December 1999 - Zope-Dev

Re: [Zope-dev] Two Puzzling Questions.
by Anthony Baxter 21 Dec '99

21 Dec '99

>>> "Clayton Miller" wrote > First Question: > I am attempting to use the dtml tree tag to show the folders under > a different folder branch from the one I am currently on. For example, > /site1/subfolder1 is where the application is running but I wish to > display all of the subfolders in /site2/folderA. My code looks like > this: > dtml-with folderA > dtml-tree branches_expr="objectValues(['Folders'])" > dtml-var title_or_id {NOTE: I actually make a HTML HREF here} > /dtml-tree > /dtml-with > > After playing around with this code a little while (by replacing the > branches_expr with a branches=objectValues, I realized that I am still > using the /site1/subfolder1 as my point of reference for the tree tag (i.e. > the root directory). So, finally my question is why am I not seeing the > subfolders under /site2/folderA? I am using Zope 2.1.1. try <dtml-tree folderA> <dtml-var title_or_id> </dtml-tree> > Second Question: > I am using two frames (Menu and Main). In my "Main" frame, I have a submit > button that I wish to display the results in the "Menu" frame. Since I have > multiple submit buttons, I am calling a decision dtml method that examines > the submit value and decides which dtml method to display. So, my question > is using dtml, how do I specify a particular frame? My current resulting > dtml method shows up in the "Main" frame where the button was pressed. My > decision dtml method looks something like: Use the 'target' attribute in your initial <form> tag. Or else in your main page, put some javascript to change the location of the other frame. The former is going to be easier. :) Anthony

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Two Puzzling Questions.
by Clayton Miller 21 Dec '99

21 Dec '99

First Question: I am attempting to use the dtml tree tag to show the folders under a different folder branch from the one I am currently on. For example, /site1/subfolder1 is where the application is running but I wish to display all of the subfolders in /site2/folderA. My code looks like this: dtml-with folderA dtml-tree branches_expr="objectValues(['Folders'])" dtml-var title_or_id {NOTE: I actually make a HTML HREF here} /dtml-tree /dtml-with After playing around with this code a little while (by replacing the branches_expr with a branches=objectValues, I realized that I am still using the /site1/subfolder1 as my point of reference for the tree tag (i.e. the root directory). So, finally my question is why am I not seeing the subfolders under /site2/folderA? I am using Zope 2.1.1. Second Question: I am using two frames (Menu and Main). In my "Main" frame, I have a submit button that I wish to display the results in the "Menu" frame. Since I have multiple submit buttons, I am calling a decision dtml method that examines the submit value and decides which dtml method to display. So, my question is using dtml, how do I specify a particular frame? My current resulting dtml method shows up in the "Main" frame where the button was pressed. My decision dtml method looks something like: dtml-if "submit == 'valueA'" dtml-var "dtmlmethod-1" dtml-elif "submit == 'valueB'" dtml-var "dtmlmethod-2" etc. As always, your help is very appreciated!! Thanks, Clayton. ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

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RE: [Zope-dev] Re: Subpath traversal interface (was RE: ANN: Pyth on Methods 0.1.7 up and over to DC) and over to DC)
by Michel Pelletier 21 Dec '99

21 Dec '99

> -----Original Message----- > From: Evan Simpson [mailto:evan@4-am.com] > Sent: Tuesday, December 14, 1999 7:21 PM > To: Michel Pelletier > Cc: 'Phillip J. Eby'; zope-dev(a)zope.org > Subject: Re: [Zope-dev] Re: Subpath traversal interface (was RE: ANN: > Python Methods 0.1.7 up and over to DC) and over to DC) > This was one of those windows that i minimized and found five days later. ;) > Ah. You make a special kind of folder to be a site > container, where I do a > drop-in on an existing container. Different design > philosophies. There > aren't yet (AFAIK) any non-Folder Folderish objects in common > use, but if > one arises it will be possible to make it a SiteRoot. On the > other hand, > absolute_url is a pain for me. I, personally, prefer the folderish approach. If a site root is a definitive folder, then 'portal' like methods can be placed in it, giving the virtual host a more OO feel, but that's just a design issue. Jim has gotten into the habit of drawing little ships portals (to concentric circles with bolts around it) when talking about a portal. He and I both assumed the folder arch when we thunk up Zope's virtualhost support. The beauty of our solution, I think, is the size of the change, absolute URL was actually simplified, one short method was added to REQUEST, and a very simple folder object was created that overrides absolute_url and __bobo_traverse__. All in all, suprisingly little code. But really the whole guts of the operation is done in the REQUEST.setBase() and absolute_url() methods. If you object impliments that interface, it doesn't really matter if it's folderish or not. I think the issue is mostly the hook. > No, the path foolery I'm talking about is the > addition/alteration of path > elements in the traversal path while traversal is taking place. For > example, if 'http://www.site.com/' should resolve to > '/site/', an Access > Rule in the root can add the 'site' element to the (initially > empty) path. > Also, I have a shopping cart system where > '.../catalog/cart=2345/...' is > converted to '.../catalog/...' and 'cart=2345' saved in the > REQUEST by an > Access Rule in 'catalog'. That's pretty nifty. I believe we want that, what we need to figure out is the best way to do manipulations like that. You're using a Rule object now, probably makes sense at the application level to not change that and have identical Rule objects in interface, but investigate how it's to be done. If there is a discrete folder object like we have now, is the before hook needed at Rule time? > > How would you like the behavior to change? > > Well, __before_traverse__ isn't a method. It's a dictionary > whose keys are > application-defined, and whose values are the names of > attributes of the > container. These attributes are presumed to be callables, and will be > called with the container and request, in the same order as > their keys' > sort order. This means that an application can safely add > and remove hooks > without affecting other applications' hooks, and can control > invocation > order. Either contained objects or methods of the container > can be pointed > at, without causing any reference loops. If the target is deleted or > renamed, it will be silently removed from the dictionary on the next > traversal attempt. What I think your hitting on here Evan is the beginnings of an Event model. Zope cannot ignore these issues for long, especially with workflow concepts becoming decernable in the mist. > Can you usefully nest SiteObjects? I have a site where shop.foo.com's > target lives in a folder inside of www.foo.com's target. Untested, but I guess yes. If the base URL doesn't match the SERVER_URL, no rewriting is done and the object looks just like a folder. -Michel > > Thanks, > > Evan @ 4-am >

