December 1998 - Zope

RE: [Zope] - Re: Zope - Alternate authentication mechanisms
by Brian Lloyd 15 Dec '98

15 Dec '98

> Thanks for your quick response. This leads me to another question. > What (is|will be) the process for submitting code for > possible inclusion in Zope? > I realize it is Zope is an infant in the opensource world. > Perhaps a roadmap > on the Zope site would be appropriate. OpenLDAP has done > something similar. > This would allow for Digital Creations to steer the direction > of Zope while giving > outside developers things to work on. > > cef We are working out these very issues as we speak ;^) We hope to have a roadmap up on the site this week. Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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- Zope, DTML and XML
by Paul Prescod 15 Dec '98

15 Dec '98

Of course Zope must eventually move into the XML world. Zope needs to do templates. XSL also does templates. In fact templates are almost as central to XSL as they are to Zope. I would suggest that Zope should use XSL template syntax for DTML templates as far as is possible. In fact, maybe when XSL becomes popular enough, it might make sense to describe the interaction between Zope and the Python runtime in terms of XML transformations. That's for the future, though. In the meantime, the point is that the template syntax should be the same. Here are the details from the current XSL spec: "The value of an attribute of a literal result element is interpreted as an attribute value template: it can contain string expressions contained in curly braces ({})." "Within a template, the xsl:value-of element can be used to compute generated text, for example by extracting text from the source tree or by inserting the value of a string constant. The xsl:value-of element does this with a string expression that is specified as the value of the expr attribute. String expressions can also be used inside attribute values of literal result elements by enclosing the string expression in curly brace ({})." "The xsl:value-of element is replaced by the value of the string expression specified by the expr attribute. The expr attribute is required." "e.g. <xsl:value-of expr="attribute(first-name)"/>" "In an attribute value that is interpreted as an attribute value template, such as an attribute of a literal result element, string expressions can be used by surrounding the string expression with curly braces ({}). The attribute value template is instantiated by replacing the string expression together with surrounding curly braces by the value of the string expression. The following example creates an IMG result element from a photograph element in the source; the value of the SRC attribute of the IMG element is computed from the value of the image-dir constant and the content of the href child of the photograph element; the value of the WIDTH attribute of the IMG element is computed from the value of the the width attribute of the size child of the photograph element: <xsl:define-constant name="image-dir" value="/images"/> <xsl:template match="photograph"> <IMG SRC="{constant(image-dir)}/{href}" WIDTH="{size/attribute(width)}"/> </xsl:template> With this source <photograph> <href>headquarters.jpg</href> <size width="300"/> </photograph> the result would be <IMG SRC="/images/headquarters.jpg" WIDTH="300"/> When an attribute value template is instantiated, a double left or right curly brace outside a string expression will be replaced by a single curly brace. It is an error if a right curly brace occurs in an attribute value template outside a string expression without being followed by a second right curly brace; an XSL processor may signal the error or recover by treating the right curly brace as if it had been doubled. A right curly brace inside an AttributeValue in a string expression is not recognized as terminating the string expression." http://www.w3.org/TR/WD-xsl Paul Prescod - ISOGEN Consulting Engineer speaking for only himself http://itrc.uwaterloo.ca/~papresco "Sports utility vehicles are gated communities on wheels" - Anon

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- Windows95 Crash Recovery
by Norman Vine 15 Dec '98

15 Dec '98

I have been unable to use the ZOPE database after a system crash in Win95 and subsequent scandisk operation. error message DatabaseError corrupted data record at .... Is there a rccomended way to rebuild the Zope database ?? Cheers Norman Vine

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- off topic?
by Dave Goodrich 15 Dec '98

15 Dec '98

You may forgive my MacNess, but I've been spoiled by Five years of BBedit which is like an old friend. What is a good editor(what are YOU using) for Python/html. As it may be a awhile before Zope goes Mac, I'll be using my Linux box. Send back to me personally, thanks. DAve.

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- Prayer
by Pavlos Christoforou 15 Dec '98

15 Dec '98

Please please God make Documents have properties ... Pavlos

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- isPrincipiaFolderish question
by Pavlos Christoforou 15 Dec '98

15 Dec '98

Zopistas  tests object foo. How can I check the current object? I would like to have something like:  I can hold stuff  What is self in Zope? And since Documents are methods wouldn't a call to self.isPrincipiaFolderish check the parent folder and return true anyway? Thanks Pavlos

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RE: [Zope] - "folderish"?
by Paul Everitt 15 Dec '98

