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Re: [Zope] Initialization of properties in a ZClass instance?
by Kevin Dangoor 14 Sep '99

14 Sep '99

-----Original Message----- From: Darran Edmundson <Darran.Edmundson(a)anu.edu.au> To: zope(a)zope.org <zope(a)zope.org> Date: Tuesday, September 14, 1999 4:59 AM Subject: [Zope] Initialization of properties in a ZClass instance? >The problem is that >/Products/NewsItemProduct/NewsItemClass/propertysheets/common/NewsItemPrope rties >will not allow me to add a "date" property of type date and >leave it blank. Ideally, I would like this property to >default (ie. automatically initialize) to the current datetime. >How does one achieve this? (My guess is that I give it a >dummy value in the class definition and then set it in the >constructor method?). Your guess is exactly what I do. >This raises the question: does every object instance have >a creation datetime even though it doesn't explicitly appear >on the Properties tab, and if so, is this value available >in a DTML method. This has been talked about earlier on the list. I believe the answer from the DC guys was that the object creation time is not stored in the ZODB (only the last modification time). >On an unrelated note, how can I make each instance of NewsItem's >index_html method autmatically visible in the Contents tab and >available for editing? If index_html is a method of the ZClass, it cannot be overridden at the instance level. My method for doing this is to create a DTML method in the ZClass called "default_index_html". Then, the constructor copies the contents of this to a new DTML method inside the instance (that one is called just "index_html"). For convenience sake, I also made a tab for restoring the defaults... This is stuff in the KM|Net News package http://www.zope.org:18200/Members/tazzzzz/kmnn Kevin

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Error compiling ZMySQLDA with Zope 2.0
by ben andrew fulton 14 Sep '99

14 Sep '99

Hi. I know the ZMySQLDA doesn't fully support parts of Zope 2.0, but I haven't seen anything claiming that I can't compile it with the new version. Below is what I get after unpacking the DA to the Zope lib directory and following the directions for the first make instruction. Any ideas what I need to change on the commandline or in the script to make this work? ionix:/usr/local/dc/Zope-2.0.0/lib/python/Products/ZMySQLDA/src# make -f Makefile.pre.in boot PYTHON=/usr/bin/python1.5 rm -f *.o *~ rm -f *.a tags TAGS config.c Makefile.pre python sedscript rm -f *.so *.sl so_locations VERSION=`/usr/bin/python1.5 -c "import sys; print sys.version[:3]"`; \ installdir=`/usr/bin/python1.5 -c "import sys; print sys.prefix"`; \ exec_installdir=`/usr/bin/python1.5 -c "import sys; print sys.exec_prefix"`; \ make -f ./Makefile.pre.in VPATH=. srcdir=. \ VERSION=$VERSION \ installdir=$installdir \ exec_installdir=$exec_installdir \ Makefile make[1]: Entering directory `/usr/local/dc/Zope-2.0.0/lib/python/Products/ZMySQLDA/src' make[1]: *** No rule to make target `/usr/lib/python1.5/config/Makefile', needed by `sedscript'. Stop. make[1]: Leaving directory `/usr/local/dc/Zope-2.0.0/lib/python/Products/ZMySQLDA/src' make: *** [boot] Error 2 Thanks, -->ben

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checking for existing/nonexisting properties and objects?
by Darran Edmundson 14 Sep '99

14 Sep '99

Consider the following dtml code fragment: <dtml-in "objectValues(['Image'])"> <img src="<dtml-var id>"> <dtml-if "caption"> <caption><dtml-var caption></caption> </dtml-if> </dtml-in> I use it to loop over all images in a folder, displaying the image and its caption if such a property exists. This snippet fails if the image doesn't have a "caption" property. I've been working around this by adding an empty caption further up the tree but I'd like to avoid this if possible. On a related note, I have tried to write dtml to render an image only if the named object exists without success. Any help would be much appreciated, preferably cc'd to my private email as I receive the digest version of the list. Cheers, Darran. -- Darran Edmundson [Darran.Edmundson(a)anu.edu.au]

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RE: [Zope] Unique incrementing IDs
by Terrel Shumway 14 Sep '99

