June 2001 - Zope-Dev

Re: Something better than ZClasses (was: Re: [Zope-dev] Re: Zcatalog bloat problem (berkeleydb is a solution?))
by Stephan Richter 27 Jun '01

27 Jun '01

>What is ZPI? Typo: Read API > > Well, the SmartWizard would be like the frontend for it. If you want > > to see an early non-SmartWizard-framework version, look at the > > ProiektorInstaller. Just imagine you can build installers like that > > in Zope. I hope to be done with the first version on Thursday. > >Great, will you let us know? Of course. ;-) Regards, Stephan -- Stephan Richter CBU - Physics and Chemistry Student Web2k - Web Design/Development & Technical Project Management

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Re: [Zope-dev] ZPL and GPL
by Anthony Baxter 27 Jun '01

27 Jun '01

>>> Michael "R." Bernstein wrote > I guess I don't understand how licensing Python under the GPL would > prevent people from writing proprietary software in Python. embedded or frozen python. I know I'd much rather see Python embedded in applications than Tcl or (god help us all) Javascript/ECCCHMAScript. I can't see cisco agreeing to opensource IOS so that they can embed a decent language in it. -- Anthony Baxter <anthony(a)interlink.com.au> It's never too late to have a happy childhood.

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Re: Something better than ZClasses (was: Re: [Zope-dev] Re: Zcatalog bloat problem (berkeleydb is a solution?))
by Stephan Richter 26 Jun '01

26 Jun '01

> > 1. We are building a wizard that asks you all the necessary questions > > to generate a basic class framwework. > >Sounds exactly like my mk-zprod. Cool. I am going to look at it as soon as I have a second to breath. Okay, okay, you got me.... I looked at the code pretty quick. I like it from the first view. It is very clean and easy to see the functionality. I think, if you can define an ZPI for your communication, then it will be no problem to put a SmartWizard Class Generator Front-End on top of this product. > > If anyone is interested in helping developing that tool (which will be > > released under the GPL as all of the iuveno products), then I can make > > an electronic copy of my personal notes and I setup a CVS. > >If we are working to solve the same problem I'd love to lend a hand. If >you can, it would be great to see your personal notes. mk-zprod is just >an easy way to set up classes that are compliant to the Zope API, but I >have some thoughts how one could make it into a pluggable api/language >compliant-code-generator, but that might be overkill. It's definantly an >overkill :). Well, the SmartWizard would be like the frontend for it. If you want to see an early non-SmartWizard-framework version, look at the ProiektorInstaller. Just imagine you can build installers like that in Zope. I hope to be done with the first version on Thursday. I will upload the documents tomorrow though, since it is late here and I have to do some work still. I think that we will be able to combine the two products easily, once the SmartWizard is in a semi-stable state. Regards, Stephan -- Stephan Richter CBU - Physics and Chemistry Student Web2k - Web Design/Development & Technical Project Management

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TransParentFolder reverseable?
by Christian Theune 26 Jun '01

26 Jun '01

hi again ... i would like to know, how it would be possible, to reverse the function of the TransparentFolders, because i wan't to use them as a patch-like function to existing zope trees. Scenario: You have a Zope Application, that uses more than 1000 objects in the zope tree (e.g. /main) which you did sell to many customers. Every customer also had the choice to get some minor modifications to this main tree. Now I thought i could have the main tree, and use the TransparentFolders to FIRST look into these, and after not finding anything in them try the main tree. You could have a set of Folders as incremental updates to the main tree that are a bit more "atomic". Any hints? At most, i require more information of the process of finding an object, to know where to threshold the alternative search procedure. Tnx and good night. Christian Theune -- Christian Theune - ct(a)gocept.com gocept gmbh & co.kg - schalaunische strasse 6 - 06366 koethen/anhalt tel.+49 3496 3099112 - fax.+49 3496 3099118 mob. - 0178 48 33 981 reduce(lambda x,y:x+y,map(lambda x:chr(ord(x)^42),tuple('zS^BED\nX_FOY\x0b')))

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Re: Something better than ZClasses (was: Re: [Zope-dev] Re: Zcatalog bloat problem (berkeleydb is a solution?))
by Stephan Richter 26 Jun '01

26 Jun '01

>Well, it's quite logical: UML can be used to map out both software and >business development (they are, after all, two sides of the same story), >the designer can twiddle-n-polish the interface and the programmer can >take care of 'exceptional tasks' that can't easily be taken care of via >the UML interface without adding too much complexity. I agree. The facts are: - A simple DTML Zope programmers costs are okay and maybe below programmer average. - A good Zope/Python programmer will cost above average. - A good Zope/Python System-Designer is very expensive. Because of that you try to minimize the Designer's time by providing a nice tool (UML tool, such as ObjectDomain). Then you try to minimize the Python Programmers time by auto-generating the framework and only make him to fill the methods with life. Now, because we have a UML diagram, the DTML programmer can start right away with programming the DTML and HTML around the data/functional model, since the API is clear. This way you optimized several things: - Minimize the time of the expensive people. - Minimize the development time, since many people can work parallel. - Because of the above, you minimize risk and money spent. And voila, you have a well functioning RAD team.* * This assumes that your team works together well. ;-) Regards, Stephan -- Stephan Richter CBU - Physics and Chemistry Student Web2k - Web Design/Development & Technical Project Management