15 Dec '98

Pavlos wrote: > You are right about the unique nomenclature though, and > yesterday I spent > 5-6 hours greping reading the sources and trying, to get my > side-margin to > work. It was very frustrating but Zope was not initially > designed as an > open source Software so I imagine the Digicools developed > over time their This is precisely correct. What seems cute when it is an internal codebase becomes confusing for you and burdensome for us when we quickly act to make an open source release. > unique ways and nomenclature. It would take a while before most of the > tricks get exposed. I hope that the tips page on the Zope > site grows fast. We are in the midst of a mammoth internal discussion about getting our hands around the documentation needs. The first goal is to get you folks a roadmap so that you can see what to expect. We'll then start applying resources to make the items on the roadmap happen. BTW, here is our current plan for the remainder of the 1.9 beta period. On Thursday we will make a 1.9b3 release that focuses on getting the Aqueduct stuff out for relational database integration. Since it appears that beta2 went pretty smooth, we don't expect to have many core Zope issues. BTW, there were 249 downloads of the src release, 559 downloads of the binary package, of which 176 were the Windows exe distribution. The Zap distribution has had 88 downloads. We will then make the final Zope 1.9.0 release on Tuesday. This will allow us to set a baseline and start working on important next steps, such as Medusa integration, FTP support, and concurrency, plus other new features such as today's Zope Prayer. (I predict His Zoliness Jim will get a bee in his bonnet and get that taken care of sooner rather than later, but that's just conjecture) I'm also a bit overdue on trying to manage expectations for the 1.9 release. Our goals were: o make the source available o move to Python 1.5 o get things stable >From here on out, look for more energy outside of the main releases. For instance, look for better documentation resources available on the website. Look for experimental packages, such as the FTP support, that aren't distributed as part of a full release. Look for us to build in some infrastructure into zope.org to allow better integration with the community, such as a Project Library, contributed patches and code, Public CVS server, etc. And look for a proper bug reporting and feature requesting system... --Paul

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Re:[Zope] - win95 TCP/IP
by Butch Landingin 15 Dec '98

15 Dec '98

> >I want to develop Zope apps on my Win95 notebook computer without being >connected to the Internet. When I do so, I get the following message: > > File "C:\Temp\Paul's Site/lib/python1.5\BaseHTTPServer.py", line 97, >in server_bind > hostname, hostnames, hostaddrs = socket.gethostbyaddr(host) >socket.error: host not found I got the same problem as you did :( (except I have Win98 and I had this thing where the DUN connection dialog box would come up and ask me if I wanted to connect to the internet -- cancelling it would cause the code to fail!). Here's the good news though: I fixed it (I can't guarantee the reliability of this quick hack, though :(). I modified the BaseHTTPServer.py file by commenting out the offending code (starting from line #97,BaseHTTPServer.py which shows up in the error message) and adding the last line (hostname = host). This is inside the class HTTPServer in the server_bind method : ... #hostname, hostnames, hostaddrs = socket.gethostbyaddr(host) #if '.' not in hostname: # for host in hostnames: # if '.' in host: # hostname = host # break hostname = host ... I think the reason why this fails is because the socket.gethostbyaddr() call tries to bring up some network tcpip and won't work on a stand-alone Wintel system that doesn't have a network device installed (It did'nt matter that I had a hosts.txt file). All the other socket calls work though. I had an old notebook with a PCMCIA network/modem combo card and I never had a problem so I guess it had something to do with Windows detecting a network device on your system. Hope this works... BTW, You can then access this site with http://127.0.0.1:8080 ... _________________________________________________________ DO YOU YAHOO!? Get your free @yahoo.com address at http://mail.yahoo.com

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Re: [Zope] - Object-relational mapping?
by Curtis Galloway 14 Dec '98

14 Dec '98

Is the "Aqueduct" system the same as "SQL methods"? If so, it isn't really what I would consider an object-relational mapping layer. I was hoping it would be along the lines of other systems that map database tables onto data container objects, and allow you to code custom behavior for the data objects. I've been looking for an open-source system like this for some time. Am I missing a part of Zope here? --Curtis Paul Everitt wrote: > > Curtis wrote: > > I just stumbled across Zope and was intrigued by the mention > > of plans for an > > object-relational mapping layer. Could someone elaborate on this? > > Check out Jim Fulton's fabulous architecture document at: > > http://www.digicool.com/releases/bobo/BoboPOS3/BoboPOS3.html > > Note that it was written days before we decided to unify Bobo and > Principia into Zope. Thus, mentions about our "commercial database" are > moot. > > --Paul

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- More on Binary Kits
by Jim Fulton 14 Dec '98

14 Dec '98

It has been pointed out to me that I should provide some sort of testing machinery in the binary kit. I should have. In fact, this has made me rethink the binary kit a little. I think that I'll make the next binary kit look alot more like the source release. When someone builds the kit, they won't just get something they can send me, they'll also get a working Zope installation that they can try out. Duh, why didn't I think of that before. If you are thinking of creating binaries but haven't started, I suggest waiting for a new version of the binary kit. (This'll be zkit-1.9.0k3.) I probably won't get around to this till the end of this week. Jim -- Jim Fulton mailto:jim@digicool.com Technical Director (888) 344-4332 Python Powered! Digital Creations http://www.digicool.com http://www.python.org Under US Code Title 47, Sec.227(b)(1)(C), Sec.227(a)(2)(B) This email address may not be added to any commercial mail list with out my permission. Violation of my privacy with advertising or SPAM will result in a suit for a MINIMUM of $500 damages/incident, $1500 for repeats.

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