June 2004 - Zope - Zope lists

Navigation/object relationships
by Michael Ekstrand 15 Jun '04

15 Jun '04

I am working on building a site that contains automatically-generated navigation trees and site maps. Currently, I am using a convoluted system involving properties containing a "navigation level", and am running into problems with that system as I try to extend it to handle more deeply nested parts of the site. What I am looking for is a relatively painless way to determine for an object y, contained somewhere under object x, what is the relationship/containment hierarchy from x to y? Or, at the very least, how do I obtain a given object's container? I have figured out how to do that with path expressions in TAL, but something I can do from a PythonScript would be most useful. Thanks in advance, Mike

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Making Magic with Mirrowing Folders
by Gary Duke Speer 15 Jun '04

15 Jun '04

I have been trying to configure Dieter's Mirrowing Folders Product. Using both direct _dtml-var_ links and Shane's AquisitionUnderstander I cannot see the product having any effect. I suspect it is because I do not understand either the product's intention or how to properly setup the mirrow link. For the benefit of other newbies like me, if I am mis-stating the goal of the product or any aspect of it, please say so. My understanding of the intention of the product is that it will insert a distant folder into the acquision path as if the URL routed through that folder, and it does so only when there is exact alignment of the two relative paths. For background, my objective is to have a portable-hole style solution but using only relative urls due to using virtual hosting and other reasons. relative to the site's root folder, there are two primary directory trees - common content files and objects and context-specific files. a simplistic example: .../mysite/ (relative root) .../mysite/common (branch of common content to be mirrowed into other contexts) .../mysite/common/images (folder of site-wide images) .../mysite/common/images/logos/sitelogo.gif (an image to acquire) .../mysite/englishpages (branch of context-specific content) .../mysite/englishpages/page.html (the page trying to access both specific and common content) .../mysite/englishpages/images (folder of context-specific - english language - images) .../mysite/englishpages/images/logos/sitename.gif (an image of the site name written in english) .../mysite/germanpages (branch with identical sub-structure to englishpages and to common) My impression is that .../mysite/englishpages/images is the folder that should be created as a mirrow folder and it should point to the matching common folder. That it's ID is images and it's mirrowid__ property should be set to ../common/images meaning include content that is located up one level from my containing folder, englishpages in a folder called common and in a subfolder called images. The complete magic, compared to transparent folder is that links inside page.html to the logos folder will acquire objects from both logos folders. In other words, a relative link to images/logos/sitename.gif works because the path directly accesses the file. A link to images/logos/sitelogo.gif triggers acquisition because it is not found in the .../mysite/englishpages/images/logos/ folder, so acquisition checks the .../mysite/englishpages/images/ folder, again not found. By operation of the mirrowlink acquisition checks the same subpath of the target, namely .../mysite/common/images/logos/ and should find it. If not, since mirrow is described as subpath specific, aquisition skips checking .../mysite/common/images/ and proceeds to check .../mysite/ .../ and so on up to the Zope root. In short, the mirrow is largely functionally equivalent to using the URL: ../mysite/englishpages/common/images/logos/englishpages/images/logos except that common/images is skipped over. I have tried several variations, including a link to .../mysite/englishpages/images/testimage.jpg in the hopes of returning .../mysite/common/images/testimage.jpg but no luck and .../mysite/common/images/logos/showaq does not look anywhere except each folder of the path. (During this testing VHM is off, tried on both Zope 2.6.1 and 2.7.0 to see if there was a change in the way.) Sorry this is lengthy, but I'm hoping to get my conceptual understanding improved better than I have so far by Googling the archives of this group. Maybe the result will lead to a how-to comparing LinkedFolder, TransparentFolder, PortableHole, Reference, Mirrow Folder, and the toxic Symlink product. Thank you, Duke

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Changing the Value of a Form Variable
by Asad Habib 15 Jun '04

15 Jun '04

Hello. Is it possible to change the value of an existent form variable explicitly instead of through a form submission(i.e. can I use <dtml-call REQUEST.form ...> just like I use <dtml-call REQUEST.set ...>). Any help would be greatly appreciated. Thanks. - Asad

