June 2000 - Zope - Zope lists

Worldpilot and imap problem
by Deryk Barker 14 Jun '00

14 Jun '00

Looking through the archives I couldn't find anything which semed quite relevant, so: I'm currently running Linux mandrake 7.02 and have enabled the IMAP (4.7-7) server. I can read/write mail via netscape using imap, so I presume the setup is OK. (Although i can't quite get pine to talk to it, maybe something isn't quite right). Unfortunately, whenever I log onto worldpilot (and yes I have edited the DOMAIN.py file) the hourglass appears, presumably while attempting to fetch my mail and top shows me a python process running as zope, chewing up anything up to 80-90% of the CPU. All that seems to work is restarting zope. Trimming the contents of my mailbox down to just 6 messages didn't seem to make any difference. Anyone shed any light? Oh yes, I have applied the imap.py.diff patch to the python library. -- |Deryk Barker, Computer Science Dept. | Music does not have to be understood| |Camosun College, Victoria, BC, Canada| It has to be listened to. | |email: dbarker(a)camosun.bc.ca | | |phone: +1 250 370 4452 | Hermann Scherchen. |

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Re: [Zope] sequence-item as a method argument
by Rik Hoekstra 14 Jun '00

14 Jun '00

Hello again I´m still testing the usability and reliability of Zope. To accomplish this goal I am developing a very very simple shopping cart. But I got troubled by something aparently simple. This is the code: <dtml-in "SESSION['cartItems']"> <dtml-in "sqlSearchProduct(productID=sequence-item)"> <tr><td><dtml-var productName></td><td><dtml-var price></td></tr> </dtml-in> </dtml-in> SESSION['cartItems'] is an array created in another DTML document using the well known SQLSession product. Here I am retrieving the itens of this array and passing it to a ZSQL method to get the selected items. The sqlSearchProduct, alone, works well. If I substitute the inner <dtml-in "sql...> for a simple <dtml-var sequence-item> the block works fine, otherwise it gives me the following error: Zope has encountered an error while publishing this resource. Error Type: NameError Error Value: sequence change the line - <dtml-in "sqlSearchProduct(productID=sequence-item)"> to + <dtml-in "sqlSearchProduct(productID=_['sequence-item'])"> in the line as it is now, sequence-item is interpreted as a Python expression, meaning sequence minus item. The second incantation gets the variables 'sequence-item' from the current namespace _ hth Rik

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pcgi.pid question?
by kwan 14 Jun '00

14 Jun '00

These couple days, I first set up a test mechine to test Zope with IIS through pcgi. On this test mechine, things work as I expect. However, when I move to the main server and go through exactly the same setup step. Things become strange. I got an error said counld not lock the database file. I check as much things as I can think of. and I found that.. when I start up the Zope on the main server. under var/ the z2.pid and pcgi.pid is the same. It make sense to me since they need to access the same database file. However right after I try on brower with http://localhost/scripts/zope.pcgi, beside the above error message, I found that the pcgi.pid got changed. Checking my test mechine, however, no matter what link I click and try, pcgi.pid still remain the same as z2.pid. What's wrong with these? pcgi.pid suppose to be the same as z2.pid isn't it? So what makes the pcgi.pid got changed? Kwan

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Help with Zope/Python Evangelism
by Joseph Santaniello 14 Jun '00

14 Jun '00

Hello Everyone, I've been using Zope and Python in my own projects for over a year now, and I am convinced well beyond a shodow of a doubt that "Zope Is The Answer" and have used it for several of our internal applications, and use Python almost exclusivly for our scripting needs. Here's the problem: Our main outside vendor (whom all managment besides me are very happy with) has a new agenda for forward development: "Industry Standards" such as Delphi (for backend!) and other things I deem silly. So I need as much information as anyone is willing to share on Zope/Python implementations in as large/corporate a setting as possible. Thanks, Joe PS: I've seen all the listings on the Python and Zope websites, but I need more! -- Joseph Santaniello Chief Technology Officer Westlake Financial Services 4751 Wilshire Blvd. Suite 100 Los Angeles, CA 90010 (323) 692 4129 http://www.westlakefinancial.com

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Post method redirection / Core changes
by Phill Hugo 14 Jun '00

14 Jun '00

Hello all, We recently had a "sales engineer" from Allaire come and talk to us about Spectra and were quite surprised at how similar it is to Zope. To be honest the only thing I left with any "ooh, thats neat" feeling about was their general style of building objects with the admin view optionally identical to the user view but with icons inserted below images, content etc to allow immediate altering of the content. The same stuff is simple to acheive in Zope, almost. Make a ZClass, add index_html which adds a header, footer and puts render_html in the middle. Then use render_html to embed it in other docs and index_html to view it standalone. Add a check to see if the user is logged in and has View management screens rights, if so give them little icons "in place" to edit the content and images. This works fine.. <dtml-if "AUTHENTICATED_USER.has_permission('View management screens', '')"> <a href="<dtml-var id>/propertysheets/Basic/manage"> <dtml-var "content_image.tag(border=0)"></a> </dtml-if> Now, this part is simple enough but it leads to a problem. The default methods for updating ZClass properties and images all redirect back to manage_main by the look of things. I propose that two things be added to this to allow simple management of redirection from the update/edit/change methods. 1) All instances of manage_main be changed to manage_workspace so the default view if given rather then contents_html. 2) That an optional redirect url can be supplied to everywhere this happens to override the redirect. Then once a user logs into the site, leaves the admin view after perhaps joining a version and travels through the site, it has extra icons immediately allowing them to edit the contents of certain things. The redirection would take them back to the extended user side view after pressing submit. I've looked at Image.py in OFS and this is fairly simple but I thought I'd suggest it so we could perhaps form some standard on the redirect url variable that would be passed about. Any thoughts? Phill ps. I've not looked at the DestinationURL stuff properly to see if it does anything like I'm asking.

