- Zope - Zope lists

RE: [Zope] Confera and Zope
by Paul Everitt 17 Jul '99

17 Jul '99

George wrote: > also, does anyoen know if Zope's Collector has been released? :) Sorry, it isn't something that we are releasing, both because we need to better support what's _already_ released and it uses software of ours that isn't free (ZTables). --Paul

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RE: [Zope] Creating an order form with multiple lines...
by Rob Page 17 Jul '99

17 Jul '99

Hi Paolo: > I am trying to create an order form for producing > orders. This form should allow the creation of a > general header of the order, and then adding line > to line to the order itself. > > Till the very last line has not been introduced, > there should be no committment on the sql DB I am > using as a data backend. > > I have some difficulties in defining the form for > the order lines. Can you provide useful > suggestions ? Assuming that the order forms were not going to be very long you might store a cookie containing a list of part_numbers on the order form and the customer_id. Each time the customer came back you'd use sql to look up the customer info and part info. Of course, when they click Purchase you do the right database thing. You shoudl read about Zopes ability to simplify the handling of lists with the :list property. Search the DTML Guide for that. You might even want to go to http://www.zope.org/Download/Contrib and check out the EMarket contributed package. It has some clever ideas. --Rob

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Re: [Zope] Zope Install on Red Hat questions
by michel＠digicool.com 17 Jul '99

17 Jul '99

Michael Stearns <michael(a)datahost.com> writes: > Hello: > > I am new to Linux and Zope. I am trying to install the 2.x src. (The > zope.org site indicated that a binary was available, but I didn't see > it.) > > I installed Red Hat 5.2. Then I installed the rpm version of Python > 1.5.2. (I had some problems with installing on top of the existing > version of Python, but I did a -replacepkgs and then it seemed to > install ok.) > > When I run %python wo_pcgi.py, I get this: > . > . > > Compiling extensions in lib/python > cp /usr/lib/python1.5/config/Makefile.pre.in . > cp: /usr/lib/python1.5/config/Makefile.pre.in: No such file or directory > > Traceback (innermost last): > File "wo_pcgi.py", line 100, in ? > File "/downloads/Zope-2.0.0a4-src/build_extensions.py", line 96, in > make('lib','python') > File "/downloads/Zope-2.0.0a4-src/do.py", line 113, in make > do("cp %s ." % wheres_Makefile_pre_in()) > File "/downloads/Zope-2.0.0a4-src/do.py", line 99, in do > if i and picky: raise SystemError, i > SystemError: 256 > You also need the Python dev RPM, alternativly you could d/l the python source and compile and install your own. Don't forget the '--with-threads' to the pyhton 'configure' script if you compile your own. -Michel

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inheritance and ZClasses
by Alex Rice 17 Jul '99

17 Jul '99

When using my own python classes as base classes for ZClasses, I want to handle constructors. So, I figured I would add:  after the #with ... createInObjectManager() in my ZClass "constructor" dtml method. But, Zope takes issue with that method name when I commit the dtml, raising a TypeError. Is there a way to call constructors from dtml methods or elsewhere in ZClasses? Other inherited methods (other than constructors) give me no troubles. Here is the traceback: ... File /usr/share/Zope-2.0.0a4-src/lib/python/DocumentTemplate/DT_Var.py,line 307, in __init__ File /usr/share/Zope-2.0.0a4-src/lib/python/DocumentTemplate/DT_Util.py, line 337, in name_param (Info: ({'': '"baseClass.__init__(self)"'}, 'call', 1, 'name')) File /usr/share/Zope-2.0.0a4-src/lib/python/DocumentTemplate/VSEval.py, line 167, in __init__ (Object: baseClass.__init__(self)) TypeError: illegal name used in expression Thanks for any advice on this, -- Alex Rice | alrice(a)swcp.com | http://www.swcp.com/~alrice Current Location: N. Rio Grande Bioregion, Southwestern USA

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New zope feature?
by Anders Qvist 17 Jul '99

17 Jul '99

(Haven't researched this one, so it might have been suggested already.) What about an DTML directive  which would be a specialized if clause, which includes its content only if the current caller has the specified role? It is often a very convenient way to create administration GUI of a website to simply include links/buttons to the respective administration pages right where the data you want to administer is displayed. Eg: normal users see only a listing of people and their phone numbers and mail addresses, whereas the administrator also have a little link at the end of each entry to a page where the entry can be edited. Anders "Quest" Qvist NetGuide Scandinavia -- Why suffer scarcity? Look for the Open Source and enter a world of plenty!

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Confera and Zope
by alan runyan 17 Jul '99

17 Jul '99

I know that Confera isnt supported, but I just got it working and its really GREAT! but here is the problem: I can get Confera to work no prob w/ Python 1.5.1 (#1, Mar 21 1999, 22:49:36) [GCC egcs-2.91.66 19990314/Li on linux-i386 but not w/ Python 1.5.2 (#1, Apr 18 1999, 16:03:16) [GCC pgcc-2.91.60 19981201 (egcs-1.1. I am running the stable version of Zope. I have to use 1.5.2 because a) it is up and running, b) i have mysql working very nice on it, c) I'm really lke Confera installed on my localmachien and wanna use it for internal discussions on projects. also, does anyoen know if Zope's Collector has been released? :) george grunyan(a)synergydc.com

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Instance methods overriding ZClass methods
by Kevin Dangoor 17 Jul '99

17 Jul '99

In http://www.egroups.com/list/zope/md1354197722.html, Jephte CLAIN noted some interesting behavior when you try to add a DTML Method in an instance that overrides a DTML Method in the ZClass. As of now (2.0a4, which I am geniunely running now), you cannot add a DTML Method of the same name as one that exists in the ZClass itself. I didn't see anything in the Collector on this. Is this the desired behavior? Kevin