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Why is TemplateDict so opaque? -and- Have you seen this problem?
by Dave Parker 20 Dec '99

20 Dec '99

[sorry folks, I'm tired, so this is halfway to a rant :-( ] I'm trying to do a work-around for the "namespace goes away after two levels of dtml method calls" problem with an XXXPythonMethod, and have now hit another wall as regards accessing the namespace enclosing the XXXPythonMethod. So I'm sitting here trying to figure out where this variable of mine is hidden, and I'm thinking I should be able to get there via the _ instance of TemplateDict. Well.... I'm not happy that I now know what TemplateDict is - I really wish I hadn't had to go there, but now that I'm there I have a much better understanding of why it is impossible to get information out of it; it has "do you have this key" and "get the value of this key" and absolutely nothing else. Is there a reason for this? I can think of *countless* times when the ability to just have a *glimpse* of my namespace would have saved hours. Is there a possibility that you could make the thing look more like a mapping object, with keys() and values() and items() and such? It'd sure save a ton of time. Some kind of tag to pretty-print the namespace would be great too. ... But then, actually, not having to deal with the namespace going away problem would have saved even more time. I'll describe it briefly to see if it rings any bells: Imagine a dtml method called methodA that looks like this:  Depth: <dtml-var "methodA(counter=counter+1)">  and you call it from a browser as methodA?counter:int=0 You'd expect one of these: a) zope locks up/crashes because of the recursion b) methodA bails out because someone detects recursion or exceeds a stack limit of some sort What you *get*, however, is the very suprising: Error type: KeyError Error value: standard_html_header And if you rip out the reference to standard_html_..., you'll get the equally baffling: Error type: NameError Error value: methodA In practice, you'll find that this disappearing act occurs at about the third level of expression evaluation. Ring any bells? It requires *horrible* workarounds when you run into it. Ok, thanks for putting up with this. Dave Parker Sr. Software Engineer GlobalCrossing

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How about load/unload for ZODB residents?
by LD Landis 20 Dec '99

20 Dec '99

Hi, Maybe I'm dense... but it seems to me that it would be relatively straight forward to allow for an unload routine that is able to create a directory/file structure into which the source is 'unloaded' similar to (what I think I recall exists) the load from a directory routine. I've had problems (need to reconfirm) moving (via export/ import) stuff from one environment to another. Does this type of functionality already exist? (Sorry, been so busy that I haven't read everything that passes through this list). TIA! -ldl

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RE: [Zope-dev] Python Methods commited
by Michel Pelletier 20 Dec '99

