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meta type conversion method, Document to Method... help!
by Alex Schonfeld 24 Feb '00

24 Feb '00

Basically the idea is to have it go through and convert all dtml docs to dtml methods. BUT the problem is "index_html" of Document type also have a attribute ".index_html" which is causing problems with the conversion. Thus my special case code. Any ideas or tips would be appreciated. This code is being used to convert all the old style docs to methods for use with Zope2. Thanks! --------------convermetatypes, DTML Method---------------- <html> <body> <dtml-let from_type="'DTML Document'" to_type="'DTML Method'" tmpindex="_.getitem('index_html',0)" tmpraw="tmpindex.raw"> <dtml-comment> and update the called methods............... </dtml-comment> <dtml-in "objectValues(from_type)"> <dtml-let method="_.getitem('sequence-item', 0)" method_id="method.id()" method_title="method.title" method_data="method.raw"> <dtml-if "method_id != 'convertmetatypes'"> Deleting <dtml-var from_type>-<dtml-var method_id>. <dtml-call "manage_delObjects([method_id])"> <dtml-call "manage_addDTMLMethod(id=method_id, title=method_title)"> Creating new <dtml-var to_type>-<dtml-var method_id>. <dtml-let newdoc="_.getitem(method_id,0)"> <dtml-if "newdoc"> Adding data to new <dtml-var to_type>-<dtml-var method_id>. <dtml-call "newdoc.manage_edit(data=method_data, title=method_title)"> <dtml-else> Adding data to new <dtml-var to_type>-<dtml-var "tmpindex.id()">. <dtml-call "tmpindex.manage_edit(data=tmpraw, title=tmpindex.title)"> </dtml-if> </dtml-let> </dtml-if> </dtml-let> </dtml-in> </dtml-let> </body> </html> ---------------------- 1010011010 0 Digital Garage 1 Alex Schonfeld 0 alex(a)garage.co.jp - pear 1 090-4429-2323 +-Personal Junk | alex(a)coolest.com | http://www.coolest.com

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Re: [Zope-dev] Zope Debugging Tips Solicited
by Hung Jung Lu 24 Feb '00

24 Feb '00

"james w. howe" <jw-(a)allencreek.com> wrote: >I can do with it. Any debugging tips that anyone might have would be >appreciated. The Python/Zope combination does not seem to have any nice GUI for debugging... nothing like Visual C++ or Visual Cafe. But then, I have also worked with a few languages where I had only access to simple print statements... At first this might seem to be primitive, but one thing saves the day: in these languages you can modify most program files while the main application is running, like the case of Zope. (Long-running processes.) What I do nowadays for Zope is this: (1) In the standard_footer_html method (or equivalent), I print out whatever variable I want to print out. This includes a string that I store in the REQUEST variable, which you may call debug_output. Typically I print out three things: (a) REQUEST.debug_output, (b) the SESSION variables, (c) the REQUEST variable. (2) I have a flag in the root folder, and setting or unsetting this flag enables or disables the print out. So, when I move the development copy to the production copy, I simply have to unset the flag to suppress the debug printing. (3) I implement an external method called dprint(), and put it in the root folder. This method prints into the REQUEST.debug_output string. I can print from any dtml method/document, something like: <dtml-call "dprint('Hallo I am here')"> <dtml-call "dprint(REQUEST.myvar)"> You of course can also call the dprint() method from within external methods... or maybe you can implement it as a real Python module and put it inside your /lib/python/shared/... folder so you can import it from an external method file. --------------------------- The above method is good only if the program does not have crashes (Zope exceptions.) For nastier crashes, I physically go into the Python code and put print statements, so it prints to the console. Primitive, yes, but so far I have always been able to catch the bugs I wanted to catch, including a few from Zope itself and Sybase database adapter. --------------------------- Of course, if there were some product that implements a real debug para-server (serving on a TCP/IP port, so it's platform independent) with nice HTML GUI interface to poll (or even change) variable values via a web, and even stepping through the code, now, that'll be a wonderful product. :) Hung Jung ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

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Re: [Zope] Private Product Objects (was: object icons)
by Tres Seaver 24 Feb '00

