May 2001 - Zope-Dev - Zope lists

bug in ZEO-1.0b3
by Dyon Balding 29 May '01

29 May '01

If the ZEO server goes down, the the client no longer tries to keep reconnecting. This appears to be something to do with the __closed attribute in zrpc.py. Is there a page to check the status of bugs in ZEO? When is the next version due out? and will it be a final 1.0 version? thanks -d

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Re: [Zope-dev] What would *you* like to have in PropertyManager and friends?
by Chris Withers 29 May '01

29 May '01

> On Mon, May 28, 2001 at 09:37:21AM +0100, Chris Withers wrote: > > > > Well, a nicer interface for changing them is about all I think they need. > > And sort the marshalling stuff out. It would be nice to actually store blank > > dates and numbers (None should be a valid value for both of them ;-) > > That's about all I can see that it needs (probably forgotten something > > though :-S) > > Blank dates&numbers are important, I don' t know how they could > escape us. :-) > As for nicer interface... I guess you' ll have to elaborate a > bit ;-) Well, I think it's manage_changeProperties (nasty name for starters) that deletes any property you don't include in its arguments, see the interfaces wiki for details. How about just replacing it with: def modifyProperties(**kw) ...where kw is a dictionary mapping property name to property value. If it property specified in kw didn't exist, it would be created. Also, on addProperty and modifyProperties, how about making type coersion happen and raise an exception if it fails? so, if you did addProperty('test','string',1.234), addProperty would coerse 1.234 into the string '1.234' or raise an UncoercableException if it couldn't? Might be nice if the available property types were also documented somewhere. Hmm, also, coersion should check that when something is stored as the 'lines' property type, it only accepts a list of strings. cheers, Chris > []s, > |alo > +---- > -- > I say a prayer now our love's departed > That you'll come back to stay > Bring back the perfect day > > http://www.laranja.org/ mailto:lalo@laranja.org > pgp key: http://www.laranja.org/pessoal/pgp > > Brazil of Darkness (RPG) --- http://www.BroDar.org/ > >

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Announcing ZPatterns & TransWarp list and CVS
by Ty Sarna 29 May '01

29 May '01

I'm pleased to announce that I've finished the last task in setting up a bunch of new services for ZPatterns and TransWarp users: writing this announcement. :-) First, we now have mailing lists: TransWarp(a)eby-sarna.com and ZPatterns(a)eby-sarna.com. To subscribe, visit: http://www.eby-sarna.com/mailman/listinfo Second, we've made our CVS repository more accessible. Major packages of interest are ZPatterns, PlugIns, and LoginManager under the ZProducts directory, and TW (TransWarp) under the pylib directory. There's other stuff there as well, but most of it is currently in flux and lacking documentation, and you should ask before deciding to base any code on it. You may browse the cvs tree with ViewCVS at: http://cvs.eby-sarna.com/ Or access it via anoncvs using the CVSROOT: :pserver:anoncvs@anoncvs.eby-sarna.com:/cvsroot You will need to login with the password "anoncvs" before you will be able to access file. Sample session: For sh-type shells: $ export CVSROOT=:pserver:anoncvs@anoncvs.eby-sarna.com:/cvsroot For csh-type shells: $ setenv CVSROOT :pserver:anoncvs@anoncvs.eby-sarna.com:/cvsroot Now, log in: $ cvs login (Logging in to anoncvs(a)anoncvs.eby-sarna.com) CVS password: anoncvs Now you can "cvs co ZProducts/ZPatterns", or whatever. There is an additional mailing list, source-changes(a)eby-sarna.com, that carries cvs commit messages.

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dtml-in bug?
by cs＠comlounge.net 28 May '01

28 May '01

Hi! Dunno if it's again my "strange" setup, but I have some problem with dtml-in or maybe I simply didn't get something right.. Well, I used the following dtml code: <html> <dtml-in expr="[1,2,3,4,5,6]" size="4"> a<br> </dtml-in> </html> and I thought I will get three a's as output.. instead I get 6.. If I do size=3 it's ok (3 output), if I do size=4 or 5 or 6 I get them all.. (actually it happened with some more complex list of Result objects but this seems to do the same here) Can someone explain that to me..? (it's Zope 2.3.2, Python 1.5.2, SuSE Linux 7.0) cheers, Christian -- COM.lounge http://comlounge.net/ communication & design info(a)comlounge.net

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Xron running under linux
by Homan Els 28 May '01

