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Page Templates + python script example fromThe Zope Book
by Wendy Langer 25 Mar '02

25 Mar '02

Hello all, I am trying to get the "interest rate calculator" example from chapter 3 of the Zope Book to work. I created an interestRateForm page template, an interestRateDisplayTemplate, and a python script, as described in the chapter (the code was copied directly from the book and is listed at the bottom of this email for reference). When I try to use the example by pointing my browser at the interestRateForm URL(this displays correctly), I give it some values as requested, then click the calculate button. The error I get is Error Type: Undefined Error Value: years not found in 'years', at line 5, column 6 If I comment out the first line referring to the "years" variable, ie  Then I get the slightly different but probably related error Error Type: TALESError Error Value: exceptions.NameError on global name 'principal' is not defined in '', at line 6, column 8 ie referring now to the spot in the interestRateDisplay template where the python script is actually called, with "principle" being the first argument to it. As far as I can guess, these variables are not being correctly passed from the interestRateForm template to the interestRateDisplay template. I haven't reaally been able to find anything explicit about how variables are passed between page templates, how the namespace works, etc. I tried to have a look at the REQUEST object, I inserted it using <span tal:content="request"> dummy request </span> I realise there must be a better way to do this , since this prints out a godawful mess full of html tags, however i *was* able to see that the various variables were there in the request object, ie: h3>form</h3><table><tr valign="top" align="left"><th>principal</th><td>10000.0</td></tr><tr valign="top" align="left"><th>periods Does anyone have any clues as to what I need to do next to make it work? Thanks :) Wendy Langer interestRateForm **************** <html> <body> <form action="interestRateDisplay" method="POST"> <p>Please enter the following information:</p> Your current balance (or debt): <input name="principal:float"><br> Your annual interest rate: <input name="interest_rate:float"><br> Number of periods in a year: <input name="periods:int"><br> Number of years: <input name="years:int"><br> <input type="submit" value=" Calculate "><br> </form> </body> </html> InterestRateDisplay ******************* <html> <body> <p>Your total balance (or debt) including compounded interest over <span tal:content="years">2</span> years is:</p> <p><b>$<span tal:content="python: here.calculateCompoundingInterest(principal, interest_rate, periods, years)">1.00</span></b></p> </body> </html> calculateCompoundInterest ************************* """ Calculate compounding interest. """ i = interest_rate / periods n = periods * years return ((1 + i) ** n) * principal

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Setting up a dedicated Zope box
by Tom Nixon 25 Mar '02

25 Mar '02

I'm going to be setting up a Zope server soon for a public web site. The server will also be running mySQL and possibly Apache. What Operating System is recommended both from the point of view of ease of Zope installation and also stability/performance etc? Finally, what would be considered a minimum spec for such a server? Many thanks Tom

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DTML namespace from Python Script
by Terry Hancock 25 Mar '02

25 Mar '02

I could've sworn I saw the answer to this at one point, but now I can't find it: How can I access the "_" namespace in a Python Script? E.g., within a DTML Method I can use "_.SecurityGetUser()" to get the current authenticated user, but I've tried a lot of different versions in a Python Script and none of them seems to work: SecurityGetUser() _.SecurityGetUser() context.SecurityGetUser() and so on. It seems to me that I *ought* to be able to use the same calling convention in either DTML Python expressions or within a Python script. Curiously the first choice above would seem to be implied by the use of Python "builtins" such as "int()", which is refered to as "_.int()" within DTML. But I've tried it -- it doesn't work here, I just get an attribute error. It's this kind of "except on Tuesday" design that really frustrates me about Zope, in case any developers are tuned in! I could go on, but it would just be a rant. Anyone know the arcane incantation I'm supposed to use for this? Any pointers appreciated! Thanks! Terry -- ------------------------------------------------------ Terry Hancock hancock(a)anansispaceworks.com Anansi Spaceworks http://www.anansispaceworks.com P.O. Box 60583 Pasadena, CA 91116-6583 ------------------------------------------------------

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Simpler way to change ZCataloged ZClass property?
by Milos Prudek 24 Mar '02

24 Mar '02

To change a property of a ZClass, where the ZClass instance must be located using ZCatalog, I'm using this Python Script: for i in context.Catalog_Org(userid=666): rid=i.data_record_id_ obj=context.Catalog_Org.getobject(rid) obj.propertysheets.data.manage_changeProperties(userid="777") It works well. But is this the "right" way? It feels rather convoluted to me... I'd like to know if the above can be done in fewer lines, or in a less computationally expensive way. -- Milos Prudek

