April 2002 - Zope-Dev

Future of ZPatterns
by Marcello Parra Martins 20 Apr '02

20 Apr '02

Hello, I'm new to Zope. I'm studing 'Zope Web Application Develepment and Content Management' book. Many of the examples of the book uses ZPatterns. I saw in past messages that ZPatterns will not be supported in Zope3. Is this true ?? If I create a product based on it, will it be a lost of time ??? Thanks, Marcello Parra

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Need to instantiate zclass in location other than current
by Max Slimmer 19 Apr '02

19 Apr '02

I have created a zclass and want to create a new instance of this class and have it be child of some other know object in the tree. Given that we know the path (url) to the new prospective parent how do we do this. A second question. I need to manage lists of these zobjects within other instances of the same, is there a reason to store the url vs the object(s). I have has some problems getting back a string repr of the object "<instance of .." instead of the object? It would probably be better for me (the code) to store objects thus not need to get the object each time I want to call a method... thanks, Max

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Beyond Acquisition
by jalon＠dev.in.nuxeo.com 19 Apr '02

19 Apr '02

Here is a simple code: from Acquisition import Implicit, aq_base class A(Implicit): pass class C(Implicit): pass class B(Implicit): def __of__(self, parent): # controls the wrapper used for acquisition c = C() c._parent = parent return c.__of__(parent) a = A() a.b = B() print a.b # returns <C instance at XXX> print aq_base(a.b) # returns the same <C instance at XXX> It seems there is no way to get the real 'b' attribute from a, i.e. the B instance set at the line "a.b = B()" The problem is that I want to do something like this: aa = A() cc = aq_realget(a, 'b').__of__(aa) where aq_realget would return the B instance without to try to put it in the context of a. some idea? thanks in advance. -- Julien Jalon http://www.nuxeo.com

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(no subject)
by Chetan Kumar 19 Apr '02

19 Apr '02

confirm 962940

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Zope 2.3.3 with Python 1.5.2 asyncore/asynchat
by Dirk Datzert 19 Apr '02

19 Apr '02

Hi, I have to fix the asyncore/asynchat Broken Pipe bug in the Python 1.5.2 version. Can anybody tell me how to do that ? I know that the asyncore/asynchat in Zope 2.4.4 Zserver/medusa has this fixed. Thanks, Dirk

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Re: [Zope-dev] Re: ZMI / JavaScript brainstorm
by Luca Manini 18 Apr '02

18 Apr '02

>>>>> "Chris" == Chris Withers <chrisw(a)nipltd.com> writes: > Well, is there any way I can easily tell emacs: > - If a file starts with <html> or <!DOCTYPE, then go into > html-mode > - If a file starts with #, then go into python mode? Asking "is it possibile in Emacs..." ? You are joking! I did my last lisp programming 10 years ago, but thanks to the power of (e)lisp and the wonderful documentation of Emacs I came up with the following stuff, that you can put in your init file (.emacs) ;;; hook to change a buffer mode depending on the first buffer's chars. (defun foo () "foo fun" (interactive "") ; so you can do M-x foo to test it (save-excursion ; come back to current point after execution (goto-char 0) ; go to buffer start (cond ((looking-at "##") ; are we matching pattern ? (python-mode)) ; set mode! ((looking-at "<html>") (html-mode))))) (remove-hook 'find-file-hooks 'foo) ; remove old hook (if any) (add-hook 'find-file-hooks 'foo t) ; install this one (at the end) It works like this: 1) whenever Emacs loads a file, it calls (at the end) the functions listed (registered) in find-file-hooks, 2) we register (add-hook) our function (foo) at the end (last param) of that list, 3) foo is defined with defun ..., it has no params (()), its doc string is "foo fun", and can be called interactively (not really needed), 4) foo is very simple, "cond" is the lisp version of a "case", looking-at returns true if text after point matches regular the given regexp adn in that case, "cond" evaluate the expression that follows. That's all. It is really an hack, but it works for simple cases. If you need something "a little" more elaborate let me know. For a "real solution" aks the same question on some emacs newsgroups. Regards, Luca.

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Re: [Zope-dev] Speaking of 2.6...
by Anthony Baxter 18 Apr '02

18 Apr '02

> Chris - stay in the stone age, I hear they have fire there ;-) mmm. fiiiire pretty. "Page Templates burn, don't dey. Be a shame if somefing was to happen to your nice shiny website". Anthony, who might have been spending too long in the bad places of SQL.

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Re: [Zope-dev] Speaking of 2.6...
by Anthony Baxter 18 Apr '02

18 Apr '02

>>> Toby Dickenson wrote > Do you remember what we had to type to achieve the equivalent of > dtml-let, before dtml-let was introduced? That *was* horrible. gee, I dunno... <dtml-with "_.namespace(name='foo')"> </dtml-with> has a sort of charm to it. sheesh, it's still not as ugly as ZPT. deliberately-trolling-for-ChrisW-ly yrs, Anthony -- Anthony Baxter <anthony(a)interlink.com.au> It's never too late to have a happy childhood.

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2.3.3 -> 2.5.1b2 upgrade problem
by R. David Murray 18 Apr '02

18 Apr '02

I don't know if this is a b2-specific problem or not, since this is the first time I've upgraded any of my sites beyond 2.3.3. I have a 2.3.3 Data.fs, and I copied it into a 2.5.1b2 INSTANCE_HOME setup and tried to run it. It starts, (with errors in a DA Product, but that shouldn't matter at this stage), but none of the dtml is interpreted. When I browse to the site I get the raw dtml returned to the browser. If I start with an empty Data.fs, things work fine. I need to make progress on this project, so I'm going to try to do an export/import, but if there are any other experiements anyone wants me to run to look in to this, let me know. --RDM

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Re: [Zope-dev] Speaking of 2.6...
by Anthony Baxter 18 Apr '02

18 Apr '02

>>> "Brian Lloyd" wrote > We've been trying hard to adopt this bit of Zen. If you write > REQUEST.set, you can look at it and easily see what is happening. > Same with SESSION.set. The other reason why I made SESSION all shouty-caps in SQLSession[*] is to make it _very_ obvious when it's being used. Storing stuff in a session is often one of the critical bits of a web request, so it's important to me that it be clear and easy to see this. Anthony [*] I assume the standard Zope session stuff has adopted the SESSION convention now? it wasn't in CST.... -- Anthony Baxter <anthony(a)interlink.com.au> It's never too late to have a happy childhood.

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