28 May '01

Hi Nick, The point is that linux has a different thread system then other platforms. Under standard UNIX (hpux, sgi, etc.), you have the possibility to create a thread. When creating one or more threads, you will have: 1 process with one or more threads sharing the same environment (such as uid, etc.). In this case, when changing a env. var. this will be available in both threads. But, when creating a thread in linux you will have: for each thread one process (you can see this with ps -ef|grep python). In this case, when changing a env.var. this will give a problem, because the other thread still have the old uid. Zope is starting as root. Zope initializes its products (create a thread) as root, and then changes to user "nobody" (or to user <....>given by -u .... (in the startup). So, the thread does have another uid, and this is giving the problem! I just change my: rczope: su wwwrun -c "$zope_start 2>/dev/null" because in my start script, I call: exec /usr/local/zope/bin/python $PYTHONHOME/z2.py -u wwwrun -a 127.0.0.1 "$@" You might need to chown the files in your zope directory. I did try to run the Xron product and everything is working correctly now. Enjoy it !. Els Nicholas Lo wrote: > Hi Els, > > Sorry for I couldnt give you the code in time. BTW, what are your tricks in > making Xron working under Linux??? If Xron works under Linux, I can throw > away my old code and follow the Xron way. > > -- Nick > > ----- Original Message ----- > From: "Homan Els" <homan(a)embl-grenoble.fr> > To: "Nicholas Lo" <nicklo(a)siliconcreation.com> > Sent: Monday, May 28, 2001 6:47 PM > Subject: [Fwd: [Zope-dev] Xron on linux: Dispatcher thread stops after a > while] > > > Hi Nicholas, > > > > It is working ! > > (I will now try to test to correctness of the product). > > > > See email from Xron on linux. > > > > Regards, > > > > Els > > > > > >

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Xron on linux: Dispatcher thread stops after a while
by Homan Els 28 May '01

28 May '01

ZOPE 2.2.2 , Xron -0-0-9, Python 1.5.2 Hi Steve, I am running Zope under linux (Suse 6.4). And I would like to use Xron. But, I can not get it running. I did read your email : Xron on linux. And therefore I would like to know, how you did manage to use Xron. I have the general Xron problem, that the zope-server is not responding anymore after the installation of Xron. Thanks, Els Homan

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Simple ZClass Stuff
by Eric Roby 27 May '01

27 May '01

I have been on this Zope journey since late February. Most times Zope has been like an artichoke, thorny on the outside but improves dramatically as you peel off the layers and can get to the meat. Other times (very few to date) Zope is like an onion, the more layers you peel off the more tears you have to deal with. Well this is one of those onion-times. I have been exploring the processes involved in creating Zope products via ZClasses. I have read all the primers/How-To's, latest version of the Zope Book. I have been successful in creating a Renderable:Renderable-ZCatalog:CatalogAware structured-text document class. However, I am unable to create a simple ZCatalog:CatalogAware-OFS:DTMLDocument class. I have tried many different incantations, sacrificed my first born but to no avail. I have even tried to just select OFS:DTMLDocument as my subclass. Regardless how I slice it, I consistently get: Error Type: TypeError Error Value: unsliceable object The Traceback is as follows: ***Sorry, these guys still evade my comprehension*** Traceback (innermost last): File F:\WebSite\lib\python\ZPublisher\Publish.py, line 223, in publish_module File F:\WebSite\lib\python\ZPublisher\Publish.py, line 187, in publish File F:\WebSite\lib\python\Zope\__init__.py, line 221, in zpublisher_exception_hook (Object: RoleManager) File F:\WebSite\lib\python\ZPublisher\Publish.py, line 171, in publish File F:\WebSite\lib\python\ZPublisher\mapply.py, line 160, in mapply (Object: htmlDocumentClass_add) File F:\WebSite\lib\python\ZPublisher\Publish.py, line 112, in call_object (Object: htmlDocumentClass_add) File F:\WebSite\lib\python\OFS\DTMLMethod.py, line 189, in __call__ (Object: htmlDocumentClass_add) File F:\WebSite\lib\python\DocumentTemplate\DT_String.py, line 549, in __call__ (Object: htmlDocumentClass_add) File F:\WebSite\lib\python\DocumentTemplate\DT_With.py, line 133, in render (Object: htmlDocumentClass.createInObjectManager(REQUEST['id'], REQUEST)) File F:\WebSite\lib\python\DocumentTemplate\DT_Util.py, line 334, in eval (Object: htmlDocumentClass.createInObjectManager(REQUEST['id'], REQUEST)) (Info: REQUEST) File <string>, line 0, in ? File F:\WebSite\lib\python\ZClasses\ZClass.py, line 543, in createInObjectManager (Object: htmlDocumentClass) File F:\WebSite\lib\python\OFS\ObjectManager.py, line 265, in _getOb (Object: Traversable) TypeError: (see above) NOTE: On one attempt, I modified the constructor input form to use 'addDTMLDocument' and the class method to use 'manage_edit' and 'manage_upload'. These changes got past the 'unsliceable object' error, however, when instantiating this class, I was unable to access the property sheets and views that I had defined. I was left with the default views defined for the DTML Document class. The Zope Book says I can create a new class using OFS:DTMLDocument as my base class, generate my property sheets, hook my property sheets to views and be on my way. If anyone can enlighten me here I would be much in you debt. Obviously, I am missing a key point. Eric

