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how to preserv information
by Champier 15 Jan '02

15 Jan '02

Hi, I'm a new zope programmer. I created a page which show different products (from a oracle database) which can be selected (products are shoiwn in checkbox format). As I have a lot of product I also manage button ('Next' and 'previous') The proble is : When I select some products from on page and then I use the button 'next' or 'pervious I lose the selected product of the last page.. Is someone can help me and give me some solution ?? Thanks for your help

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Re: Temporary Storage + Sessions + Versions: How?
by Chris McDonough 15 Jan '02

15 Jan '02

Joachim Werner wrote: > As the Temporary Storage is incompatible with versions, it seems to me that > I can not at all use any session manipulating code in a method that might be > called under version control. This is very disturbing to me. I'm sorry you're disturbed. ;-) > Are there any workarounds like temporarly switching off versioning before > the SESSION.set is called? Not really. > I guess the best fix would be if Temporary Storage would actually work with > versions. This would mean to me that it should gracefully ignore the fact > that we are working in a version. You're right, TemporaryStorage should really support versions. But it doesn't; there wasn't enough time. :-( Maybe in the future, but no promises. Note that you can put the data container in a versioning storage and get around this problem now. Re: TemporaryStorage ignoring versions. I think this might be OK for some pattern of usage. However, I can imagine receiving another email from somebody saying "how dare your sessions ignore versions; this has really messed me up and you've destroyed my project". ;-) I'd probably accept a patch however that allowed you to set an environment variable to control this behavior. Thanks! - C

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Fw: ZODB based Product problem
by Antonio Carrasco 14 Jan '02

14 Jan '02

----- Original Message ----- From: "Antonio Carrasco" <antoniojezu(a)hotmail.com> To: <zope(a)zope.org> Cc: <zodb-dev-(a)zope.org>; <zope-dev(a)zope.org> Sent: Monday, January 14, 2002 11:51 PM Subject: ZODB based Product problem > Don´t forget. I´m spanish and my english may not be enough good. Have fun > with this e-mail. > > I´ve been a lot of time looking for documentation, studing it and trying to > develop usefull things with ZODB. Here is my problem. > > Well. I´m working in a Product in wich I use a ZODB to store data. I don´t > use Data.fs, I´m trying to use the ZODB with my own file and collection. I > have a product with this properties or attributes: > id: the id of the instance. > title: the title > ZODBFile: The ZODB where the user want to store the data. I use this > name to construct a FileStorage wich is like > '<ZOPEDIR>/lib/python/Products/MyZProduct/var/' + ZODBFile + '.fs > colection: The colection inside the ZODBFile. > > When someone wants to add a MyZProduct instance, I show a form to fill this > attributes. Well, the __init__ is like this: > def __init__(self,id,title,ZODBFile,Colection): > self.id=id > self.title=title > self.ZODBFile=ZODBFile > self.Collection=Colection > #Now try to connect to the database > self.colection=FileStorage('<ZOPEDIR>/.......#and the name of the > ZODBFile > > This last line make the Zope to raise an Error Message in commit in > Connection object. I don´t remember now (I´m not at work), but something > like: > "Attempt to store data from a remote database connection" > > ??????????. What´s the problem?. May my ZProduct inherit some other Class or > ZClass to be able to store the data?. > > Later I do a self.connection=db.open(). Another problem with this line. I > can´t save in my class attributes this objects. The colection, neither the > connection, and I need both to make the ZODB navigation, and the ZODB open > and close methods. > > If you need more information, I´ll post another more comprensive e-mail. > > Thanks. > Antonio Carrasco > www.grupoiud.com > PD: For spanish people I have written a How-To / Tutorial named > crearUnProducto. > www.zope.org/Members/rociana/misHowTo/crearUnProducto > >

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ZODB based Product problem
by Antonio Carrasco 14 Jan '02

