July 1999 - Zope - Zope lists

Aquisition
by Jason Spisak 07 Jul '99

07 Jul '99

Just a heads up, I noticed that some of the contributed products don't acquire in Zope 2. Specifically TinyTables, and the Calendar tag. I'm curious what changed to make that happen. It's seems the same for both products. Just a shout to ask if anyone knows what spcifically changed about acquisition from Zope 1 to 2? I tried loking at the code, but got lost trying. Jason Spisak webmaster(a)mtear.com

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replicating a Zope-based website
by Jens Vagelpohl 07 Jul '99

07 Jul '99

hi everyone, here's a new one: what is the best way to replicate a Zope-based website from one machine to another? i noticed the "export" feature only exports one item at a time, but not the whole tree of objects and attributes... has anyone done this before? please let me know :) Jens Vagelpohl

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Propertysheets
by Jason Spisak 07 Jul '99

07 Jul '99

Hey gang, It anyone else having that propertysheet problem. No matter what name I give the ropertysheet, Zope won't see it. It gives me and AttributeError when I ask for propertysheets.properties.manage_editProperties All my best, -- Jason Spisak webmaster(a)mtear.com

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Acquision
by Jason Spisak 07 Jul '99

07 Jul '99

Well it looks like I am a super retard. Many apologies Ty, and Zope gang. There was something I had created that was preventing the acquisition of standard_html_footer. I should get some sleep before I post. Again accept my deepest sleepless regrets *.-) Jason Spisak webmaster(a)mtear.com

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RE: [Zope] Using Zclasses
by Alexander Staubo 07 Jul '99

07 Jul '99

Fyi, it is not documented in the Document Template Markup Language User's Guide. Not all of us venture into the sources to find features we don't see in the documentation, Michel. -- Alexander Staubo http://www.mop.no/~alex/ "What the hell, he thought, you're only young once, and threw himself out of the window. That would at least keep the element of surprise on his side." --Douglas Adams, _The Hitchhiker's Guide to the Galaxy_ >-----Original Message----- >From: Michel Pelletier [mailto:michel@digicool.com] >Sent: 7. juli 1999 04:08 >To: 'Alexander Staubo'; Zope Mailing List (E-mail); 'Michael Bernstein' >Subject: RE: [Zope] Using Zclasses > > >> -----Original Message----- >> From: Alexander Staubo [mailto:alex@mop.no] >> Sent: Monday, July 05, 1999 10:28 PM >> To: Zope Mailing List (E-mail); 'Michael Bernstein' >> Subject: RE: [Zope] Using Zclasses >> >> >> or something like that, assuming HasAttr() is an External Method that >> tests for the existence of a property (I have not found this >> functionality in Zope's built-in DTML API: The closest I you get is >> getattr, which raises an error if it fails). I implement >this function >> like so:: >> >> def HasAttr(o, attr): >> return hasattr(o, attr) >> > >The _ namespace has a hasattr. Quote DocumentTemplate/DT_Util.py: > > This variable also has attributes that provide access to standard > utility objects. These attributes include: > > - The objects: 'None', 'abs', 'chr', 'divmod', 'float', 'hash', > 'hex', 'int', 'len', 'max', 'min', 'oct', 'ord', 'pow', > 'round', and 'str' from the standard Python builtin module. > > - Special security-aware versions of 'getattr' and 'hasattr', > > - The Python 'string', 'math', and 'whrandom' modules, and > > - A special function, 'test', that supports if-then expressions. > The 'test' function accepts any number of arguments. If the > first argument is true, then the second argument is returned, > otherwise if the third argument is true, then the fourth > argument is returned, and so on. If there is an odd number of > arguments, then the last argument is returned in the case that > none of the tested arguments is true, otherwise None is > returned. > > > >-Michel > >> -- >> Alexander Staubo http://www.mop.no/~alex/ >> "What the hell, he thought, you're only young once, and threw >> himself out of the window. That would at least keep the element of >> surprise on his side." >> --Douglas Adams, _The Hitchhiker's Guide to the Galaxy_ >> >> >> _______________________________________________ >> Zope maillist - Zope(a)zope.org >> http://www.zope.org/mailman/listinfo/zope >> >> (For developer-specific issues, use the companion list, >> zope-dev(a)zope.org - http://www.zope.org/mailman/listinfo/zope-dev ) >> >

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FYI: Better URL for announcement
by Paul Everitt 07 Jul '99

07 Jul '99

FYI, the URL I sent before was one of those wonderful hacked URLs that Zope tries so hard to correct. Apparently Infoseek badly wants you to go through their front page to get to things. Anyway, try: http://biz.yahoo.com/prnews/990707/tx_digital_1.html For the Digital Creations & UserLand announcement. --Paul Paul Everitt Digital Creations paul(a)digicool.com 540.371.6909 ----------------------------------------- The Open Source Zope application server http://www.zope.org/ -----------------------------------------

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RE: [Zope] Password screens
by Michel Pelletier 07 Jul '99