14 Sep '99

Thank you, Kevin, for your idea. I wanted to do the same thing, and your idea worked wonderfully because of the transaction stuff that Mike explained. I noticed, however, that using REQUEST.set, then passing REQUEST to manage_changeProperties has a very nasty side effect: All of the properties of the object may be changed, not just newid. For example, if REQUEST happens to contain {"title": "new title"}, then your folder gets its title changed. This is what I ended up doing: folder id="repository" property next_id = 1 property id_template = "doc-%06d" dtml-method "get_new_id" = <dtml-let id=next_id> <dtml-call "manage_changeProperties({'next_id': id + 1})"> <dtml-return "id_template % id"> </dtml-let> Then I just call get_new_id whenever I want to get a unique id for a new item in the repository folder. -----Original Message----- From: Michel Pelletier [mailto:michel@digicool.com] Sent: Saturday, September 11, 1999 10:09 AM To: Kevin Dangoor Cc: zope(a)zope.org Subject: Re: [Zope] Unique incrementing IDs Kevin Dangoor wrote: > > Hi, > > Since Zope is multithreaded, it seems like there could be a problem > doing something like this: > > <dtml-comment newid is a folder property> > <dtml-call "REQUEST.set('newid', newid + 1)"> > <dtml-call "manage_changeProperties(REQUEST)"> > <dtml-call "REQUEST.set('id', newid)"> > <dtml-with "manage_addProduct['SomeProduct']"> > <dtml-call "ZClass_add(_.None, _)"> > </dtml-with> > > It seems plausible that you might end up trying to create two objects with > the same ID. This will obviously fail, but it would be nice if there was an > easy way to get the next ID sequentially like this. Am I correct in assuming > that there may be a condition where it tries to create two objects with the > same ID? Yes. This would cause the database to raise a 'ConflictError'. If this happes, one thread wins and one thread looses. The looser's transaction is completely aborted, and the loosers request is resubmitted in a whole new transaction. This works well to avoid the problem your thinking about. -Michel

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Re: [Zope] newbie question
by Susan Harris 14 Sep '99

14 Sep '99

You need to set the permissions on the <zopedir>/var directory so that the user nobody has write access to it. HTH Phil phil(a)philh.org ----- Original Message ----- From: CURTIS David <David.Curtis(a)state.or.us> To: IPM Return requested (Receipt notification requested) <zope(a)zope.org> Sent: Tuesday, September 14, 1999 9:22 PM Subject: [Zope] newbie question > Fiends of Zope, > > After installing the source code for Zope 2.0. I try to run the start sript ./Zope/start and I get the error /var/Z2.py permission denied! This file does not exist in this directory. What is rwrong? > > _______________________________________________ > Zope maillist - Zope(a)zope.org > http://www.zope.org/mailman/listinfo/zope > > (To receive general Zope announcements, see: > http://www.zope.org/mailman/listinfo/zope-announce > > For developer-specific issues, zope-dev(a)zope.org - > http://www.zope.org/mailman/listinfo/zope-dev ) >

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Missing DTML tags?
by Scott Anderson 14 Sep '99

14 Sep '99

Idea, not a question, this time... ;-) Are there, or should there be, DTML tags/methods that ease the insertion of things like input boxes, selection lists, submit buttons, and the like? Something along the lines of the XML DOM for HTML, but easier to use... :-) I've got a basic one for Java; would this be a useful thing to port to Python/ZOPE? Regards, -scott anderson

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Re: [Zope] does Win ZServer need TCP/IP?
by tommy b 14 Sep '99

14 Sep '99

On Tue, 14 Sep 1999 22:21:18 +0200, Tino Wildenhain wrote: > tommy b wrote: > > Is TCP/IP needed to use ZServer for only "local" hosting? Is there another > > meathod (i.e. Java script) that a local host server can access zope pages? > > nope. Oh well, I was hopping to find something that will render Zope pages without having to open TCP/IP sockets, etc... > > I was trying to avoid loading TCP/IP on my computer that I'll write & test > > my zope web sites for security reasons. I'll use NetBUI to transfer the > > files to my host after testing them out. > > thanks for any help! > > No you cant test a webserver (Zserver as an example) without TCP/IP. > Since HTTP uses TCP uses IP for transfer of data. > See rfc2616 (http://www.w3.org/Protocols/rfc2616/rfc2616-sec6.html ) > If you want security, NetBUI is much more insecure as TCP/IP for > itself :) > My advice: install TCP/IP, disable any services you dont need, including > NetBUI over TCP/IP and Microsoft Printer/Datasharing and use ftp > to move files around (better: use Zope and HTTP to move subtrees or the > whole Zope-documenttree around) Well, (not to get too off subject), I was going to use the NetBUI-for-file-sharing-only trick (both computers are on the same network), but I may use Linux on the web host. thanks Tino! ________________________________________________________________ Get FREE voicemail, fax and email at http://voicemail.excite.com Talk online at http://voicechat.excite.com

