. The URL is not really a global identifier, as resolving it seems to > depend on the <something> from which I call resolve_url(). > In particular, > if the id is created when Zope is running normally (as a service), and > resolved when running Zope from the command line debugger, the resolve > fails. This is not good. Yes, the REQUEST object is not available during a command line session. This can be a real pain. What you can do is (in Zope 2.2) use 'unrestrictedTraverse()' and 'restrictedTraverse()' in combination with the string.split() of the relative URL as obtained via ob.absolute_url(relative=1), e.g. ob = self.myob oburl = ob.absolute_url(1) obpath = string.split(oburl, '/') obpath.insert(0, '') # a null string as the first item in the [un]restrictedTraverse list means relative to root sameob = self.unrestrictedTraverse(obpath) (this is untested, I think it's right...) > 2. The need to locate an object <something> carrying the resolve_url() > function is a problem; in particular, I would find it helpful > if I could > resolve my global identifier from within a __setstate__() > method (where I > have no access to local Zope variables), so I really want a > genuinely global > function for resolving my id. > > Any suggestions, or do I have to dig into the (disagreeable > and uncommented) > bowels of Zope and write my own? Well... if you don't plan on using mountable database features within Zope, each Zope object will have an attribute "_p_oid", which is the 64-bit object id (stored as a string) that is used by the storage to keep current and historical revisions to the object. It's not recommended that you base an extensible system on this attribute, however, because using multiple storages within a single Zope instance (such as when you use mountable databases) almost guarantees that this identifier will not be unique. I believe that mountable databases in Zope will quickly become a common implementation practice. I wouldn't suggest writing your own GUID generator for general-purpose Zope objects. I would promote the use of [un]restrictedTraverse and use the object path as a unique ID. See also: http://www.zope.org/Members/michel/Projects/Interfaces/Traversal and http://www.zope.org/Members/michel/Projects/Interfaces/ObjectPublishing

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More verbose zope errors
by Riku Voipio 26 Jun '00

26 Jun '00

Hi, Is there any way to meke Zope be more verbose when hitting errors? Something like: Error Type: TypeError Error Value: illegal argument type for built-in operation <rant> Sucks it ass off to find where it came from. What operation? what argument? what line? Another mayor annoyance is that the sql used is shown when calling for dtml documents, but if if we have a chain dtml-doc->dtml-meth->zsql-meth, only the oracle error is shown.... </rant> -- Riku Voipio riku.voipio(a)tietoenator.com 09-862 60764

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URL parsing error in 2.2.0b2
by T.J. Mannos 26 Jun '00

26 Jun '00

I used to be able to use URLs like this in Zope 2.1.6: http://mysite.com/somepage?url=http://somewhere.com In Zope 2.2.0b2, I get a "404 File Not Found" error. Do I need to URL-quote the address now?

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Re: [Zope] Zope 2.1.6 Bug?
by Anders Holmbech Nielsen 26 Jun '00

26 Jun '00

hi, this is a strange error. I have just tried on my win nt 4.0 Zope 2.1.6 with the same result. >I'm running Zope 2.1.6 under Windows 2000. I've encountered a >situation where I can cause Zope to completely hang. For example, >if I create a DTMLMethod called test in the root folder and give it >this contents (leading spaces on the table tag are important): > > <table width="100%" border="0" cellspacing="0" cellpadding="0"> > <tr> > <td>Hello</td> > </tr> > </table> > >and click the View tab, the page displays as expected. However, if >I edit this to look like this: > > <table width="100%" border="0" cellspacing="0" cellpadding="0"> > <tr> > <td>Hello</td> > </tr> > <tr> > <td>Goodbye</td> > </tr> > </table> > >and click View, Zope goes off and never returns. The Python.exe >file continues to consume CPU but doesn't display anything. > >However, if I remove the leading spaces before the table tags, save >my changes and then click View, the contents are displayed >immediately. I then experimented with adding one space before the >tag. The contents displayed, but after a pause. Two spaces paused >longer. > >Can anyone else verify this behavior? > >Thanks. > >James W. Howe mailto:jwh@allencreek.com >Allen Creek Software, Inc. pgpkey: http://ic.net/~jwh/pgpkey.html >Ann Arbor, MI 48103 > > >_______________________________________________ >Zope maillist - Zope(a)zope.org >http://lists.zope.org/mailman/listinfo/zope >** No cross posts or HTML encoding! ** >(Related lists - http://lists.zope.org/mailman/listinfo/zope-announce >http://lists.zope.org/mailman/listinfo/zope-dev ) -- Regards ------------------------------------------------- Anders Holmbech Nielsen | Tlf: (+45) 70 22 56 00 Software Engineer | Fax: (+45) 70 22 57 00 Integrator Uniware A/S | http:/www.integrator.dk

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RE: [Zope] help a zope newbie
by Chris McDonough 26 Jun '00

26 Jun '00

> I have seen few site powered by Zope. One thing I had noticed > is that almost > all of those sites are mostly static pages. I mean I am > interested to see > how can Zope be used for a portal. like containing many pages > having lots of > form variables. database connectivity etc. what is the > performance then. While it may appear that these sites are "static", they are probably very dynamic. Sites based exclusively on Zope do not serve *any* static content, all content is generated dynamically. See http://www.codecatalog.com for an example of a site which does a lot of forms processing and database lookups. It is based on Zope.