07 Jul '99

> -----Original Message----- > From: Andreas Kostyrka [mailto:andreas@mtg.co.at] > Sent: Wednesday, July 07, 1999 3:42 PM > To: Michel Pelletier > Cc: 'John Eikenberry'; zope(a)zope.org > Subject: RE: [Zope] Password screens > > > On Wed, 7 Jul 1999, Michel Pelletier wrote: > > Chris is still evaluating this question. We'll let you > know as soon as > > we know. On a similar note, there will be a handful of DAs that we > > support, all others will be continue to be unsupported, and probably > > unthreadsafe unless someone patched them up. > So what DAs are being supported by DC? > We'll let you (meaning everybody) know as soon as we know. > Unthreadsafe DAs could be a performance bottleneck, but then, > one usually > could serialize the requests to two backend connections, right? > (Because each Z SQL method is a seperate transaction in SQL > speak, right?) > I don't think so, I believe the problem lies in that many of the database client libraries reference global data. If two threads enter that code at the same time, even if they are using different connections, they will step on each others concept of 'their' global data. This problem can exist at any point from the DA down to the C code that the database client library may be written in (if it's written in C, gadfly's client interface, for example, is written entirely in Python). -Michel > Andreas > -- > Win95: n., A huge annoying boot virus that causes random > spontaneous system > crashes, usually just before saving a massive project. > Easily cured by > UNIX. See also MS-DOS, IBM-DOS, DR-DOS, Win 3.x, Win98. > > > _______________________________________________ > Zope maillist - Zope(a)zope.org > http://www.zope.org/mailman/listinfo/zope > > (For developer-specific issues, use the companion list, > zope-dev(a)zope.org - http://www.zope.org/mailman/listinfo/zope-dev ) >

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RE: [Zope] Password screens
by Michel Pelletier 07 Jul '99

07 Jul '99

> -----Original Message----- > From: John Eikenberry [mailto:jae@kavi.com] > Sent: Wednesday, July 07, 1999 2:48 PM > To: Michel Pelletier > Cc: zope(a)zope.org > Subject: RE: [Zope] Password screens > > > On Wed, 7 Jul 1999, Michel Pelletier wrote: > > > As for the mysql issue, I suspect the bottleneck is purely > a MySQL thing > > if Zope doesn't behave that way all the time. Note that > even though you > > may be running Zope in threaded mode, the MySQL client library for > > python (which we did not write and do not support) is not > thread safe, > > so you should NOT run Zope 2.0 with more than one thread if > you want to > > use MySQL. Someone may want to patch the MySQLDA so that the whole > > thing is wrapped in a lock, or serializes requests before the client > > library is entered. Either way, given that no one is > paying us to do > > it, we probably won't. > > Which database adapters are thread safe? I don't see this information > anywhere on the web site, it'd be nice to know. :) > Chris is still evaluating this question. We'll let you know as soon as we know. On a similar note, there will be a handful of DAs that we support, all others will be continue to be unsupported, and probably unthreadsafe unless someone patched them up. (What inspires us to support a DA you ask? Answer: $$$) -Michel > Thanks, > > --- > > John Eikenberry > [jae(a)kavi.com - http://taos.kavi.com/~jae/] > ______________________________________________________________ > "A society that will trade a little liberty for a little order > will deserve neither and lose both." > --B. Franklin > > > _______________________________________________ > Zope maillist - Zope(a)zope.org > http://www.zope.org/mailman/listinfo/zope > > (For developer-specific issues, use the companion list, > zope-dev(a)zope.org - http://www.zope.org/mailman/listinfo/zope-dev ) >

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Re: [Zope-dev] New ZClass based on Users
by Michael Bernstein 07 Jul '99

07 Jul '99

Jason Spisak wrote: > Has anyone tried to create a new ZClass based on User Folder, and then > put a class based on Users in it? I tried this but no luck so far, I decided to drop it until I had a bit more ZClasses Zen. Michael Bernstein.

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Re: [Zope] MySQL Adapter threading (was: [Zope] Password screens)
by Christopher Petrilli 07 Jul '99

07 Jul '99

> This is very interesting to hear... I am just about to connect a MySQL > database to Zope 2.0.0a3 using ZMySQLDA. I understand the problem, but how > do I make sure Zope is running single-threaded? As I understand ZServer runs > multithreaded (provided Python is compiled --with-threads) and > ZopeHTTPServer runs on a single thread. Actually ZServer requires threads, it uses one thread for Zope and one for the server... but this would be considered "single threaded" from a DA perspective (see the document I'm going to send out this afternoon to the list summarizing a lot of DA issues). > Question: Can I tell ZServer to run with a single thread, and if yes, how > so? Or do I have to use ZopeHTTPServer if I want single thread? You just need to run ZServer with the '-t 1' or '-t1' option,, which says to only use 1 thread max. Chris -- | Christopher Petrilli Python Powered Digital Creations, Inc. | petrilli(a)digicool.com http://www.digicool.com

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