24 Feb '00

Loren Stafford <lstaffor(a)dynalogic.com> writes: > > Now that I've had breakfast and thought about this a little more, I see > there is broader issue: how to handle the special needs of objects that are > private to a product. My product is an event scheduler. (Terry, who started > the "object icons" thread, may have a different situation. Jump in and tell > us about your product, Terry.) The Scheduler product registers an > catalog-aware Event class so user's can define scheduled events. The product > keeps track of all Events in a ZCatalog "Schedule". Now, Schedule is a > persistent object and has a class definition, but the one and only instance > is created by the product and load time, if an instance doesn't already > exist. The Schedule has some special usage requirements: > > 1. There should be only one instance. That's why its class is not > registered. Hmm, I guess I don't see the necessity of making it a Singleton here. Suppose you need to segregate events into separate priority classes, or guarantee that, when executed, the run with the permissions of different users? Splitting up the schedule _might_ not be a terrible thing to do. Your default case could then just require dropping a single instance of the Schedule class at the root of your Zope hierarchy, and leaving it there. > > 2. It probably shouldn't show up on users' navigation bars and folder lists. > This probably is not a problem, because Schedule has a unique meta-type. But > that's not a watertight solution. A standard method for marking it invisible > would be better. If Schedule derives from ZCatalog, as it seems, and the Event class uses the well-known schedule ID as its default_catalog_id, then it isn't even necessary to "contain" the events within the schedule object -- they will find it anywhere above them in the tree by acquisition (think "uncle Schedule" instead of "papa Schedule"). > > 3. If and when it does show up (as on the manage_main menu) it should be > identified with the product (to avoid the "Whaz dis?" confusion). That's why > I want it to have an icon that shows it is part Scheduler product. Solved if Schedule is an "ordinary" ZClass. > > 4. No one, not even a manager, should be able to delete it accidently. You > can make an object undeletable by putting its ID in the list of reserved > names, but I have found, during development of Scheduler, that this hack > causes more problems than it's worth. I might settle for letting be deleted > by a manager. Again, solved for "ordinary" ZClass instances -- just set the permissions so. > > 5. When the product is deleted (I mean really deleted, because you don't > want to use it anymore), the Schedule should be deleted too. Failing this, > it should at least be deletable (an iffy situation, if you use the > reserved_names hack). On the other hand, if you are just updating the > product code, you probably don't want to delete the Schedule object. It may > contain scheduled events. This is complicated by the fact that when you load > a product, Zope first deletes the old product. So a manage_beforeDelete > method can't distinguish between a "real" delete and a code update. I've > also discovered that any error in a product's manage_beforeDelete method > makes the product not only undeletable, but (because of the implicit delete) > unupdatable (un-update-able)! > > (Hmmm. There's an idea. You could make any object, including the Schedule, > undeletable by giving it a manage_beforeDelete method that raises an error.) > > 6. The Schedule need to have a "well known" ID (I think). This is for use in > the default_catalog property of the events. I wouldn't want someone to > change the ID of the Schedule arbitrarily. This may be the same problem as > accidental deletion. You can override the setId() method to prefent changing the id; BasicUserFolder does this:: def _setId(self, id): if id != self.id: raise Globals.MessageDialog( title='Invalid Id', message='Cannot change the id of a UserFolder', action ='./manage_main',) > > Anyway, I thought I'd mention this use case, so that changes to the Zope > product API at least don't make implementation of such products any harder > than they already are, and perhaps make them easier. > > Got any suggestions for the short or long term? Sounds like an interesting project! Tres. -- ========================================================= Tres Seaver tseaver(a)palladion.com 713-523-6582 Palladion Software http://www.palladion.com

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manage_exportObject
by Daniel G. Rusch 23 Feb '00

23 Feb '00

All Does anyone know how to export an object (Folder or such) from outside of the Folder that contains the item to be exported without hard coding the path. In otherwords I would like to be able to have a user interface which would allow a person, with an export role, to be able to enter a list of fully qualified Items to be exported. Consider: FolderA FolderB ItemToExport I can export ItemToExport from FolderA by calling: <dtml-with "FolderA.FolderB"> <dtml-call "manage_exportObject(id='ItemToExport')"> </dtml-with> but I don't want the FolderA.FolderB to be hard coded. I would like it to be a var that I pass into the method. Something like: <dtml-with FullPath> what should the syntax be. Thanks, Dan P.S. since the id in the manage_exportObject argument list is a string, I can handle making that a var instead of hardcoding the value: ItemToBeExport.