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Randomness (RE: [Zope-dev] CoreSessionTracking 0.8)
by Bjorn Stabell 26 May '01

26 May '01

Allright, let me try again. I wish I had a small piece of code to give you so you can reproduce it, but right now you'd have to get our entire CMF-based website. The bug basically manifests itself in that there are two versions of the variable we put in the session (a shopping cart dict). When I browse through the site (not even updating the shopping cart) it'll show one version for some links (1-40) before it switches to show the other, and so on. It looks like the website has two shopping carts that it switches back and forth between. You can see the shopping cart on every page in the website (it's embedded into the template). We were using frames, but I tried it several times without frames now and the bug remains. I even noticed that other variables disappeared randomly as well, e.g., USER_PREF_LANGUAGES which is set by the Localizer, resulting in a key error (I've probably seen 300 pages views, and then suddenly one going back to another page gives a key error?). I'm very curious what could possibly be causing such problems. I thought there might be something wrong in the shared memory between threads, as I can't see anything else changing but the threads (is there a way to display which thread is doing the publishing?). I've seen similar randomness displayed in other situations where I've been reloading pages that would sometimes (same interval, about every 1-40 times) show one character set, and other times another. I think nobody likes to see that kind of randomness. It gives me a very bad stomach feeling. I definately think it's something deeper than a CoreSessionTracking problem. Bye, -- Bjorn Stabell <bjorn(a)exoweb.net> -----Original Message----- From: Chris McDonough [mailto:chrism@digicool.com] Sent: Wednesday, May 23, 2001 20:34 To: Howard Zhang Cc: chrisme(a)digicool.com; zope-dev(a)zope.org; Exoweb Subject: Re: [Zope-dev] CoreSessionTracking 0.8 I remember this problem, but I haven't been able to reproduce it. But maybe it's because I'm not understanding the steps to reproduce it. The sentence "user adds coke to shopping cart and click link to add coke again before request finished" is hard to understand. Can you explain? Are you using frames? Howard Zhang wrote: > > Hi > The problem about CoreSessionTracking we describe before we can > repeat again now. > The step is: > ( 1 ) User adds Burger to shopping cart > ( 2 ) User adds coke to shopping cart and click link to add coke > again before request finished > ( 3 ) The Burger is disappear in shopping cart and just one coke > ( not two ) > ( 4 ) Repeat the step 2,Burger is back > > Anything you could tell me would be helpful. > > Regards, > > howard > > _______________________________________________ > 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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RE: Randomness (RE: [Zope-dev] CoreSessionTracking 0.8)
by Bjorn Stabell 25 May '01

25 May '01

Nope, couldn't have been, because: I couldn't set _p_changed from Python Script, but I changed the last line setting the shopping_cart object in the session to: session.set('shopping_cart', cart.copy()) This should create a fresh copy of the dict, which should be sufficent notice for the persistence machinery (or isn't a shallow copy enough? cart is a dict of integers). I also removed the call to cart_recalculate, just to make sure there were no spooky thing going on there. I'm still seeing the bug. Just a quick question. In: session.set('shopping_cart', cart) is cart call-by-reference or call by value (cart is a dict). I guess it depends if 'set' makes a copy of the dict or not before assignment? Also, do I really have to make a copy, or is there a way from Python Script to notify the persistence machinery about a change in a complex object, e.g., dict? Bye, -- Bjorn -----Original Message----- From: Matt Hamilton [mailto:matth@netsight.co.uk] Posted At: Saturday, May 26, 2001 00:37 Posted To: Zope Developer Conversation: Randomness (RE: [Zope-dev] CoreSessionTracking 0.8) Subject: RE: Randomness (RE: [Zope-dev] CoreSessionTracking 0.8) On Fri, 25 May 2001, Bjorn Stabell wrote: > session = context.session_mgr.getSessionData() > > cart = session.get('shopping_cart', {}) > > sku = int(sku) > > if not cart.has_key(sku): > cart[sku] = 0 > > if int(qty)>0: > cart[sku] = cart[sku] + int(qty) Could this be the same problem that I was experiencing, in that dicts/btrees do not in themselves notify the persitence machinery that they have changed? try adding cart._p_changed = 1 to the code after modifying cart{}. -Matt -- Matt Hamilton matth(a)netsight.co. uk Netsight Internet Solutions, Ltd. Business Vision on the Internet http://www.netsight.co.uk +44 (0)117 9090901 Web Hosting | Web Design | Domain Names | Co-location | DB Integration _______________________________________________ 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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RE: Randomness (RE: [Zope-dev] CoreSessionTracking 0.8)
by Bjorn Stabell 25 May '01

