December 2006 - Zope

tal conditional help
by David Bear 13 Dec '06

13 Dec '06

I have a page template that <div> tag to insert another template. currently I do <div content="structure here/form.pt"> form template </div> I rely on the form.pt object to exist in the folder where the template is called from. This works okay. However, I think it would be wise to put some kind of error checking in the tal to avoid sending some kind of exception to the browser. what I think would be the correct thing is to test if form.pt exists, if not do insert nothing, otherwise insert it as above. However I can't seem to locate any tal syntax that lets me do this. I found tal:condition but haven't found any examples of using a 'exists' type of condition. Any pointers? -- David Bear phone: 602-496-0424 fax: 602-496-0955 College of Public Programs/ASU University Center Rm 622 411 N Central Phoenix, AZ 85007-0685 "Beware the IP portfolio, everyone will be suspect of trespassing"

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Re: Preserving Context
by Javier Subervi 13 Dec '06

13 Dec '06

From: Jonathan <dev101@...> > targetFolder = string.join(traverse_subpath, '/') #you will have to play with this to get the right target folder for your app > aFolder = context.restrictedTraverse(targetFolder) > searchRes = aFolder.Catalog(<some search string here>) > <do something with search results here> First of all, thank you very much for your help. I'm confused. I had a programmer working for me that wrote the following code: return 0 catalog = '' try: catalog = getattr(context, context.superValues('ZCatalog')[0].id) except AttributeError: pass if catalog: return 1 Now, that works just fine if I leave the page template that calls it in the folder of a specific Web site. But when I put that template in a "root" folder that all the Web sites of the portal can call, it only gives me a printout of the tree of what's in the root folder. What I'm trying to accomplish is that it gives me the tree of the specific Web site folder from which it is called. My problem is that I frankly don't understand what my programmer wrote...how it works. Research taught me that "superValues" returns the meta_data of ZCatalog, we're popping the first element of the tuple, getting it's ID, all in context of the call, and calling that a catalog. But why do we return "1" if we get a catalog? How does that print the catalog? Then, how do I incorporate your information to achieve my goal? Thanks for any help you care to offer, Javier ____________________________________________________________________________________ Do you Yahoo!? Everyone is raving about the all-new Yahoo! Mail beta. http://new.mail.yahoo.com

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Adding a ZClass instance fail
by nienfeng 13 Dec '06

13 Dec '06

hi, every one I'm a novice to zope. when I follow the example of zoopBook2.7 (http://www.plope.com/Books/2_7Edition/CustomZopeObjects.stx#2-47) I failed in adding ZClass instance. And the errlog is below. Can someone tell me what's wrong or how sould I to fix it or where to find the answer. Thanks. by nienfeng Exception Value default __new__ takes no parameters Traceback (innermost last): * Module ZPublisher.Publish, line 121, in publish * Module Zope2.App.startup, line 240, in commit * Module transaction._manager, line 96, in commit * Module Products.CPSCompat.PatchZODBTransaction, line 175, in commit * Module transaction._transaction, line 433, in _commitResources * Module ZODB.Connection, line 484, in commit * Module ZODB.Connection, line 526, in _commit * Module ZODB.Connection, line 553, in _store_objects * Module ZODB.serialize, line 407, in serialize * Module ZODB.serialize, line 416, in _dump * Module copy_reg, line 70, in _reduce_ex TypeError: default __new__ takes no parameters

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Re: [Zope] Re: Preserving Context
by Javier Subervi 12 Dec '06

12 Dec '06

----- Original Message ---- From: Maciej Wisniowski <maciej.wisniowski(a)coig.katowice.pl> >As far as I understand you have script (say it has id 'handle_404_scr') >that handles 404 errors in 'root' folder. In this script you have >something like: ><div align="center" > tal:define="mycontext here" > tal:condition="here/hasSearchEngine(mycontext)"> > >Yes? So how is this script called? return 0 catalog = '' try: catalog = getattr(context, context.superValues('ZCatalog')[0].id) except AttributeError: pass if catalog: return 1 >I'm not sure what exactly is your case but you may try: > ><div align="center" > tal:condition="here/hasSearchEngine(here/aq_inner)"> > >or just (without passing a parameter): > ><div align="center" > tal:condition="here/aq_inner/hasSearchEngine()"> None of that worked :( The latter gave me the same as without passing "aq_inner", while the former threw errors based on syntax. TIA, Javier ____________________________________________________________________________________ Do you Yahoo!? Everyone is raving about the all-new Yahoo! Mail beta. http://new.mail.yahoo.com

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Re: Preserving Context
by Javier Subervi 12 Dec '06

