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RE: [Zope] Zope Myths?
by sean.upton＠uniontrib.com 12 Sep '02

12 Sep '02

I strongly considered this option at one time with a shared DAS/RAID between my primary and secondary ZSS. I never ended up doing this because of concerns. Out of curiosity, with shared storage over SCSI/SAN, do you have any thoughts on how to overcome the following issues? 1 - Data fencing (using SAN switches+integrated software, or STONITH devices, or something)?? 2 - Clean up a broken FileStorage? To what degree can this be successfully automated without manual intervention of a sysadmin? 3 - Deal with accidental damage to the storage done by the primary node, perhaps due to asynchronous writes to the file? It really seems like replication is really a less brittle option (though how much less brittle, I'm not sure). Though not committed at this point, for a big project I am working on, I am strongly considering use of DirectoryStorage and its snapshot capabilities for low-tech replication (via find+cpio+nfs) to try and minimize issues I might face similar to #2 and #3 if I had chosen FileStorage. Sean -----Original Message----- From: Bill Anderson [mailto:bill@libc.org] Sent: Wednesday, September 11, 2002 3:20 PM To: Paul Winkler Cc: zope(a)zope.org Subject: Re: [Zope] Zope Myths? On Wed, 2002-09-11 at 09:54, Paul Winkler wrote: > On Wed, Sep 11, 2002 at 03:01:14PM +0100, Paul Browning wrote: > > What have we understated/exaggerated/misunderstood? > > AFAIK, ZEO still does not allow you to distribute your ZODB. > There is still a single, central ZEO server with a single > ZODB. Actually, using shared storage, such as one may have on a SAN, or using a shared SCSI bus (I *strongly* recommend the FC-SAN route over the shared SCSI ;), and a fail over server setup, you can indeed provide fail-over ZODB services. Yes, I know fibre channel SANs are beyond the means of most on the list, but it is certainly possible. In fact, I know of a way to provide multi-site fail over using ZODB and SAN technology on Linux. In fact, if one had one of the IBM zSeries boxes ... mmm toys .... I've yet to try it out (looking for a new job takes too much time in this market), but I believe one could use this method and provide multiple read-only ZEO servers for the same DB. -- Bill Anderson Linux in Boise Club http://www.libc.org Amateurs built the Ark, professionals built the Titanic. Amateurs build Linux, professionals build Windows(tm). _______________________________________________ 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 )

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Adding mixin class does not work with Python 2.2/Zope 2.5.1
by Kevin Smith 12 Sep '02

12 Sep '02

I have a class that overrides the __bobo_traverse__ method to put parts of the URL into request variables. I'm not sure when it broke, but it isn't working in my Python 2.2/Zope 2.5.1 setup. A simple example that breaks is as follows: from OFS.Folder import Folder class TraversableObject: pass class TraversableFolder(TraversableObject, Folder): pass I get an error message about an empty or missing docstring even when putting an empty class in front of Folder in the superclass list. Does anyone know how to fix this? Kevin Smith Kevin.Smith(a)sas.com

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Changing External Python Methods
by Andreas Tille 12 Sep '02

12 Sep '02

Hello, I'm fiddling arround with some External Python Methods and I have to admit that it is a real pain to debug those Methods - at least I did not found a reasonable way. It makes me really crazy ist the fact that it seems that Zope just caches the first version of the file which I putted into the Extensions directory and later changes are simply ignored. For instance I just try to do some processing onto an image named bland.gif which is in the same folder of ZMI as the External Method. I've got a. Error Type: IOError Error Value: [Errno 2] No such file or directory: 'bland.gif' Well, besides the fact that I would like to know how to reference those files I really want to know why the following code stolen from http://www.zopelabs.com/cookbook/1010702887 works def MakeThumbHi2(self, image="test"): oriImage = self.restrictedTraverse(image) oriFile = cStringIO.StringIO(oriImage.data) image = PIL.Image.open(oriFile) image.thumbnail(100, 100) image_type = image.format thumbnailImage = cStringIO.StringIO() image.save(thumbnailImage, image_type) thumbnailImage.seek(0) return thumbnailImage.getvalue() and if I just replace my very own External Method by just this code snipped (please note: there is no string 'bland.gif' in it - it was just in my former broken code) I get the very same error message with the missing file 'bland.gif'. It seems that there is something cached and I would like to know how to get the changed version into this cache. Moreover it would be nice to enlighten me about some other way to reference files in the same ZMI folder from External Methods besides this way to ship a parameter. Kind regards Andreas.