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Increasing ulimit
by Marc Burgauer 15 Jun '04

15 Jun '04

Hi On a busy Zope instance, we're getting increasingly more often errors of "too many files open". I already added a line in the start script for that instance to increase the ulimit to 1024 (the maximum for the machine by default). I am now considering increasing the maximum for that machine to 2048 (or higher), but wanted to know if other people have experimented with this before and what risks/dangers I should be aware of doing this. Here's what my start script looks at the moment (simplified): > ulimit -n 1024 > python /customer_dir/customer_one/z2.py -X -a212.96.140.5 -w80 This is Zope 2.4 on a Solaris (Intel) box. Cheers Marc

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Zope Product to globally add/remove a property
by Gary Duke Speer 15 Jun '04

15 Jun '04

Does one of the many Zope products have a feature to walk a tree of folderish objects and globally add or remove a named property. The delete would simply take the property name as an arguement and execute on all folders having the property from the point of execution down. The add would take the Property name, the class, and the default/starting value and it it doesn't already exist, adds it. In the alternative, for a python newbie, is this something that can be created easily? Is there a trick for error suppression needed to manage the cases of deleting when the property doesn't exist or adding when already added during the recursion through subfolders. (or testing first) Thank you for any suggestions, Gary

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Inserting Rows from a dictionary
by Jerome R. Westrick 15 Jun '04

15 Jun '04

Dear zopistas: I need to update a database (postgress with pygresql) which each row contains hundreds of columns. The row is to be fully replaced with new values, which I read out of a MS-SQL database (egenix odbc/freeTDS). So I have all the values in a dictionary. Is there a way to send an update command via PyGresSql using the dictionary? OR do I really have to program (and maintain) the monster update statement? Jerry

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CookieCrumbler driving me nuts!! PLEASE HELP!
by Samir Mishra 15 Jun '04

15 Jun '04

Hi all, Been trying this forever now, and can't get it to work. I have a login page LOGIN that I get to from another page USERINFO that's a form. A user cannot go to LOGIN directly, they will be redirected to USERINFO. LOGIN is also the default page for CookieCrumbler. After users enter info in LOGIN, they're directed to a protected page. Everything works OK if the user enters the correct username/password, and they automatically log in. If a user enters incorrect user credentials, they are redirected back to LOGIN. Again, this is OK. The problem is, the redirection strips off all the REQUEST variables, including the REQUEST.SESSION data, where I'm storing other session information. The Session ID shows up as having changed! My question is - is there a way to fix this, so that during the post-login failure redirect to LOGIN, all of the request/Session information/variables is retained? TIA. Samir

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Help needed in desiging the page.
by Parimal 15 Jun '04

15 Jun '04

Dear All , In my index_html page i am using post method and retrieving information out from mysql in the form of dictionary The return statement is "return container.ResultSql(Atte=finalString).dictionaries()" Now i need to design the out put which is in dictionary in table format. can any one help me to do the formating in the form of table Thanking you Parimal

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RE: [Zope] Access Permission by Domain and without Login?
by Passin, Tom 14 Jun '04

14 Jun '04

I asked for suggestions on restricting access to otherwise anonymously-accessable pages and methods. It has been pointed out to me off line that that restriction by domain *name* can have security problems. But my terminology was misleading, becaues that is not quite what I had in mind. I am asking about restriction by specific IP number ranges, like 140.90.*.*, not by domain *name*. Cheers, Tom P > > For a Zope 2.7/Plone 2 site, I would like to restrict > (otherwise) anonymous access to certain specific pages or > methods to people making the request from specific domains. > I know that I can specify a domain for a particular user, but > I want this to apply to anyone, without any special per-user > configuration, and without requiring a login. > > Also I want to do this without putting Zope behind Apache or > any other proxy, if this is possible. > > I don't recall seeing this discussed. Does anyone have > suggestions as to how to accomplish this?

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14 Jun '04

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