November 1999 - Zope-Dev

RE: [Zope-dev] manage_addDTMLMethod/Document taking contents as a rgument?
by Brian Lloyd 09 Nov '99

09 Nov '99

> Is there any reason why manage_addDTMLMethod/Document doesn't > accept the > new contents as anything other than a file object? > > Is something like the following acceptable? > > - def addDTMLDocument(self, id, title='', file='', > REQUEST=None, submit=None): > + def addDTMLDocument(self, id, title='', file='', data=None, > REQUEST=None, > + > submit=None): > """Add a DTML Document object with the contents of file. If > 'file' is empty, default document text is used. > """ > if type(file) is not type(''): file=file.read() > - if not file: file=default_dd_html > + if not file: > + if data is not None: > + file=data > + else: > + file=default_dd_html > ob=DTMLDocument(file, __name__=id) > ... Actually, file may be either a file object *or* a string - you should just be able to do: self.addDTMLDocument('MyDoc', title='MyTitle', file='my data...') Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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@#$%^&*( Zope Concurrency
by gtk 09 Nov '99

09 Nov '99

Bait: I am willing to SPEND MONEY to get this bastard solved. Summary of the situation so far: - Zope cannot deal with overlapping modifications to one object - That includes adding children to containers - The retry mechanism doesn't work - The user sees extremely messy errors - This seriously limits Zope's usability for write-intensive tasks like conferencing - Since all of my plans are for write-intensive tasks, that makes me uncomfortable I've spent my last 24 hours of work on Zope trying to figure out where to hack in any kind of method-aware queueing which could -- at its most simple -- simply not attempt to place more than one call to an object at once. From there, I'd be able to hack the routine for more subtlety. So far, no go. I'm just chasing my tail all around Publish, mapply and a few others, getting nowhere particularly fast. Well, I'm sick of whacking in calls to traceback.print_stack(), guys. I'd much rather get someone who knows what they're talking about to point out "oh, there's half a system in blah.py which needs 30 minutes of work to do what you need, and yeah we know retry is fundamentally broken". Or whatever. So, here goes bribery: If you're Australian and first to point out where I need to apply code, I'll buy you lunch next time I'm in your home city. If you're outside Australia, I'll have Amazon ship a copy of Slaughtermatic to your doorstep. Just someone, please, for fuck's sake, help me solve this concurrency problem before I'm forced to abandon the ZODB and/or Zope entirely. Regards, Garth. -- <gtk(a)well.com>

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Strange behavior in modifying properties
by Rik Hoekstra 09 Nov '99

09 Nov '99

Today I was experimenting a little with inserting and deleting from lines properties (though I see no reason why this would not apply to other properties. There was some strange behavior with modifying lists from dtml. The method was as follows: <dtml-var lst> <dtml-call "lst.remove(REQUEST['remove_item'])"> <dtml-var lst> where lst is a property of the containing folder. The proper way to do this would be to make a local copy of the list and replacing the property with it, but that's not the point. Now, as far as I'm aware this method should have no effect on the properties of the folder, or is it. But is has: it changes the property and it seems to have a permanent effect. But, as it is not a completed transaction changes are undone if ZServer is closed down. A few questions: - has anyone seen this as well - could someone explain me how this works - is this a bug or a feature - if it is a feature - could someone show me its use Rik Hoekstra

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ZCatalog search, index
by sergey2b 09 Nov '99

09 Nov '99

Kind day. How indexing and to search in objects File using ZCatalog? The object File contains txt the document. As Zope 2.1. in ZCatalog to receive the list of all words in an index. Sergey.

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Re: [Zope-dev] Returning lists of Tuples from External Methods
by Jeff Rush 09 Nov '99

09 Nov '99

On Mon, 08 Nov 1999 18:01:41 -0500, Phillip J. Eby wrote: >At 02:48 PM 11/8/99 -0800, David S. Harrison wrote: >> >>But if I return >>a two element tuple, I get a list of the second element of the tuple >>when I use <dtml-in>. I suspect Zope is doing something like >>interpreting the tuple list as name/value pairs and adding them >>to the namespace. But I haven't found any documentation on it. >>Any clues on what is happening here? > >When iterating over a sequence of two-item tuples, <dtml-in> puts the first >item into "sequence-key" and the second into "sequence-item". It is indeed >treating the sequence as a .items() style list. So *that's* whats happening! Drove me crazy trying to get it to work here, and I finally came up with workaround that used sequence-index to subscript into the original sequence. Would that behavior be considered a bug? I kept looking for an option to dtml-in to tell it "hands off" my sequence and don't get smart with it. <dtml-with "_(results = ZopeFind(PARENTS[1], search_sub=1, REQUEST=REQUEST))"> <dtml-in results> <dtml-if "REQUEST.script != ''"> <dtml-let item="results[_['sequence-index']]"  abs_path="_.string.split((URL2+'/'+item[0]), REQUEST.script)[1][1:]">     <dtml-var abs_path> <BR> <dtml-if "not item[1].meta_type in excludables"> <dtml-call "catalog_object(item[1], abs_path)"> <dtml-call "REQUEST.set('itemcount', itemcount+1)"> </dtml-if> </dtml-let> </dtml-if> </dtml-in> </dtml-with> -Jeff Rush

