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Re: [Zope] Year of the Zope Book
by Dieter Maurer 15 Mar '01

15 Mar '01

Martijn Pieters writes: > > Could it be this: > > URL:http://www.dieter.handshake.de/pyprojects/zope/book/chap3.html > > > > I've read the first 3 chapters and it looks like his book is going be based > > on building one big app. > > No, Diter is writing for Wrox. See Chapter 1. I have not yet decided for whom I write... Dieter

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Python packages (was: RE: [Zope] FTDraw)
by Dieter Maurer 15 Mar '01

15 Mar '01

Paz writes: > Thanks for the tip Dieter, but indeed, the __init__.py is there. > > However, you say that the _init_ is necessary. Is this more of a zope thing? It is being a Python thing: Python before 1.5 only knew "modules". Then, following Java, packages have been invented (to prevent pollution and conflicts in namespace, modules are found in). A package is essentially a (file system) folder that contains modules and other packages (subpackages). You use it in forms like this: import package.subpackage.module or from package.subpackage import module Details in Python's package support document. The problem with this: legacy * of course, modules have been organized before in folders. How to distinquish such folders from packages? Guido descided, that the existence of "__init__.py" does this. If it is there, the folder is a package; otherwise, it is just a folder containing modules. * "*.pth" files They have been invented to make modules organized in folders easily accessible be Zope. Some magic (defined in "site.py") looks for "*.pth" files and extends PYTHONPATH by what it finds there. PYTHONPATH is used to locate modules (and now packages). Through the PYTHONPATH extension, modules could be found even if they have been in subfolders. Using packages and "*.pth" files together can lead to serious problems (although, I do not expect this in your case): It confuses Python's module loader. Normally, it prevents the same module to be loaded twice. But under this confusion, it may load the same module several times under different names. Some modules hate to be loaded twice... Your code snipped "import PIL.XXXX" with the error message "could not find 'XXXX'" suggests, that "PIL" is used as a package and that is has been found but "XXXX" was not found. I cannot remember the precise name, but I think, your "XXXX" should be defined there. Apparently, the PIL found is strange, not what/how it should be. Usually, I would analyse such problems be starting the Python interpreter interactively (without Zope). Under Unix (I always work under Unix, can't help much with Windows): export PYTHONHOME=<Your Zope Distribution Directory> <Your Python used by Zope, usually "bin/python"> import PIL PIL.__path__ PIL.__file__ If "PIL.__path__" raises an exception, your "PIL" is not a package. "PIL.__file__" tells you, where the module/package has been found. If you put PIL inside the "Products" folder (in fact a package), then the above "import" would look like: from Products import PIL Dieter

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where zope should be installed
by jacintha menezes 15 Mar '01

15 Mar '01

Hi, Let me kindly know whether we have to install Zope at the root directory of the Linex machine. B'coz When we tried to install zope at the directory 'root/home/pgmtool' Zope got installed but when the ./start was run it gave the error as 'z2.py permission denied'. what may be the problem ?. Do we need to install zope at the root directory only ?. Please throw some light. Thanks, jacintha

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Re: [Zope] problem with Zope and IE and ReportLab
by Dieter Maurer 15 Mar '01

15 Mar '01

Jerome Alet writes: > <dtml-call "RESPONSE.setHeader('Content-Type', 'application/pdf')"> > <dtml-call "RESPONSE.setHeader('Content-Disposition', 'attachment; filename=rapport.pdf')"> > <dtml-var rpdf> Code like this may add spurious white space. Use <dtml-return rpdf> instead of <dtml-var rpdf> Dieter