14 Jan '02

Don´t forget. I´m spanish and my english may not be enough good. Have fun with this e-mail. I´ve been a lot of time looking for documentation, studing it and trying to develop usefull things with ZODB. Here is my problem. Well. I´m working in a Product in wich I use a ZODB to store data. I don´t use Data.fs, I´m trying to use the ZODB with my own file and collection. I have a product with this properties or attributes: id: the id of the instance. title: the title ZODBFile: The ZODB where the user want to store the data. I use this name to construct a FileStorage wich is like '<ZOPEDIR>/lib/python/Products/MyZProduct/var/' + ZODBFile + '.fs colection: The colection inside the ZODBFile. When someone wants to add a MyZProduct instance, I show a form to fill this attributes. Well, the __init__ is like this: def __init__(self,id,title,ZODBFile,Colection): self.id=id self.title=title self.ZODBFile=ZODBFile self.Collection=Colection #Now try to connect to the database self.colection=FileStorage('<ZOPEDIR>/.......#and the name of the ZODBFile This last line make the Zope to raise an Error Message in commit in Connection object. I don´t remember now (I´m not at work), but something like: "Attempt to store data from a remote database connection" ??????????. What´s the problem?. May my ZProduct inherit some other Class or ZClass to be able to store the data?. Later I do a self.connection=db.open(). Another problem with this line. I can´t save in my class attributes this objects. The colection, neither the connection, and I need both to make the ZODB navigation, and the ZODB open and close methods. If you need more information, I´ll post another more comprensive e-mail. Thanks. Antonio Carrasco www.grupoiud.com PD: For spanish people I have written a How-To / Tutorial named crearUnProducto. www.zope.org/Members/rociana/misHowTo/crearUnProducto

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[Warning] Weird Zope behaviour: int(1200 * 0.20000000000000001) or 1 == -2147483648
by Dieter Maurer 14 Jan '02

14 Jan '02

ZopeCVS (trunk) from 9.1.2002; Python 2.1.1; Linux 2 I just met really strange behaviour: For testing purposes, I did: export ZODB_READ_ONLY=1 python >>> import Zope This lead to a deadlock in "ThreadLock.acquire". I ran the process in GDB with breakpoints in "ThreadLock.acquire" and "ThreadLock.release". After a while, I get an exception: > File "/home/dieter/Haufe/src/Zope/lib/python/Zope/__init__.py", line 77, in ? OFS.Application.initialize(c) > File "/home/dieter/Haufe/src/Zope/lib/python/OFS/Application.py", line 316, in initialize > delNotification = delnotify, limit=limit) > File "/home/dieter/Haufe/src/Zope/lib/python/Products/Transience/Transience.py", line 114, in __init__ > self._reset() > File "/home/dieter/Haufe/src/Zope/lib/python/Products/Transience/Transience.py", line 334, in _reset > self._ring = Ring(l, index) > File "/home/dieter/Haufe/src/Zope/lib/python/Products/Transience/Transience.py", line 479, in __init__ > raise "ring must have at least one element" > ring must have at least one element Analysis reveals, that in "_reset" we have: > (Pdb) p vars(self) > {'_err_margin': 0.20000000000000001, 'id': 'session_data', '_delCallback': None, 'title': 'Session Data Container', '_timeout_secs': 1200, '_limit': 1000, '_addCallback': None, '_resolution_secs': -2147483648} "_resolution_secs" is severely wrong! It was computed by: > t_secs = self._timeout_secs > r_secs = self._resolution_secs = int(t_secs * self._err_margin) or 1 and the result should have been "240" which I get, when I evaluate the expression in "pdb". Some serious bug is lingering here. I expect a memory corruption. Dieter

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Calling every zoper, newbies to gurus
by seb bacon 14 Jan '02

14 Jan '02

First, apologies for the cross posting. I need to make sure this gets to as many people as possible, for obvious reasons... Everyone's got grumbles about how zope.org is organised. Now is the time to quit grumbling and do something about it. If you are a newbie or a guru, please take the time to respond to this email! I'm currently in the process of defining requirements for improving the zope.org website. The first part of this process is listening to the key constituencies for the site. Please note, I'm *not* planning on making a new products rating system, or a replacement for the fishbowl: I'm interested in the graphical design and informational content of the site. The questions are intended to help me understand who is using zope.org, how they use it, and what they would like it to be. If you don't want to answer all the questions, that's fine - just one answer is better than none. Reply to this email privately. I won't divulge any of the information to anyone else for any reasons, and the information will only be used to help improve the zope.org website. I will write up a report once I've received enough input, and publish the results online. Thanks for taking the time to help improve the web site... seb -=-=-=-=-=- 1) How did you hear about Zope? 2) Before you used Zope, what were you expecting? 3) How did the zope.org website change this? Did it confirm, exceed or undermine your expectations? 4) Are you: (a) just trying to find out about this zope thing (b) a zope newbie (c) a zoper of moderate ability (d) a zoper of distinction (e) a guru 5) How would you describe your role in your organisation? The following list is for guidance only - try to describe what you do in your own words. (a) developer (b) technology decision maker (c) business decision maker (d) technical architect / technical lead (e) content developer (f) content manager (g) just a hobby 6) (developers only) Give an estimate of your skill level (none, low, medium or high) for the following: (i) Client side development - HTML - Javascript - XML (ii) Server side development - ASP - PHP - ColdFusion - JSP - perl - SQL (iii) Server admin skills - Apache - IIS - mySQL - shell - postgres - oracle - ms sql server 7) Have you ever used the following products? - broadvision - vignette - interwoven - spectra - midguard - phpnuke - cocoon - mediasurface 8) Which of the technologies mentioned in questions 6 and 7 do you see as closest to Zope? (You can name more than one) 9) What is your preferred operating system? 10) If you could make one piece of information easier to find on zope.org, what would it be? 11) Graphically, what would you expect from a site like zope.org? Give examples from other sites, if possible. 12) Give 3 adjectives which describe the current zope.org website 13) Give 3 adjectives which describe how you'd like it to be 14) How often do you visit the zope.org website? 15) Which part of the current site do *you* find the most useful? 16) Give the current zope.org website a score between 1 and 10 (1=completely useless; 3=pretty bad 5=just about usable 7=pretty good 10=my favourite site) 17) Would you be happy for me to contact you again for more detail (I'm thinking of further emails or IRC sessions)? 18) Any other comments?