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Re: [Zope-dev] manage_addDTMLMethod/Document taking contents as argument?
by Anthony Baxter 09 Nov '99

09 Nov '99

>>> "Jonothan Farr" wrote > You shouldn't need to modify the source to pass in a string as the document > data. You just pass in a string as the file argument. I use this in the local > file system product. I think you can also pass in a 'file-like' object that > has read() and readline() methods although I haven't tried this. blah. smack me for not being able to read. my excuse is that I'm very tired. Anthony

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manage_addDTMLMethod/Document taking contents as argument?
by Anthony Baxter 09 Nov '99

09 Nov '99

Is there any reason why manage_addDTMLMethod/Document doesn't accept the new contents as anything other than a file object? Is something like the following acceptable? - def addDTMLDocument(self, id, title='', file='', REQUEST=None, submit=None): + def addDTMLDocument(self, id, title='', file='', data=None, REQUEST=None, + submit=None): """Add a DTML Document object with the contents of file. If 'file' is empty, default document text is used. """ if type(file) is not type(''): file=file.read() - if not file: file=default_dd_html + if not file: + if data is not None: + file=data + else: + file=default_dd_html ob=DTMLDocument(file, __name__=id) ob.title=title id=self._setObject(id, ob) if REQUEST is not None: try: u=self.DestinationURL() except: u=REQUEST['URL1'] if submit==" Add and Edit ": u="%s/%s" % (u,quote(id)) REQUEST.RESPONSE.redirect(u+'/manage_main') return ''

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Calling Python method from subclassed ZClass DTML method ?
by Brad Clements 08 Nov '99

08 Nov '99

I've created a simple Custom Python Class as described in the ZClass Tutorial, but I can't seem to call a python class method from a DHTML method in my derived ZClass. My Python module gets registered correctly. I went to Control Panel/ Products and saw my Package listed "Mercury". Under Mercury, I chose to create a new ZClass called Stats, which is subclassed from ModuleFactory, a class I registered in my Package's __init__.py Zope\Lib\Python\products\Mercury\__init__.py has import MercuryJobs import MercuryStats def initialize(context): """Called by Zope to initialize a product""" context.registerBaseClass(MercuryJobs.QueueManager) context.registerBaseClass(MercuryStats.ModuleFactory) ---- In the Zclass 'stat's, I added a new DTML method called getModules, and that method has: <dtml-var ModuleList> When I choose to view it, I get KeyError, ModuleList. Perhaps this can't be viewed until instantiated? Am I on the right track? MercuryStats.ModuleFactory returns a list of objects which I'll want to iterate over with #in. I'm expecting to add a "Mercury/Stats" object into a folder at some point, then #in on it to get the list of objects. Is this the correct way to call a method in a python base class from a DHTML method in Zclass? Brad Clements, bkc(a)murkworks.com (315)268-1000 http://www.murkworks.com (315)268-9812 Fax netmeeting: ils://ils.murkworks.com ICQ: 14856937

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Returning lists of Tuples from External Methods
by David S. Harrison 08 Nov '99

08 Nov '99

Something special seems to happen if I return a list of two-element tuples from an external method. If I return a list of three-element tuples, Zope does what I expect. It allows me to sequence through each tuple in the list using <dtml-in> and then I use <dtml-var "_['sequence-item'][0]"> <dtml-var "_['sequence-item'][1]"> and <dtml-var "_['sequence-item'][2]"> to access elements of the tuple. But if I return a two element tuple, I get a list of the second element of the tuple when I use <dtml-in>. I suspect Zope is doing something like interpreting the tuple list as name/value pairs and adding them to the namespace. But I haven't found any documentation on it. Any clues on what is happening here? David S. Harrison (dsh(a)magma-da.com)

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Re: [Zope-dev] RE: [Zope] xmlrpc calls require string results?
by Jeff Rush 08 Nov '99

08 Nov '99

On Mon, 8 Nov 1999 09:47:52 +1100, gtk wrote: >That's already in my next draft of the Boring Product How-To, but just for >the record: why are doc strings enforced? Are they used for anything yet? Doc strings have been used by ZPublisher since the early days, as a way of authorizing whether a function is publically visible or not, just as the leading underscore in a name does. Why we need two ways? I guess there were existing functions w/o the underscore and they needed an access control mechanism. The doc strings are not -used- for anything re Zope and although I like the control it gives you, I've been bitten by omitted doc strings too. I'd just like a development-time option that makes ZPublisher complain into a logfile, so I can realize the error of my ways. Hmm, not a very satisfying answer... maybe DC will give a better one. -Jeff Rush

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