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newbie question
by CURTIS David 14 Sep '99

14 Sep '99

Fiends of Zope, After installing the source code for Zope 2.0. I try to run the start sript ./Zope/start and I get the error /var/Z2.py permission denied! This file does not exist in this directory. What is rwrong?

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does Win ZServer need TCP/IP?
by tommy b 14 Sep '99

14 Sep '99

Hello Is TCP/IP needed to use ZServer for only "local" hosting? Is there another meathod (i.e. Java script) that a local host server can access zope pages? I tried to run ZServer with from a fresh Zope 2.0.0 installation on my Win95 machine. After running the start.bat, I got the following output: --v ouput start F:\Util\ZopeTest>"F:\Util\ZopeTest\bin\python.exe" "F:\Util\ZopeTest\z2.py" -D Traceback (innermost last): File "F:\Util\ZopeTest\z2.py", line 394, in ? from ZServer import setNumberOfThreads File "F:\Util\ZopeTest\ZServer\__init__.py", line 123, in ? from HTTPServer import zhttp_server, zhttp_handler File "F:\Util\ZopeTest\ZServer\HTTPServer.py", line 116, in ? from HTTPResponse import make_response File "F:\Util\ZopeTest\ZServer\HTTPResponse.py", line 97, in ? from PubCore.ZEvent import Wakeup File "F:\Util\ZopeTest\ZServer\PubCore\ZEvent.py", line 91, in ? Wakeup=trigger().pull_trigger File "F:\Util\ZopeTest\ZServer\medusa\select_trigger.py", line 99, in __init_ a = socket.socket (socket.AF_INET, socket.SOCK_STREAM) File "F:\UTIL\ZOPETEST\BIN\lib\plat-win\socket.py", line 21, in socket return _socketobject(_realsocketcall(family, type, proto)) socket.error: (10047, 'winsock error') F:\Util\ZopeTest> ^-- output end I was trying to avoid loading TCP/IP on my computer that I'll write & test my zope web sites for security reasons. I'll use NetBUI to transfer the files to my host after testing them out. thanks for any help! tomB ________________________________________________________________ Get FREE voicemail, fax and email at http://voicemail.excite.com Talk online at http://voicechat.excite.com

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strange bug with mail&redirection
by Joerg Wittenberger 14 Sep '99

14 Sep '99

Hello folks, I've got a code snippet, which seems to reveal at least one bug: I have a dtml method, which receives a form input and either a) tries to transfers control to another method, if it's there or b) changes some properties and redirects to another form: <dtml-try> <dtml-var "_['t' + `status` + 'to' + `REQUEST.form['status']`]"> <dtml-except> <dtml-call "propertysheets.manage_changeProperties(REQUEST)"> <dtml-call "RESPONSE.redirect(URL1 + '/edit')"> </dtml-try> now I have another dtml method "t5to6", which sends some mail and shares the rest of the operation:  To: jerry@localhost From: Transition Subject: STATUS: <dtml-var title> <dtml-var number> 5 -> 6 Statusübergang  <dtml-call "propertysheets.manage_changeProperties(REQUEST)"> <dtml-call "RESPONSE.redirect(URL1 + '/edit')"> Problem I (less hard): Sometimes all I do is edit the "t5to6", after that I get the message "AttributeError" __call__. I can solve that by deleting and recreating the dtml method. Problem II (real part): The method sends mail at most one time, but most of the time I see an error "Invalid Header 0:" from DTMLMethod.py line 398. I don't get that error when I either don't redirect or don't send mail. (Using mailhost instead of smtphost won't help.) /Jerry -- You can have it done fast, you can have it done cheap, and you can have it done well. --- But you can only have two of those at once.

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