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MaildropHost:what is transitional email
by robert rottermann 02 Jul '05

02 Jul '05

Hi there, can anybody tell me what the transitional email in MaildropHost is? I read that it is aware of transitions. what transitions? thanks Robert

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Newbie Questions - many-many relationships? Zope 2 or 3?
by Jim Vine 02 Jul '05

02 Jul '05

Database Question Hello, I'm a newbie, so this is a newbie question! I am currently preparing to build a web application for property lettings, and I'm very interested in what Zope has to offer. The application will need to recognise a number of different objects, such as "houses", "prospective tenants" and "property owners" (the latter of which I may implement as user types, which would allow these people to log in and amend some of their own information.) I'm very interested in the Object Oriented way of doing things; for example, I'm thinking about implementing houses as a folder-ish object, so it would be able to contain photos of the house in question. The biggest stumbling block I am facing is how to do something "Relational" in an OO environment. Specifically, I've been scratching my head for a while about how to handle a many-many relationship: a property owner may own more than one house; conversely, a house may have more than one co-owner - consequently it's not appropriate to have either containing the other. I've googled for general information about handling many-many relationships in OO, and most of what I've come across has only indicated that it can be tricky! Having a look through past threads on this mailing list I've noticed a few references to mxmRelations (http://www.zope.org/Members/maxm/products/mxmRelations) which seems to match up - have I got the right end of the stick? Before I jump in with this I'd appreciate any advice or guidance you could provide - it'd be greatly appreciated. While Im on, Ive noticed that Zope 3 has been released. Is this now the recommended development environment, or am I better off sticking with Zope 2 for now, and porting my application once Zope 3 is a bit further down the line? Id greatly appreciate any guidance that can be provided on these subjects. Thanks in advance, Jim ___________________________________________________________ Yahoo! Messenger - NEW crystal clear PC to PC calling worldwide with voicemail http://uk.messenger.yahoo.com

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Re: [ZPT] Recursive structures
by Nikko Wolf 02 Jul '05

02 Jul '05

Ian Bicking wrote: > I'm surprised this has never come up for me before, but now I want to > render a recursive data structure and I'm at a loss how I might do > that in ZPT. Or, what the best workaround would be. E.g.: > > ['a', 'b', ['c', ['d', 'e']]] > > Becomes: > > <ul> > <li>a</li> > <li>b</li> > <ul> > <li>c</li> > <ul> > <li>d</li> > <li>e</li> > </ul> > </ul> > </ul> > > > I guess the template could call itself repeatedly. Which means the > list can't be embedded in any other markup. Hrm... in Cheetah I'd do: > > #def make_list(items) > <ul> > #for item in items > #if isinstance(item, list) > $make_list(item) > #else > <li>$item</li> > #end if > #end for > </ul> > #end def > $make_list(items) > > It's a code-heavy template, and maybe it should just be written in > Python, but it's also reasonable to allow people to add classes to > items, further logic, etc. > I think it should *definitely* be written in Python, although a "Script (Python)" should suffice. Add a "Script (Python)" with an ID of "make_list" and a parameter list of "items" The following is untested, but should work, I think. Beware of any special text in the strings (&,<,>,etc). ###### text = "<ul>\n" for item in items: if isinstance( item, ( list, tuple )): text += context.make_list( item ) else: text += "<li>" + str(item) + "</li>\n" return text + "</ul>" ############

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Import problem
by George Tesseris 01 Jul '05

01 Jul '05

When I try to import a specific .zexp the following error is raised: *Error Type: AttributeError* *Error Value: ('__new__', <function __newobj__ at 0x00B8B0F0>, (<extension class Shared.DC.ZRDB.DA.SQL at 01AE2728>,)) *Help please... It's crucial... George **

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python question
by Jürgen Herrmann 01 Jul '05

01 Jul '05

hi all! i think there should be no functional difference in the two code snippets below, but is there any difference in performance? (i know, the "except AttributeError" could possibly mask an AttributeError in the called function...) 1.: hook = getattr(o, '_before_transaction_commit', None) if hook: hook() 2.: try: o._before_transaction_commit() except AttributeError: pass regards, juergen herrmann _______________________________________________________________________ >> XLhost.de - eXperts in Linux hosting << Juergen Herrmann Weiherweg 10, 93051 Regensburg, Germany Fon: +49 (0)700 XLHOSTDE [0700 95467833] Fax: +49 (0)721 151 463027 ICQ: 27139974 - IRC: #XLhost@quakenet WEB: http://www.XLhost.de

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Re: TAL and Javascript
by Rushabh Mehta 01 Jul '05