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external method problems
by auto44082＠hushmail.com 23 Feb '00

23 Feb '00

This is probably really simple to those of you who have been doing this for a while, but I'm just starting and need some help. I'm creating a zope product consisting of a ZClass which inherrits the DTML Document and the Object Manager. (The Idea is it will be allowed to contain other objects) I've got an external method defined and that part seems to work OK. (I've done the standard hello world test, etc.) Where I'm getting hung up, is I'm trying to upload an external file to this new object, by calling the objects manage_addFile method followed by the manage_upload method. The idea is to create an empty file within my new object, then replace it's contents with the uploaded file, which was specified in a browse field when the object was created. I'm calling the external method that does this from the add constructor of my object. Everything seems to work fine, no errors etc. However, when I try and access the contents of the supposedly uploaded file from within my new object, say in a <dtml-var> tag. I get object not found errors. Unfortunately I'm not experianced enough at this yet for my problem to be immediately obvious to me. If one of you out there feels inclined to explain to me how this shoudl work I would greatly appreciate it. For your reference, here's the python code of my external method such as it is. Thanks a million! def getFile(self, REQUEST): """A simple external method.""" f1=REQUEST.new_file self.manage_addFile('temp',f1) self.temp.manage_upload([REQUEST.new_file,REQUEST]) IMPORTANT NOTICE: If you are not using HushMail, this message could have been read easily by the many people who have access to your open personal email messages. Get your FREE, totally secure email address at http://www.hushmail.com.

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Zope Weekly News
by Mike Pelletier 23 Feb '00

23 Feb '00

G'day, Zope Weekly News is a digest of some of the useful and interesting events which have occurred on the various Zope mailing lists and the Zope.org site. It is published each Wednesday evening. Any opinions contained in the Zope Weekly News are those of the chronicler exclusively. Announcements * Neuberger & Hughes have announced the release of version 1.0 of their WorldPilot software. It has been whispered in shady corners of conferences that WorldPilot could well be Zope's first Killer App. WorldPilot is an integrated, through-the-web PIM and IMAP mail client, with collaborative capabilities. http://lists.zope.org/pipermail/zope-announce/2000-February/000117.html New Products * Software Product: "Simple Directory of URLs", submitted by "Roug" This handy product manages sets of links to external resources. It can perform click-through counting, and allows untrusted users to submit link suggestions (which are subject to review). http://www.zope.org/Members/Roug/SimpleURLs * Software Product: "An Extensible, Base Banner System", submitted by "Bill" "Bill" wrote, "BannerSystem is the beginning of a full-fledged banner add management system. Currently, it is functional, and includes a sample implementation that can be used." http://www.zope.org/Members/Bill/Products/BannerSystem * Software Product: "JSplitter", submitted by "brianh" This is a replacement for ZCatalog's word-splitter. This product enables full-text searching of Japanese with ZCatalog. http://www.zope.org/Members/brianh/JSplitter * Software Product: "A simple site mapping object", submitted by "haqa" This ZClass product provides three forms of navigation widgets: "Top Level" (horizontal), "Full Context" (vertical) and a full Site Map. It requires "lalo"'s Renderable ZClass product. (See links) http://www.zope.org/Members/haqa/ZSiteMap http://www.zope.org/Members/lalo/Renderable-ZClass * Software Product: "A simple photo album product", submitted by "haqa" A simple ZClass product which provides a means of organising and browsing collections of images. They can be browsed as thumbnails in user-configured batch sizes. http://www.zope.org/Members/haqa/ZPhotoAlbum Updates * Software Product: "MySQL user folder", submitted by "vladap" Version 0.4.0 has been released. This release adds a layer of indirection to the DTML interface files the user folder uses to allow for multilingualism. Also, anonymous authentication now works. http://www.zope.org/Members/vladap/mysqlUserFolder * Software Product: "An Interface for MySQL", submitted by "adustman" This Products description states, "MySQLdb is a Python interface to MySQL-3.22. It is designed to be fully thread-safe and will not block other threads." A patch is included which will update ZMySQLDA to use this interface, rather than it's older, non-thread-safe version. The latest release is 0.1.2. http://www.zope.org/Members/adustman/MySQLdb Zope.org items * How-To: "Using Zope on a third-party web host", submitted by "gldnspud" This How-To explains how to set up Zope to run on a Unix server where you do not have administrative rights, such as on an ISP's server. http://www.zope.org/Members/gldnspud/zope3rdparty * How-To: "Use Direct Traversal of SQL Methods", submitted by Chris McDonough 'Direct Traversal' is a trick which allows you to create URLs which pass arguments to SQL Methods _without_ a query string on the end of the URL. This allows more aesthetically pleasing, "Mom-friendly" URLs. The audience for this How-To appears to be Zope newbies and intermediates with some SQL experience. http://www.zope.org/Members/mcdonc/HowTos/direct_traversal -- Mike Pelletier.