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Zope 2.1.6 Bug?
by James W. Howe 26 Jun '00

26 Jun '00

I'm running Zope 2.1.6 under Windows 2000. I've encountered a situation where I can cause Zope to completely hang. For example, if I create a DTMLMethod called test in the root folder and give it this contents (leading spaces on the table tag are important): <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td>Hello</td> </tr> </table> and click the View tab, the page displays as expected. However, if I edit this to look like this: <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td>Hello</td> </tr> <tr> <td>Goodbye</td> </tr> </table> and click View, Zope goes off and never returns. The Python.exe file continues to consume CPU but doesn't display anything. However, if I remove the leading spaces before the table tags, save my changes and then click View, the contents are displayed immediately. I then experimented with adding one space before the tag. The contents displayed, but after a pause. Two spaces paused longer. Can anyone else verify this behavior? Thanks. James W. Howe mailto:jwh@allencreek.com Allen Creek Software, Inc. pgpkey: http://ic.net/~jwh/pgpkey.html Ann Arbor, MI 48103

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Re: [Zope] Internationalization
by Dieter Maurer 26 Jun '00

26 Jun '00

Dan Rusch writes: > We have a site that is composed of several hunderd pages. We don't use > classes but we have made heavy use of aquistion though. For example we > have one back button that is aquired thoughout the site etc etc. > Basically if the functionality (or code) is used in more than one place > it has been but into a method and aquired. Aquisition should play well with internationalization. You would put the localization into the aquired objects. If the language information is e.g. in a cookie, you could use its value to select the various language variants of your object. If the language information is in the URL, I probably would extend the Zope folder class to a LangFolder. It would behave exactly likes a normal folder, but would add an "LANGUAGE" variable to the REQUEST object during traversal. To select the correct localization of an object, you could have language folders for each language containing the localizations for the respective language. If we assume, that all the id's are unique, DTML code similar to this can be used for selection: <dtml-with "_[LANGUAGE]"> <dtml-var "_[id]"> </dtml-with> Dieter

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embed an SQL method inside a <dtml-in> tag
by wai＠mahirnet.com 26 Jun '00

26 Jun '00

Hi, I tried to embed an SQL method statement inside my <dtml-in> listing, the problem I'm facing was, will Z sql method detact the value I passed in, let say : # This is my first listing <dtml-in abc_sql_statement> #another sql_statement <dtml-in bcd_statement> <dtml-var xyz> <dtml-in> </dtml-in> # The bcd_statement will not be requested by a form The reason being I do this is because I need to do some interaction in the results of bcd_statement. Any one can help or done this before ?? Please help. Cheers Wai

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Problem with the datatype "lines"
by Michael Rehn 26 Jun '00

26 Jun '00

Hi Zopers, I have found out that when using the datatype "lines" in my own ZClass it won't obey to the locale settings. That means that the words coming from "lines" look like: t/370nk. And therefore they don't get correctly indexed in the database. I'm running Zope 2.1.6 (on both linux and winnt 4.0). Is there an update to this problem or a workaround ? Thanks in advance -- Regards ------------------------------------------------- Anders Holmbech Nielsen | Tlf: (+45) 70 22 56 00 Software Engineer | Fax: (+45) 70 22 57 00 Integrator Uniware A/S | http:/www.integrator.dk

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Translator package/project died or what ?
by Holger Lehmann 26 Jun '00

26 Jun '00

Hi everyone, especially J. David Ibáñez and Federico Di Gregorio :-) Since Federico did not reply to my mail I am posting this on the list to gain responses. We **need** a translator package for Zope. We will be hosting a site that will have the feature to "speak" different languages. So I got Translator-0.5.tar.gz from somewhere (do not ask me where, I forgot). Unpacked it and restarted Zope. The product is broken since it tries to import: from Shared.xmlio import XMLio But this is obviously not available (I tried finding it on zope.org and with google/altavista). The only available xml package is in DC.xml and is based on xmllib. Now here is the question: Does anyone have the XMLio stuff ? If so can this someone be so nice and either post the URL here or make it available and post the URL here ? If all this is in vain and that package will not be developed any further, can someone tell me if there is another solution out there ? - TIA Holger -- ----------------------------------- catWorkX GmbH Hamburg Dipl.-Ing. Holger Lehmann Stresemannstr. 364 22761 Hamburg Tel: +49 40 890 646-0 Fax: +49 40 890 646-66 mailto:lehmann@catworkx.de http://www.catworkx.de http://www.catbridge.de

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