12 Dec '06

From: Jonathan <dev101@...> >The script routine doesn't have to be located in root. traverse_subpath is >populated using the names of all subfolders that occur after the script file name in >the URL. So if your URL is: http:/my.web.site/folderA/scriptA/folderB/folderC, >then scriptA will receive a traverse_subpath variable (in REQUEST namespace) >that contains ['folderB', 'folderC']. Note: this will not work if there are any other >scripts, DMTL methods etc in the URL after 'scriptA'. I figured out what I was doing wrong. Apparently, the script needs to be called *before* the folders. I had put it at the end. Okay, that works, so now how do I incorporate it? I'm running into trouble here. I've rewritten the following line several times, and several times gotten it wrong. Perhaps you could steer me right? <div align="center" tal:define="mycontext python:`here.traverse_subpath`" tal:condition="here/hasSearchEngine(mycontext)"> TIA, Javier ____________________________________________________________________________________ Do you Yahoo!? Everyone is raving about the all-new Yahoo! Mail beta. http://new.mail.yahoo.com

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Re: Preserving Context
by Javier Subervi 12 Dec '06

12 Dec '06

752 From: Jonathan <dev101@...109> >In your root folder you could have a script that accesses the ZCatalog which can >be called from any subfolder and can tell where it was called from... try the >following: create a python script (tst) in your root folder that contains the >following code: > >return str(traverse_subpath) > >then invoke this script file as followings: > >http:/your.web.site/tst >http:/your.web.site/tst/folderA >http:/your.web.site/tst/folderB/folderC > >(substitute your own subfolders as required) You're going to be disappointed, but whenever I substituted in any number of valid folders, I got the same result: [] an empty set! TIA, Javier ____________________________________________________________________________________ Any questions? Get answers on any topic at www.Answers.yahoo.com. Try it now.

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Re: Preserving Context
by Javier Subervi 12 Dec '06

12 Dec '06

From: Jonathan <dev101@...> >What version of zope are you running? (I am running zope 2.9.2 on a linux box). 2.7.8 I didn't put it in 'root' since root isn't automatically called. I put it in a folder called 's' which is automatically called, then I also explicitly called it in the URL. Obviously, if the fn weren't found, Zope would have complained. It was in fact found. TIA, Javier ____________________________________________________________________________________ Do you Yahoo!? Everyone is raving about the all-new Yahoo! Mail beta. http://new.mail.yahoo.com

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Re: Preserving Context
by Javier Subervi 12 Dec '06

12 Dec '06

From: Jonathan <dev101@...> && From: Suresh V <suresh_vv@...> >In your script you could access the catalog as follows: > > afolder = context.restrictedTraverse('folderA/folderB/'+someLocalFolder) # pass 'someLocalFolder' as a parameter > catalog = afolder.Catalog # assuming you have named your ZCatalog 'Catalog' The problem with this, is that this script is used at the base of a portal with several different Web sites, therefore, the root folder of each is different. >And where is mycontext defined? You will need a tal:define="mycontext here" or something. I added the following: <div align="center" tal:define="mycontext here" tal:condition="here/hasSearchEngine(mycontext)"> ...but that didn't seem to help any: Error Type: KeyError Error Value: 'hasSearchEngine(mycontext)' Concerning your comment about the except, this script was written by an employee of mine. I'm now picking up where he left off. I cleaned it up ;) TIA, Javier ____________________________________________________________________________________ Do you Yahoo!? Everyone is raving about the all-new Yahoo! Mail beta. http://new.mail.yahoo.com

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Re: Preserving Context
by Javier Subervi 12 Dec '06

12 Dec '06

From: Suresh V <suresh_vv@...> >1. Are you using "container" rather than "context" in your script? >2. You can pass your context as a "mycontext" parameter to your script. I have this line of code in my page template for handling the 404 errors: <div align="center" tal:condition="here/hasSearchEngine"> I changed it thus: <div align="center" tal:condition="here/hasSearchEngine(mycontext)"> I tested the following script with "mycontext" as a passed parameter: return 0 catalog = '' try: catalog = getattr(mycontext, mycontext.superValues('ZCatalog')[0].id) except: pass if catalog: return 1 This threw an error concerning "mycontext". TIA, Javier ____________________________________________________________________________________ Have a burning question? Go to www.Answers.yahoo.com and get answers from real people who know.

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Permissions problem
by Jose Carlos Balderas Alberico 11 Dec '06

11 Dec '06

Greetings. I'm having a few problems with a mini application I recently developed with Zope. It has to do with the permissions settings. The idea behind my application is that it will only be used by one person. This person has his own username and password (there is an ACL Users folder within my application's folder, with this person's name, password and role). My applicaction's directory hierarcy is as follows: ---- Application main folder. ---- Pages ---- Lib ---- Python ---- SQL methods The Application main folder has "View" permission for the role to which the user in the ACL Users folder belongs. Everything seems to work right at first. This user is able to access the index page of the application,... but when he tries to navigate to a specific page (let's call it "main_gestion_html", he gets an insufficient permissions message. The problem may lay in the fact that "main_gestion_html" uses data session variables, and most important of all, python methods from another application (let's call it ZVVB2), which is located outside the Application main folder. I tried creating a new ACL user in this other ZVVB2 folder... but I still get the same access denied message. I really need help on this. I've been stuck with this for the last few days and I don't know what else to try. Any input will be highly appreciated. Thank you so much for your time. Jose Carlos.

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