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sequence-key usage
by Jim Sanford 23 Feb '00

23 Feb '00

Does anyone know how sequence-key should/can be used within a dtml-in construct? Jim Sanford snafford(a)bellsouth.net

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Re: [Zope] Calculations - more dumb questions.
by Tres Seaver 23 Feb '00

23 Feb '00

Richard Moon <richard(a)dcs.co.uk> writes: > > I was reading earlier postings about 'variables' or the lack of them in > Zope and I went off and investigated Python Methods and External Methods > and I've got them working ... but .. I can't figure out how to use them to > solve my problem ... > > I have an SQL method and I've generated the form and results report using > the standard wizard - absolutely wonderful. > > Let's say I have an input variable, called 'customer' on the form which is > passed to the SQL method. BUT I want to intercept that variable and do > something with it, let's keep it simple and say that I want to put the > string "CT" in front of what the user enters (I know that's trivial but for > the sake of argument). > > I can write an External Method or Python Method which does the necessary > but it returns the string back to the calling object as text which is > displayed by the browser. > > Can anyone tell me how to get that new string back into the variable > 'customer'. > > Please :-) Ok, say your form is in a DTML Method called "gather_criteria". Make its ACTION attribute point to another DTML Method, "prepare_query". Inside prepare_query, munge the value of customer and call the SQL method, 'query_db':: <dtml-call "REQUEST.set( 'customer', 'CT' + customer )"> <dtml-in query_db>  </dtml-in> If the munging is more complicated, then write a Python method, "munge_customer_id", which takes the user-supplied value returns the munged value:: return "%08d" % _.int( customer ) # pad with leading zeroes to 8 digits Then call the munge_customer_id inside prepare_query:: <dtml-call "REQUEST.set( 'customer', munge_customer_id( customer ) )"> HTH, Tres. -- ========================================================= Tres Seaver tseaver(a)palladion.com 713-523-6582 Palladion Software http://www.palladion.com

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Re: [Zope] Zope hanging on a dereference???
by Tres Seaver 23 Feb '00

23 Feb '00

Michiel Toneman <toneman(a)phil.uu.nl> asks: > > This came up on the list some time ago, but this > solution gets Zope (2.1.4) in an infinite loop. > > -------------------------------------------------------------- > <dtml-in "objectIds()"> > <dtml-let refID=sequence-item>  > <dtml-with "_[ refID ]">  > <dtml-var id>  > </dtml-with> > </dtml-let> > </dtml-in> > -------------------------------------------------------------- > > Any ideas? Um, why go there? I mean, I don't know what is bothering Zope, but there are easier ways to get what you want::  <dtml-in "objectValues()"> <a href="&dtml-absolute_url;"> <dtml-var id> </a> </dtml-in> or, if you really just want the ids:: <dtml-in "objectIds()"> <dtml-var sequence-item> </dtml-var> -- ========================================================= Tres Seaver tseaver(a)palladion.com 713-523-6582 Palladion Software http://www.palladion.com

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Re: [Zope] Scalability
by Tres Seaver 23 Feb '00

23 Feb '00

Lucas Vogel <lvogel(a)exponent.com> asked: > > Where can I read the documentation on zope's scalability? I really love > Zope, and I want to see how far it can go... > > (sorry for being vague, I've spent all night planning a website to use zope > for) The topic has come up rather frequently on the list. The best strategy to get the overview you are looking for is to download the list archives (http://lists.zope.org/pipermail/zope and http://lists.zope.org/pipermail/zope-dev; look for the "Gzip'd Text" links) and browse them with grep or some such. -- ========================================================= Tres Seaver tseaver(a)palladion.com 713-523-6582 Palladion Software http://www.palladion.com

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