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Statistics and Missing.Value...
by kent＠tiamat.goathill.org 16 Jul '99

16 Jul '99

When attempting to format Summary Statistics data with Missing.Value(s), Missing.Value apparently has an incorrect type required for the numeric format operations :  File /usr/pkg/zope/lib/python/Shared/Endicor/Tables/Mining.py, line 259, in summary_table_html File /usr/pkg/zope/lib/python/DocumentTemplate/DT_String.py, line 513, in __call__ (Object: <string>) File /usr/pkg/zope/lib/python/DocumentTemplate/DT_In.py, line 683, in renderwob (Object: data()) File /usr/pkg/zope/lib/python/DocumentTemplate/DT_Var.py, line 271, in render (Object: max-PNTR) (Info: ('max-PNTR', None, {'fmt': '%d', '': 'max-PNTR'})) TypeError: (see above) So my Summary Statistics method is expecting to format a numeric value for 'max-PNTR' but it fails because the value isn't a number. Any Suggestions? Thanks

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Zope Install on Red Hat questions
by Michael Stearns 16 Jul '99

16 Jul '99

Hello: I am new to Linux and Zope. I am trying to install the 2.x src. (The zope.org site indicated that a binary was available, but I didn't see it.) I installed Red Hat 5.2. Then I installed the rpm version of Python 1.5.2. (I had some problems with installing on top of the existing version of Python, but I did a -replacepkgs and then it seemed to install ok.) When I run %python wo_pcgi.py, I get this: . . Compiling extensions in lib/python cp /usr/lib/python1.5/config/Makefile.pre.in . cp: /usr/lib/python1.5/config/Makefile.pre.in: No such file or directory Traceback (innermost last): File "wo_pcgi.py", line 100, in ? File "/downloads/Zope-2.0.0a4-src/build_extensions.py", line 96, in make('lib','python') File "/downloads/Zope-2.0.0a4-src/do.py", line 113, in make do("cp %s ." % wheres_Makefile_pre_in()) File "/downloads/Zope-2.0.0a4-src/do.py", line 99, in do if i and picky: raise SystemError, i SystemError: 256 When I try to fire up Zope with this: % python z2.py, I get this response: Traceback (innermost last): File "z2.py", line 358, in ? exec "import "+MODULE in {} File "<string>", line 1, in ? File "/downloads/Zope-2.0.0a4-src/lib/python/Zope/__init__.py", line 10, in ? import ZODB, ZODB.ZApplication, imp File "/downloads/Zope-2.0.0a4-src/lib/python/ZODB/__init__.py", line 85, in ? import sys, ExtensionClass, TimeStamp, cPersistence, Persistence ImportError: No module named ExtensionClass Can anyone offer any suggestions on what I need to do to get the install to work? Thanks! Michael Stearns

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RE: [Zope] please help with membership design and DCOracle
by Brian Lloyd 16 Jul '99

16 Jul '99

> We are trying to build a web application that needs to have _many_ > members (kind of like a portal). We need a way to store large numbers > of member profiles, each with their own username password, > and a way to > track usage statistics. > > Zope appears to be very well suited for caching and displaying content > on the site, and we have built most of the application so far with > relatively little hassle. This is our first project using Zope and we > like it a lot. kudos! > > There is a reason for this post, however :) We need some help > validating our approach for handling members and some help with a > couple of specific problems. Please help! Sure :) > MEMBERS > The next step is to add members, which requires large numbers > of writes > to the system, particularly since the data generated by the > application > (~200K of HTML per usage) must be saved. I am looking at two > approaches > and am desperately wondering if anyone has an opinion. > > A) Store all member data as folders and properties in Zope. > B) Use a RDBMS for member data storage > > Assumptions: (please correct me if I am wrong about any of these) > I. Zope can select cached data faster than a RDBMS. > II. A RDBMS can handle frequent and/or large writes of data faster > than Zope. These are good assumptions for your situation. Also, the Zope object database is a multiple-revision db that stores updates as appends, not overwrites, so you _really_ want to avoid doing things like logging usage stats into the Zope odb in most cases. > PROBLEMS > > [ Environment: Zope 1.10.3, Linux Redhat 6, Oracle 8, > DCOracle 2.0.0 > ] > > 1. One big problem we are currently running into involves member > authentication. If we are going to avoid writing membership data into > Zope, that means usernames & passwords need to be stored in the RDBMS. > We can get this information from the user and authenticate > him/her, but > we then need a way to assign him/her a role so that we can > use standard > Zope security to protect our site. Have you looked at the UserDb product? It was built specifically to pull users (including roles and such) from an RDBMS. You can get the UserDb product from the Zope site at: http://www.zope.org/Download/Prereleases/UserDB/ It should be fairly easy figure out how to do this sort of thing by looking at the way UserDb works -- if you have any questions, let me know. > 2. Writing large amounts of data into the database seems to be a > problem as well. We are flexible about the datatype used, so > long as it > can hold ~100K of html, but are having problems with the > implementation. We tried using a LONG datatype, and then trying to > store the html using a ZSQL method containing the following code > snippets (in separate tests): > a) BODY='' > b) BODY= > We get back an oracle error "string literal too long" if the data > exceeds 4000 characters. Is there another way to write this that will > work? LONG/BLOB support is still in the process of being worked out for most of the Zope database adapters - hopefully there will be a patch for this soon. I can't really put a date on it, since we're pretty swamped with consulting work at the moment :) I'd be happy to suggest some alternative designs that you could use in the interim though, if you want them :) Hope this helps! Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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