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CoreSessionTrackung KeyError ?
by Dirk Datzert 12 Sep '02

12 Sep '02

Hi, I'm running Zope 2.3.3 with CoreSessionTracking 0.9. After working for hours in a Zope Session I got sometimes an KeyError. I don't know how many other users working on my zope at the same time, but this KeyError was reported from at least 1 other users. Has anybody a hint what to change ? Regards, Dirk ErrorType: KeyError ErrorText: 76225064A0dd9Ykfc-4 -------------------------------------------------------------------------------- Troubleshooting Suggestions This resource may be trying to reference a nonexistent object or variable 76225064A0dd9Ykfc-4. The URL may be incorrect. The parameters passed to this resource may be incorrect. A resource that this resource relies on may be encountering an error. For more detailed information about the error, please refer to the HTML source for this page. If the error persists please contact the site maintainer. Thank you for your patience. Traceback (innermost last): File /usr/share/zope/lib/python/ZPublisher/Publish.py, line 224, in publish_module File /usr/share/zope/lib/python/ZPublisher/Publish.py, line 187, in publish File /usr/share/zope/lib/python/Zope/__init__.py, line 227, in zpublisher_exception_hook (Object: ElementWithAttributes) File /usr/share/zope/lib/python/ZPublisher/Publish.py, line 171, in publish File /usr/share/zope/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: index_html) File /usr/share/zope/lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: index_html) File /usr/share/zope/lib/python/Products/EasyEditor/EasyEditable.py, line 372, in index_html (Object: ElementWithAttributes) File /usr/share/zope/lib/python/Products/EasyEditor/EasyTemplates/EasyViews.py, line 94, in __call__ (Object: default) File /usr/share/zope/lib/python/OFS/DTMLMethod.py, line 197, in __call__ (Object: default) File /usr/share/zope/lib/python/DocumentTemplate/DT_String.py, line 540, in __call__ (Object: default) File /usr/share/zope/lib/python/OFS/DTMLMethod.py, line 190, in __call__ (Object: pageheader) File /usr/share/zope/lib/python/DocumentTemplate/DT_String.py, line 540, in __call__ (Object: pageheader) File /usr/share/zope/lib/python/OFS/DTMLMethod.py, line 190, in __call__ (Object: init_session) File /usr/share/zope/lib/python/DocumentTemplate/DT_String.py, line 540, in __call__ (Object: init_session) File /usr/share/zope/lib/python/DocumentTemplate/DT_Util.py, line 339, in eval (Object: REQUEST.set('data',sessionDM.getSessionData())) (Info: REQUEST) File <string>, line 0, in ? File /usr/share/zope/lib/python/Products/CoreSessionTracking/SessionDataManager.py, line 264, in getSessionData (Object: sessionDM) File /usr/share/zope/lib/python/Products/CoreSessionTracking/SessionDataManager.py, line 375, in _createSessionDataObject (Object: sessionDM) File /usr/share/zope/lib/python/Products/CoreSessionTracking/SessionDataContainer.py, line 191, in set (Object: /sessionDM) File /usr/share/zope/lib/python/Products/CoreSessionTracking/SessionDataContainer.py, line 344, in __setitem__ (Object: /sessionDM) KeyError: (see above)

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IPython question with zope
by keo＠arisztid.mentha.hu 12 Sep '02

12 Sep '02

so ... my problem is .... i want to use the medusa monitor of zope ... with ipython .. ipython is cool it contains lots of useful stuff like tab completion for everything, dumping of objects, etc but the problem is ipython doesnt echo to my terminal the stuff what the monitor client echoes .. only when i press ctrl-c, it ouputs everything in a bunch like this: Output messages. Log by User File Execution: warning: unhandled connect event Python 2.1.3 (#1, Apr 15 2002, 11:13:45) [GCC 2.7.2.3] Copyright (c) 2001-2002 Python Software Foundation. All Rights Reserved. [...] this is actually an ipython problem, but perhaps someone knows the answer here. thanks a lot, k -------------------------------------------------------------------- mail2web - Check your email from the web at http://mail2web.com/ .