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cannot login
by Hellekin O. Wolf 14 Jun '00

14 Jun '00

I've been bumping into the following problem a few times : 1. I install Zope 2.2.0b1 2. I run it and go to localhost:8080 3. I click on manage and go to the manage screen 4. I add a user with a password. 5. I exit Netscape 6. I start netscape again and go to localhost:8080 7. Click on manage and enter the new user login and password 8. Access denied. 9. I login as superuser 10. I go to the user profile to check my new user : I find that theconfirm_password field is one character less than the password field. 11. I cry... Does someone had the same problem ?

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Z ODBC and W2K
by Jake LeBeau 14 Jun '00

14 Jun '00

Hello all, I'm trying to install the Z ODBC DA product on Windows 2000 Server. I placed the .tar into the top level directory of my Zope installation, but when I restarted the service, the product did not install. I also tried starting Zope with the .bat file, but with the same results. So I copied the installed product from another (working NT) Zope installation onto the W2K server, and while it does make the product available, the link to the icon is broken, and the db connection doesn't work either. Does anyone know how I can get this to work? TIA, Jake LeBeau <jlebeau(a)pobox.ci.boise.id.us>

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Re: [Zope] Costs of implementation
by Cary O'Brien 14 Jun '00

14 Jun '00

> I am trying to motivate the use of Zope / Zcommerce, and to do this need > some timing ideas - Does anyone have thoughts on how long (man hours per > expertise) it took them to go from no Zope to (Zope + Steve Spickelmire and > Co's EMarket) and to a successful transaction? > > Hopefully this will be of general interest for anyone doing a business case > or planning, so if you have any thoughts on "we expected x by experienced y" > it should make interesting reading. > Zope has a sigmoidal[0] (is that the word?) learning curve. Out of the box it installs *very* nicely on unixen, and you can clickety-clickety around and create folders [1], upload files, and set up a static web site pretty easily. Then you want to connect up a database. My experience is limited to PostgreSQL, but the sigmoidal shape repeated itself. The database adapter dropped in without a hitch, and simple queries worked great. I implemented a reasonable database-backed problem tracking system for our company last summer in about 2 weeks of fiddling around and 2 solid weeks of implementation (my sql/web skills are ok, my python knowledge is um, a work in process). And it has been operating flawlessly for over a year. But then comes the steep part. Anytime you mix several languages inside themselves, things are hard. Productive as hell if you get it write, but hard. With Zope you've got to wrangle HTML, DTML, Python (at least for expressions) and SQL if you're connected to a database. A misplaced quote, comma, or bracket can throw you off for a long time. Ok, we've got the source, but debugging Zope stack dumps can be a pain. But after a while it gets better. I *think* I'm starting to at least see the shallow part of the learning curve at the top, where you can do things like implement a ZClass container that acts like a Dynamic HTML layer in an afternoon. Which I did, but only after 3 very bad false starts. The base Zope documentation needs some work. The HOWTOS and TIPS have saved the day many, many times. But back to the business case. My feeling is that even with the steep bits of the learning curve, Zope is a big win for implementing services. Zope wins because if you do a good job getting things working, you have an incredibly flex able system for dealing with the inevitable never ending stream of change requests. And thats where the payoff is. At list I *hope* so :) -- cary [0] S-shaped. like this ( _/-). shallow/steep/shallow.

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Referring to a total-xxx variable
by icottee＠bluefountain.com 14 Jun '00

14 Jun '00

Following on from my last posting I seem to have made a lot of progress - although still not sure if what I have done is the right thing or not. However, please somebody put me out of my misery. In the following code snippet the dtml-var part works fine. How can I, therefore, add count-id to v_allItems? It seems to think I am trying to do subtraction. I've spent a couple of hours trying to find the mystical incantation. <dtml-in "PARENTS[0].objectValues(['TimeSheet'])"> <dtml-var count-id> <dtml-call "REQUEST.set('v_allItems', v_allItems + count-id)"> </dtml-in> Ian Cottee Nagoya, Japan

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Zope and PTK newbie questions- showing the database items
by sean＠horse101.com 14 Jun '00

14 Jun '00

I am trying to figure out how to use Zope and particularly the PTK to create an Intranet. I am new to zope and so am unsure of where the documentation is located to do the following (wish the PTK doc had complete "manager" section): Q: How does one show the various links, files, etc as a separate page of links, files, or whatever? In other words, what is the syntax? Q: How do you add variables such as catagories to each of the PTK items to post so that when you do show them they are listed by category? Again, syntax. Any general info about where to get info on how to display data from the zope database would be great. Thanks in advance.

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