25 May '01

Chris McDonough: [...] > weeping (although grateful for the exchange), I'm sorry Chris. We didn't give you a very good debugging chase. I know how frustrating bug reports like "Help! It doesn't work" is, but I guess it's very hard to troubleshoot bugs in frameworks since there's so much customized code in there. To be a little bit more helpful I've included two functions: cart_add(sku, qty) (Python Script) This function adds qty amount of a skus (integer id for product items) to the cart cart_display (DTML Method) This method displayes the cart The bug appears even when these two functions are the only functions interacting with the session and the shopping. There are obviously some references to code not provided in there, so don't expect them to work just like that. If you can't see anything wrong from a simple code inspection, I volounteer to provide the whole site for you. It's quite refreshing to do a project for a sandwich shop, like we do now, but I hope we can get to the bottom of these disappearing cokes. :) Thank you for all the help. Open source sure beats the heck out of commercial solutions when it comes to support. Bye, -- Bjorn Stabell <bjorn(a)exoweb.net> cart_add(sku, qty) _______________ session = context.session_mgr.getSessionData() cart = session.get('shopping_cart', {}) sku = int(sku) if not cart.has_key(sku): cart[sku] = 0 if int(qty)>0: cart[sku] = cart[sku] + int(qty) session.set('shopping_cart', cart) container.cart_recalculate() context.REQUEST.RESPONSE.redirect(context.REQUEST['HTTP_REFERER']) cart_show() _______________ <dtml-call "REQUEST.set('totalprice',0)"> <dtml-comment> Session token key, value: <dtml-var "session_mgr.getTokenKey()">, <dtml-var "session_mgr.getToken()"><br> </dtml-comment> <dtml-let cart="session_mgr.getSessionData().get('shopping_cart', {})"> <dtml-if "cart.keys()"> <dtml-in "cart.keys()" sort> <dtml-if sequence-start> <table border="0" cellspacing="0" cellpadding="0" width="100%"> <tr> <td bgcolor="#FFDAAB"> <form action="cart_change" method="post"> <table width="100%" border="0" cellspacing="1" cellpadding="2" align="center"> <tr> <td colspan="2" bgcolor="#006633" class="pagetitle"><dtml-var "gettext('Order Bag')"></td> </tr> <tr> <td><dtml-var "gettext('Category')"></td> <td align="right" width="20%"><dtml-var "gettext('Qty')"></td> </tr> </dtml-if sequence-start> <dtml-let shop_item="get_shop_item(_['sequence-item'])"> <tr valign="top"> <td bgcolor="#FFFFFF">  <dtml-var "shop_item.Title()"> <a href="cart_rm?sku=&dtml-sequence-item;"><dtml-var "gettext('remove')"></a> <dtml-comment>  <a href="cart_rm?sku=&dtml-sequence-item;">remove</a> <!--dtml-var "shop_item.price"> </dtml-comment> <dtml-let qty="_.int(cart[_['sequence-item']])"> <dtml-call "REQUEST.set('totalprice', totalprice + shop_item.price * qty)"> </td> <td nowrap bgcolor="#FFFFFF"><input type="hidden" name="skus:list" value="&dtml-sequence-item;"> <input type="text" name="sku_&dtml-sequence-item;:int" value="<dtml-var "cart[_['sequence-item']]">" size="1"> </td> </dtml-let> </dtml-let> </tr> <dtml-if sequence-end> <tr valign="top"> <td colspan="2" align="right" class="RMB" bgcolor="#FFFFCC"><dtml-var "gettext('TOTAL')"> <dtml-var "_.int(session_mgr.getSessionData().get('shopping_cart_amount', 0))"> </td> </tr> <tr valign="top"> <td colspan="2" bgcolor="#FFFFFF"> <b><dtml-var "gettext('Bonus points')"></b> <br> <dtml-var "gettext('This order is worth')"> <dtml-var "_.int(session_mgr.getSessionData().get('shopping_cart_bonus', 0))"> <br> <dtml-unless "portal_membership.isAnonymousUser()"> <dtml-var "gettext('Bonus points to spend')"> <dtml-var "_.int(member.bonus_points)"> </dtml-unless> </td> </tr> <tr valign="top"> <td colspan="2" bgcolor="#FFFFFF"> <input type="submit" name="Submit" value="<dtml-var "gettext('update')">"> <a href="orderForm"><dtml-var "gettext('Checkout')"></a> </td> </tr> </table> </td> </tr> </table></dtml-if sequence-end> <dtml-else> Empty </dtml-in> </form> </dtml-if> </dtml-let>

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