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Re: [Zope-dev] ZPL and GPL
by Anthony Baxter 26 Jun '01

26 Jun '01

>>> Jerome Alet wrote > I personnally would love to see both Python and Zope be GPLed. Why? No really. Exactly what do you gain from this? Assuming Zope's license becomes GPL compatible, any packages you release you can choose to GPL. Why do you think having the GPL is a good thing for the core package? Ideological reasons? How does releasing under the GPL make the world a better place? Anthony, who's seen too much of the GPLd-for-GPLs-sake. -- Anthony Baxter <anthony(a)interlink.com.au> It's never too late to have a happy childhood.

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Re: Something better than ZClasses (was: Re: [Zope-dev] Re: Zcatalog bloat problem (berkeleydb is a solution?))
by Stephan Richter 26 Jun '01

26 Jun '01

>The UML interface may be a bit far fetched, but that's because nobody has >done it yet. ;-) Well, read my other mail. ;-) Regards, Stephan -- Stephan Richter CBU - Physics and Chemistry Student Web2k - Web Design/Development & Technical Project Management

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Using db_connections from Zope products
by Tom Brown 26 Jun '01

26 Jun '01

I would like to make an SQL query directly from python code. Do I have to make a ZSQL Method dynamically, or is there another way without making the class database dependent (i.e. Gadfly, PoPy, etc), utilizing an existing db_con? Suppose I am using the ZPoPy DA and have established a database connection externally. How can I access this database and submit a query from my own class? Thanks, Tom Brown altafare(a)yahoo.com __________________________________________________ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail http://personal.mail.yahoo.com/

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ZPatterns DATA LOSS BUG and FIX (0.4.3p1 patch release)
by Phillip J. Eby 26 Jun '01

26 Jun '01

ZPatterns "0.4.3final" contains a serious bug which deletes all ZODB-stored contents of a Rack when you use the manage_pack method. This bug only affects you if you store Rack-mounted objects or attributes in the ZODB, and does not affect you if your objects are entirely contained in an RDBMS or other mechanism external to the rack. If you've upgraded to 0.4.3, please do not use manage_pack! I have uploaded new versions of ZPatterns and PlugIns to fix the problem with packing racks, and to provide "experimental" support for Zope 2.4b1. (Specifically the problems reported below with expr_globals and ts_regex have been fixed.) Please upgrade to 0.4.3p1 before using manage_pack, or if you wish to experiment with ZPatterns on Zope 2.4b1. Thanks. Thanks too, to Juan Palomar and Itai Tavor for providing information and patches. At 11:01 AM 6/26/01 +0200, Juan David Ibáñez Palomar wrote: > > >With Zope 2.4b1 and ZPatterns 0.4.3, the following error raises when >starting Zope: > >2001-06-26T08:24:40 ERROR(200) Zope Could not import Products.ZPatterns >Traceback (innermost last): > File /home/jdavid/Zope-2.4.0b1/lib/python/Products/ZPatterns/Expressions.py, line 38, in ? > (Object: ComputedAttribute) >ImportError: cannot import name expr_globals > >expr_globals is not available in Zope 2.4, the fix is: > ... > >Besides this error, there're some warnings: > >/home/jdavid/Zope-2.4.0b1/lib/python/ts_regex.py:87: DeprecationWarning: the regex module is deprecated; please use the re module > import regex, regsub #, Sync >/home/jdavid/Zope-2.4.0b1/lib/python2.1/regsub.py:15: DeprecationWarning: the regsub module is deprecated; please use re.sub() > DeprecationWarning)

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Opera seems to cause memory leak on Zope Server (Linux)
by Christian Theune 26 Jun '01

26 Jun '01

Hi everybody. I'm (trying) to work with Opera, because I love it's speed, the problem is, from time to time, a request from opera, (seems to raise on POST only) causes Zope to eat all ram it can get and all cpu available. I tried to check out and found following data: it only rises on POST requests then it rises on this requests EVERYTIME I have two files for you, tracing the conversation of an example post. The first one traces a post trying to create a DTML Method with opera 5.02 Linux, the second tries the same thing, same urls, with Netscape 4.77. -- Christian Theune - ct(a)gocept.com gocept gmbh & co.kg - schalaunische strasse 6 - 06366 koethen/anhalt tel.+49 3496 3099112 - fax.+49 3496 3099118 mob. - 0178 48 33 981 reduce(lambda x,y:x+y,map(lambda x:chr(ord(x)^42),tuple('zS^BED\nX_FOY\x0b')))

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