20 Dec '99

> -----Original Message----- > From: Evan Simpson [mailto:evan@4-am.com] > Sent: Saturday, December 18, 1999 11:20 AM > To: Phillip J. Eby > Cc: Christopher Petrilli; zope-dev(a)zope.org > Subject: Re: [Zope-dev] Python Methods commited > > > "Phillip J. Eby" wrote: > > > Now that PythonMethods are in the Zope CVS, I may take a > whack this weekend > > at adding another option to them, if other people don't > find it offensive > > (and perhaps even if they do... ;) ). ASP syntax. That is: > > > > <% if foo>1: %> > > The value of foo is <%= foo %>. > > <% else: %> > > Foo isn't worth much. > > <% end if %> > > > > I already have a robust ASP->Python translator I've had in > production use > > for years, so incorporating it into PythonMethods should be > just a matter > > of adding a syntax option, and a call to the translator at > just the right > > moment. The translator makes up for the infamous ASP > whitespace problem by > > implementing block end syntax (end if, end for, end while, > end def, etc.). > > Sounds more like you might want to subclass PythonMethod to > make a new ASP > Method class (and perhaps ASP Document?). Depending on what > your syntax > allows, you might even want to work with DTML instead. Then > again, there's > always this mysterious new multi-syntax thing DC has been > teasing us with ;-) Format, actually. I haven't taken into consideration the use case that the managed content can be a script, I'm not sure if I want to go into that realm, just yet. What I'm working on can be scripted at both the parsing end and the rendering end though, I suppose it could be done. -Michel > > Cheers, > > Evan @ 4-am > > > _______________________________________________ > Zope-Dev maillist - Zope-Dev(a)zope.org > http://lists.zope.org/mailman/listinfo/zope-dev > ** No cross posts or HTML encoding! ** > (Related lists - > http://lists.zope.org/mailman/listinfo/zope-announce > http://lists.zope.org/mailman/listinfo/zope ) >

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(no subject)
by John Fohrman 20 Dec '99

20 Dec '99

Hi All -- Is there a limit to how large an HTTP POST can be in Zope? It appears to be cutting off at approx. 2048 characters. If there is a maximum size, is there a way of increasing it? Best wishes, John ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

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ZCatalog 'url' bug??
by David Kankiewicz 18 Dec '99

18 Dec '99

OK try this (well don't unless you want undeletable objects) create something that is CatalogAware, than have it index itself "index_object" (when being created, inside a factory I think?), now clear your catalog and use "Find Items to ZCatalog" to index the same object. Lastly try to delete the object, Zope complains can't uncatalog the object and it won't delete it. The uid or rid or data_record_id_ (can somebody make up their "minds"?) is first indexed WITHOUT the leading '/' and than with it if we "Find Items ..." Would: url='%s/%s' % (self.DestinationURL(), self.id) not return a leading '/'? If so, would url='/%s/%s' % (self.DestinationURL(), self.id) fix it? Else could somebody add a test to see if 'uri' has a '/' in the front and ignore the problem... relevant CatalogAwareness.py: def url(self, ftype=urllib.splittype, fhost=urllib.splithost): """Return a SCRIPT_NAME-based url for an object.""" if hasattr(self, 'DestinationURL') and \ callable(self.DestinationURL): url='%s/%s' % (self.DestinationURL(), self.id) else: url=self.absolute_url() type, uri=ftype(url) host, uri=fhost(uri) script_name=self.REQUEST['SCRIPT_NAME'] __traceback_info__=(`uri`, `script_name`) if script_name: uri=filter(None, string.split(uri, script_name))[0] uri=uri or '/' if uri[0]=='/': uri=uri[1:] return uri def index_object(self): """A common method to allow Findables to index themselves.""" if hasattr(self, self.default_catalog): getattr(self, self.default_catalog).catalog_object(self, self.url()) Maybe relevant FactoryDispatcher.py class FactoryDispatcher(Acquisition.Implicit): " " def __init__(self, product, dest, REQUEST=None): if hasattr(product,'aq_base'): product=product.aq_base self._product=product self._d=dest if REQUEST is not None: v=REQUEST['URL'] v=v[:rfind(v,'/')] self._u=v[:rfind(v,'/')] def DestinationURL(self): "Return the URL for the destination for factory output" return self._u

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Python Methods commited
by Christopher Petrilli 18 Dec '99

18 Dec '99

Gang, I've committed in Evan Simpson's Python Methods into the core distribution, however there are a few changes, some minor, some major: * All pieces of the unsafe version have been removed, this is non-negotiable. * document_src has been protected by a new permission * Line endings have been fixed on a lot of stuff to be UNIX having said that, there are two issues I'd like to discuss: * Object traversal, and traversal_subpath * Access to things like the formatters via "magic namespace" Chris -- | Christopher Petrilli Python Powered Digital Creations, Inc. | petrilli(a)digicool.com http://www.digicool.com

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Zope-Mozilla mailinglist created
by Martijn Pieters 18 Dec '99

18 Dec '99

Hello Zopatistas, To accompany the Zope Mozilla Initiative, we have created a mailinglist on the subject. At zope-mozilla(a)zope.org, you can follow and join the discussion on the new additions to the Zope "Internet architecture". To subscribe, follow the instructions on the mailinglist webpage: http://lists.zope.org/mailman/listinfo/zope-mozilla More information about the initiative: http://www.zope.org/Resources/Mozilla If you can think of a Use Case for RDF in Zope, post these to the new list. My request for use cases: http://lists.zope.org/pipermail/zope-mozilla/1999-December/000001.html -- Best regards, Martijn Pieters mailto:mj@digicool.com

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