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Bug Or Feature in ZopeSplitter
by Andre Schubert 14 Jan '02

14 Jan '02

Hi all, After playing with Zope 2.4.3 and TextIndexes i found out that the TextIndex does not Index Digits( "12345" ). Thatswhy i looked in the sources and i saw in "next_word", that there is the caracter checked with "isalnum", but in "check_synstop" the caracter is checked with "isalpha"....? This means to me that every DIGIT is a stop-word and not a real character. If have changed the isalpha with isalnum and it seems to work... Can anyone explain this... thanks as

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Temporary Storage + Sessions + Versions: How?
by Joachim Werner 14 Jan '02

14 Jan '02

Hi! I have a problem concerning using versions and sessions together in Zope 2.5 beta 3: As the Temporary Storage is incompatible with versions, it seems to me that I can not at all use any session manipulating code in a method that might be called under version control. This is very disturbing to me. Are there any workarounds like temporarly switching off versioning before the SESSION.set is called? I guess the best fix would be if Temporary Storage would actually work with versions. This would mean to me that it should gracefully ignore the fact that we are working in a version. Joachim

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modify modification time of an object inside a product
by hoelzla＠t-online.de 14 Jan '02

14 Jan '02

dear zope gurus, i hope, this is the right place to post this: i'm trying to modify a modified ZSyncer product. The first modification implements bidirectional syncronisation. It simply exports any Zope object, transmitts it via XML-RPC and imports it remotely, or vice versa. The problem i'm trying to fix is that synced objects should have synced timestamps and not the original one vs. the importation time. My solution is to *ship* the modification time of the original object together with the object, but i don't know how to explicitly change the timestamp of the freshly imported one. the essential part of the code is the following method, which imports the object -- it gets the object data, the path of the object and its modification time (see "# change modification time"): def manage_addXMLRPC(self, data, obj_path, mod_time=0, add_in=1): """ Adds / imports an object """ # make sure we always get a string or a list if type(obj_path) == type('string'): obj_path = string.split(obj_path, '/') # object lets try finding the parent try: parent = self.restrictedTraverse(obj_path[:-1]) except KeyError: return 404 # lets check they are allowed to do this c = getSecurityManager().checkPermission allowed = 1 for perm in ['Delete objects', 'Import/Export objects']: if not c(perm, parent): allowed = 0 if not allowed: return 403 # if there is one there already, delete it if obj_path[-1] in parent.objectIds(): parent.manage_delObjects([obj_path[-1],]) # lets do it if add_in: # fake a file using StringIO file = StringIO() file.write(self._decode(data)) file.seek(0) # now import new = parent._p_jar.importFile(file) parent._setObject(new.getId(), new) # change modification time my_obj = self.restrictedTraverse(obj_path) my_obj._p_mtime = mod_time # yay! return 200 i tryed to change the modification time via the _p_mtime attribute (because bobobase_modification_time() returns it normally), but it doesn't work. I played around with it but there was no enlightenment. i guess its a secret of the ZODB. please help me to get on the right path. yours faithfully. Andreas Hoelzl

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PROPOSAL: ExplicitObjectReferences
by Casey Duncan 13 Jan '02

13 Jan '02

This is my general solution to many recurrent problems I have witnessed when developing in Zope both at a high and low level. I think it's a pretty important proposal (big surprise, I wrote it) that could have a profound affect on Zope development. Please give it a read and post your comments! http://dev.zope.org/Wikis/DevSite/Proposals/ExplicitObjectReferences Murky Buckets, Casey Duncan __________________________________________________ Do You Yahoo!? Send FREE video emails in Yahoo! Mail! http://promo.yahoo.com/videomail/

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