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FTDraw
by Paz 15 Mar '01

15 Mar '01

oops. I keep forgetting Reply All -----Original Message----- From: Paz [mailto:paz@chello.nl] Sent: Thursday, March 15, 2001 7:26 AM To: Dieter Maurer Subject: RE: [Zope] FTDraw Thanks for the tip Dieter, but indeed, the __init__.py is there. However, you say that the _init_ is necessary. Is this more of a zope thing? It says in the PIL docs for the latest, that the PIL.pth is the all-important package identifier. I tried moving it around, also with no avail. What gets me confused is when PIL in in the products area, the message is: (when PIL is in /Products/PIL) Cannot import Products.TextImage yadda yadda.. No module named PIL.Image (when PIL is in /bin/PIL) Cannot import Products.TextImage yadda yadda.. No module named Image Is it me or is the compiler decreeing that it finds it but its being stubborn? Pil is being a pill... Paz (now ignoring PIL and checking into TextImage and FTDraw stuff to see if its updated or something) -----Original Message----- From: Dieter Maurer [mailto:dieter@handshake.de] Sent: Wednesday, March 14, 2001 9:00 PM To: Paz Cc: Zope Subject: Re: [Zope] FTDraw Paz writes: > ERROR: Cannot find PIL.Image module > > > Grrr.... Fine... At least the error message is different... Progress by Old > Bell's standard. Lets check it out.. Um.... > /lib/python/Products/PIL/Image.py.... Duh... can the compiler read or has > the third bottle of wine FUBAR'd me? Can you verify, that "PIL" contains a "__init__.py" file. Some broken unpackers remove empty files. But "__init__.py" is essential, even if empty. Dieter

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bobo_mod_time difference in zcat vs object
by Joel Burton 15 Mar '01

15 Mar '01

First of all, apologies for the dozen questions over the past week. Zope's learning curve gets very steep as one takes the first steps through the API, and the many responses here have been very helpful. I have a series of books that are JBook ZClass objects. They (naturally) have a bobobase_modification_time of when the instance was last modified. I have a catalog, BookCatalog, that holds the JBooks. The default index for bobo_mod_time is and default metadata for it are there. If I clear the catalog, re-find JBooks and look in the catalog values, I can see that a particular book has a bobo_mod_time of today. But: when I iterate over the query results, I see a bobo_mod_time of yesterday. For example: <dtml-in "Catalog.searchResults(meta_type=['JBook'])" sort=bobobase_modification_time reverse> <dtml-var title> from_obj: <dtml-var "getObject().bobobase_modification_time()"> from_cat: <dtml-var bobobase_modification_time> </dtml-in> returns different values for my book from_obj (today) and from_cat (yesterday), even though when I looked in the cat, I see today for bobo_mod_time. What I'd like is the bobo_mod_time of today, since that's when I actually changed the object! I've cleared and re-found my objects, and this doesn't fix the problem. I am not using RAM cache or any other (intentional) caching objects. Any ideas? Thanks! -- Joel Burton <jburton(a)scw.org> Director of Information Systems, Support Center of Washington

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Catalogs
by Kam Nejad 15 Mar '01

15 Mar '01

Does anybody know how to delete the references to items in a catalog since deleting alone does not seem to accomplish this. When a search is done I don't want any references to that object. thanks

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Working of multiple user on a document in a Zope Database
by Stefan Winandy 15 Mar '01

15 Mar '01

Hi! Problem: Dokuments are archived in a Zope System. How can you inhibit that multiple user make some changes on the same document? Has anybody an answer? br stefan

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Re: [Zope] How to test for a user having a permission?
by Dieter Maurer 15 Mar '01

15 Mar '01

=?iso-8859-1?q?Hamish=20Lawson?= writes: > I know I can map methods to permissions and so have the Zope machinery > take care of testing whether the user has permission to call a method, > but say I want to decide whether to display an 'Edit' button on the > page depending on whether the user has the appropriate permission for > editing. How do I test for the user having this permission - is there > some kind of hasPermission() method I can use? I could make an > assumption about which roles have which permissions and call hasRole(), > but that doesn't seem right to me* - I don't think my code should care > about what roles the user has, only whether they have the required > permission. Look in the embedded Online Help system -> API reference -> User Dieter

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asyncore.poll
by Randall F. Kern 14 Mar '01

14 Mar '01

Recently my development site has started getting _really_ slow a few times a day. Stopping and restarting Zope makes it quick again. When it's in this slow state, I open a python interpreter and run Zope.debug() to get profile information. This profile shows a huge amount of time being spent in asyncore.poll() (like 25 seconds on a 25.2 second request). I'm running ZEO and Zope 2.3.1b1 on Linux. Any ideas? Thanks, -Randy

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