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Question on Perl , PHP in Zope (UVM etc)
by Marcio Marchini 24 Mar '02

24 Mar '02

Hi, When Zope runs, the Python interpreter is running the code, so far so good. But it is also possible to script Zope with Perl, so I was wondering if a new instance of the Perl interpreter is launched every time (as with the PHP Product) or if the Perl interpreter is "linked in" and reused ? If it is reused/linked, why can't the same be done for PHP ? It seems that a Universal Virtual Machine (UVM) would be ideal to allow mixing languages, right ? This way you have a common runtime (like .NET) and no need to restart a different interpreter or fight different memory models or anything. (It does not have to be .NET, something like www.smallscript.com would do too - not sure if there's any solid Open Source UVM out there, though) thanks in advance for your feedback, marcio

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WGET recursion problem.
by Jason C. Leach 24 Mar '02

24 Mar '02

hi, I am trying to get a web site from our Zope server ( Apache Proxy ). When I send wget after it, I get crazy recursive loops. Does anyone know what would cause this? Could it be the Apache/Zope ( virtual domains ), or is it the actual HTML. j. ` -- ...................... ..... Jason C. Leach .. PGP/GPG Public key at http://www.keyserver.net/ Key ID: 1CF6DA85

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restrict Add drop-down list in Folder Contents view
by John Hunter 24 Mar '02

24 Mar '02

I have a Folder and I want to restrict the types of objects the managers of that folder can add to it. In the Security tab, I can limit the kinds of objects that can be added, and this works fine, but the forbidden objects still show up in the drop down list in the Contents view. I know I can create a ZClass derived from ObjectManager and just select the limited set of Subobjects, but this imposes extra overhead and a proliferation of specialized container ZClasses. I would really just like a Folder where the manager sees only the kinds of objects he has the permission to add in the 'Add' select list. Any suggestions on how I can do this? Thanks, John Hunter Zope 2.5.x

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omni font bug still not fixed?
by marc lindahl 24 Mar '02

24 Mar '02

C'mon guys, it can't be that hard... http://collector.zope.org/Zope/26

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Batch property change of ZCataloged ZClasses
by Milos Prudek 24 Mar '02

24 Mar '02

I need to loop over a subset of ZCataloged ZClass instances, change a property, and reindex the ZClass. A simple approach fails: for i in context.Catalog_Org(userid=uid): l=i.userid l.remove(uid) rid=i.data_record_id_ obj=context.Catalog_Org.getobject(rid) obj.propertysheets.data.manage_changeProperties(userid=l) obj.reindex_object() The above Python Script will change only one ZClass instance, no matter how many exist, because when "obj.reindex_object()" is reached, it causes the loop to end immediately. A data_record_id caching makes the script work: rids=[] for i in context.Catalog_Org(userid=uid): l=i.userid l.remove(uid) rid=i.data_record_id_ rids.append(rid) obj=context.Catalog_Org.getobject(rid) obj.propertysheets.data.manage_changeProperties(userid=l) for rid in rids: obj=context.Catalog_Org.getobject(rid) obj.reindex_object() Is it a bug or feature? I run Zope 2.4.3 on Linux. -- Milos Prudek

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Re: {ZOPE] obj id
by Mark-Zimmermann＠t-online.de 24 Mar '02

24 Mar '02

Thank you but how can i use the Zcatalog or TRANSPARENT FOLDER ? CU Mark >Florent Guillaume (fg(a)nuxeo.com) wrotes: > >You could use a ZCatalog for this, or a Transparent Folder. >Also please don't post in HTML. > >Florent > > Mark Zimmermann <Mark-Zimmermann(a)t-online.de> wrote: > -=-=-=-=-=- > > i have a object (GIF Image) with the ID 1016186277 within the following > directory > > +Home > +media > +images <----- > > > > Now i want to get access to this Object. The following DTML Document > can't load the Object (File placed in HOME) > > > <dtml-var standard_html_header> > <h2><dtml-var title_or_id></h2> > <p> > <dtml-var "_.getitem('1016186277')"> > This is the <dtml-var id> Document. > </p> > <dtml-var standard_html_footer> > > > My problem is, that i need to get access to files, over there ID but i > don't know where there are ... -- Florent Guillaume, Nuxeo (Paris, France) +33 1 40 33 79 10 http://nuxeo.com mailto:fg@nuxeo.com

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