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RE: [Zope] Simple Comparison - How to find the Template you are in in a list of all files in a directory
by Passin,Thomas B. (Tom) 12 Sep '02

12 Sep '02

[Edward Pollard] > > On Thursday, September 12, 2002, at 11:39 AM, Passin,Thomas B. (Tom) > wrote: > > > [ Edward Pollard] > >> > >> Is this the incorrect way to compare strings? Is there a > better way > >> to do this? > >> > > > > if a==b: #do something > > > > I tried this. It did not work. My thoughts are that == would compare > the pointers to the objects, not the contents. > It works for ordinary Python sequences and strings: >>>a='this is a test' >>>b=''this is a test' >>>a==b >>>1 >>>b='xxx' >>>a==b >>>0 For other object, it depends on how the comparison has been coded in the class or type. > Code wise, I have this > <span tal:condition="python:items.title_or_id == > template.title_or_id" > tal:replace="Content I want">Filler</span> > > items being the list I'm iterating through. > > So the obvious (==) didn't work (apologies for not clarifying this in > the first place), the next-obvious (cmp) didn't work, what will? > You may have to use the string value for the comparison. Cheers, Tom P

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Accessing MS Exchange/Outlook through Zope
by McDonnell, Larry 12 Sep '02

12 Sep '02

Hi, Our corporate standard is to use MS Outlook as our email system (please keep the laughter down to a minimum). I was able to use the mailhost portion of Zope and can send email via our Internet provider. One of the project they are contemplating will require some type of emailing. They wish for the whole company to be on this through email. Is there a way to tie in our Exchange server so they can see everyone email address? Thanks. Larry McDonnell Proton Energy Systems 50 Inwood Rd. Rocky Hill, CT 06067 (860) 571-6533 ext. 531 Email:lmcdonnell@protonenergy.com www.protonenergy.com

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redirect request and the options property
by Borislav 12 Sep '02

12 Sep '02

I have a python script that redirects the browser to a ZPT like this: return context.REQUEST.RESPONSE.redirect(request.URL1 + '/myPage') I woluld like to pass an argument to the ZPT that will be accessible through the 'options' property like this: <p tal:condition="options/errorMessage | nothing" tal:content="options/errorMessage">Error message</p> Is there a way to use the RESPONSE object to set the 'options' property before the redirect? Is the 'options' property user-accessible (writable) at all? Another related issue: how can I redirect to a ZPT passing all form properties from the current request like in the following pattern: HTML Form page -> action script that redirects -> Form handling page Thanks in advance. --Borislav

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RE: [Zope] Simple Comparison - How to find the Template you are in in a list of all files in a directory
by Passin,Thomas B. (Tom) 12 Sep '02

12 Sep '02

[ Edward Pollard] > > I've been attempting to iterate through the list and then compare the > file ID of the item in the repeat loop with the file ID of > the template > using 'cmp'. I cannot get cmp to return 0 even when the names are the > same (as evaluated by displaying them in the template). > > Is this the incorrect way to compare strings? Is there a > better way to > do this? > if a==b: #do something Cheers, Tom P

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External Editor question
by eric.n.dunn＠bankofamerica.com 12 Sep '02

12 Sep '02

I was able to get External Editor working on a Solaris box and W2K Client. I used Python-2.2.1.exe, win32all-148.exe, and zopeedit-win32-0.5.exe on W2K client. I only had to add an editor path to the ZopeEdit.ini to get it to work on the client (Product already installed on ZServer) Works great with one (1) editor path but how do I get it to differentiate from a text editor (or html editor) and an image editor? Read your doc's and it should have worked because file types are already config'ed. # C:\ZopeExternalEditor\ZopeEdit.ini # Zope External Editor helper application configuration [general] # General configuration options # Uncomment and specify an editor value to override the editor # specified by the operating system # editor = "C:\Program Files\TextPad 4\TextPad.exe" # editor = "C:\Program Files\Adobe\Photoshop 7.0\Photoshop.exe" "%1" editor = "C:\Program Files\Macromedia\Dreamweaver UltraDev 4\UltraDev.exe" "%1" # Automatic save interval, in seconds. Set to zero for # no auto save (save to Zope only on exit). save_interval = 0 # Temporary file cleanup. Set to false for debugging or # to waste disk space. Note: setting this to false is a # security risk to the zope server cleanup_files = 1 # Use WebDAV locking to prevent concurrent editing by # different users. Disable for single user use or for # better performance use_locks = 1 # To suppress warnings about borrowing locks on objects # locked by you before you began editing you can # set this flag. This is useful for applications that # use server-side locking, like CMFStaging always_borrow_locks = 0 # Specific settings by content-type or meta-type. Specific # settings override general options above. Content-type settings # override meta-type settings for the same option. [meta-type:DTML Document] extension=.dtml [meta-type:DTML Method] extension=.dtml [meta-type:Script (Python)] extension=.py [meta-type:Page Template] extension=.pt [meta-type:Z SQL Method] extension=.sql [content-type:text/*] extension=.txt [content-type:text/html] extension=.html [content-type:text/xml] extension=.xml [content-type:image/gif] extension=.gif [content-type:image/jpeg] extension=.jpg [content-type:image/png] extension=.png

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