01 Jul '05

Rob, I was recently working on a similar problem. You will need to use the xmlhttprequest function in Javascript do all the work. And its quite easy once you get the hang of it. Heres a good tutorial to get started: http://developer.apple.com/internet/webcontent/xmlhttpreq.html For your problem, if your required server result is a simple list, let a zope script generate a tab-delimited list and you can retrive it using the request.responseText (see the xmlhttprequest) and skip working with the XMLDOM, which can by quite annoying. Rushabh ---------------------------- Message: 8 Date: Wed, 29 Jun 2005 12:20:17 -0700 (PDT) From: Rob Boyd <boydrobh(a)yahoo.com> Subject: [Zope] TAL and Javascript To: zope(a)zope.org Message-ID: <20050629192017.66907.qmail(a)web42005.mail.yahoo.com> Content-Type: text/plain; charset=iso-8859-1 Thanks to all the responders. It gave me some ideas, but alas no luck. To clarify, I am not trying to do everything in one request. Request one generates the page, a user event (selecting an option from a form) fires another request via javascript. like: <script tal:content="python:'function getFormats() { var widget = document.getElementById('orgs'); var chosen_org = widget.options[widget.selectedIndex].value; var formats = %s; // build selection 2 options from formats ' % here.getDataFormats(chosen_org)" /> And then a user event (onChange) calls getFormats. Even with generating the script with a Python script or DTML, the problem remains (for me at least) to get a value from the DOM passed as an argument to a Python script that queries my database. If my Python script didn't take an argument, I'd have no problem. I could do this and use javascript to build the select options from the appropriate values. But I'd like to cut down on what the browser has to handle. What the user chooses in the first selection can reduce what they get to choose in selection two from 3000 choices to hundreds. I'd prefer to have the backend reduce the result set rather than having the browser do the work. I thought about AJAX (no experience), but given time constraints, looks like I'll have to load everything on the page and go from there. Rob

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Problem with ZSQLMethods/MySQL after update
by Ragnar Beer 01 Jul '05

01 Jul '05

Hi everybody! After upgrading Zope from version 2.6.4 to 2.8.0 and mysqlpython from 0.9.2 to 1.2.0 I cannot add or edit ZSQLMethods anymore, although there is an open (MySQL)db-Connection that works just fine with the same ZSQLMethods that cannot be edited or with external methods. The error I'm getting is: "There are no SQL database connections. You need to add a Zope SQL database connection before you can edit a Zope SQL Method." This happens only when using my old zope instance (which I need to) but not when using a freshly created zope instance. Is this a known problem? I couldn't find anything in my zope mailing list archive. Cheers, Ragnar P.S.: Here are the contents of my ProductManagement screen: BTreeFolder2 (Installed product BTreeFolder2 (BTreeFolder2-1.0.1)) 2005-06-20 10:35 DocFinderEverywhere (Installed product DocFinderEverywhere (DocFinderEverywhere-0.4.1)) 2003-02-14 08:39 ExternalMethod (Installed product ExternalMethod (External Method-1-0-0)) 2000-10-12 15:51 Five (Installed product Five (Five 1.0.1)) 2005-06-20 10:35 MIMETools (Installed product MIMETools) 2001-01-05 14:31 MailHost (Installed product MailHost (MailHost-1-3-0)) 2003-05-11 23:00 OFSP (Installed product OFSP (OFSP-1-0-0)) 2000-10-12 15:51 PageTemplates (Installed product PageTemplates (PageTemplates-1-4-0)) 2002-05-07 13:53 PluginIndexes (Installed product PluginIndexes) 2001-09-04 13:29 PythonScripts (Installed product PythonScripts (PythonScripts-2-0-0)) 2001-09-04 10:13 Sessions (Installed product Sessions) 2002-05-07 13:53 SiteAccess (Installed product SiteAccess (SiteAccess-2-0-0)) 2001-09-04 11:38 SiteErrorLog (Installed product SiteErrorLog) 2003-02-14 08:39 StandardCacheManagers (Installed product StandardCacheManagers (StandardCacheManagers-1-1-0)) 2001-09-04 10:13 TemporaryFolder (Installed product TemporaryFolder) 2002-05-07 13:53 Transience (Installed product Transience) 2002-05-07 13:53 ZCTextIndex (Installed product ZCTextIndex) 2003-02-14 08:39 ZCatalog (Installed product ZCatalog (ZCatalog-2-2-0)) 2000-10-12 15:51 ZGadflyDA (Installed product ZGadflyDA) 2001-01-05 14:31 ZMySQLDA (Installed product ZMySQLDA (ZMySQLDA 2.0.8)) 2003-11-30 20:17 ZODBMountPoint (Installed product ZODBMountPoint) 2005-06-20 10:36 ZReST (Installed product ZReST (1.1)) 2005-06-20 10:36 ZSQLMethods (Installed product ZSQLMethods) 2000-10-12 15:51 ZopeTutorial (Installed product ZopeTutorial (Zope Tutorial 1.2)) 2005-06-20 10:36

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Checking for an Integer Argument
by Asad Habib 30 Jun '05

30 Jun '05

Is there any way to check if an argument is an integer in Python? Offcourse, there is the int function but it chokes when passed an argument that is not a string and then the user is inconvenienced (it throws a ValueError to be specific). I guess I could check each digit of the integer to determine if its ASCII value falls within the appropriate range and if each digit passed this test, then the entire number would be an integer. Does anyone know of a simpler way that involves use of a predefined Python function? Likewise, does anyone know if a similar function exists to detect floating point numbers? Any help would be appreciated. Thanks. - Asad

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how to get info about an object (dir/type)
by gabor 30 Jun '05

30 Jun '05

hi, while working with zope, i many times have the following problem: i find a method that i can use, and the documentation (for example) says: "returns the current user". ok, but what kind of object is it? what methods does it have? usually i would simply call dir() or type() on the result object, but those are forbidden in zope. how do you usually solve this? gabor

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Calendar for Zope
by John Poltorak 30 Jun '05

30 Jun '05

I quite like Plone's Calendar, but need something similar for Zope. Any recommendations? -- John

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