August 2004 - Zope - Zope lists

PloneCollectorNG get earliest issue/get latest issue
by Bryan Simmons 26 Aug '04

26 Aug '04

I'm trying to allow users to search for all issues within a date range. They get two text boxes to fill in the start and end dates. In my validation of the dates, I'm needing to make sure they don't specify a date range that comes before the date of the first created issue. I want to be able to catch that error and respond to them with the right feedback so they don't make that mistake again. How do I find out what the earliest date is in the cataloge? I'm thinking I would pull all issues and find the one with the earliest 'created' date. But I'm thinking there has to be a faster way. -- Regards, Bryan Simmons -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Always code as if the guy who ends up maintaining your code will be a violent psychopath who knows where you live. -- Rick Osborne -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

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problem with querying a catalog
by Henny van der Linde 26 Aug '04

26 Aug '04

Hi, I have some trouble querying a catalog. This DTML works. It get's only the edf objects in the path. <dtml-in expr="dfcatalog(meta_type='edf', path='/avin/literatuur/antroposofische_literatuur/artikelendatabase/ms')"> <a href="&dtml-absolute_url;"><dtml-var title></a> </dtml-in> This Python script doesn't work. It returns ALL the edf objects on the site. zcat=container.dfcatalog results=zcat({'query' : '/avin/literatuur/antroposofische_literatuur/artikelendatabase/ms','meta_typ e':'edf'}) Thoughts? Henny

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Enabling * searching in ZCatalog
by Jake 26 Aug '04

26 Aug '04

I have more than a few ZCatalogs and while playing around with them the other day, I noticed that a few of them could not search using wild cards like "*" and "?", they would return no results. For the life of me I could not figure out the differences between them and the ones that do search with wildcards. Anyone have a pointer? Jake ____________________ http://www.ZopeZone.com "Zoping for the rest of us"

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Problems with setCookie
by jens.walte＠kk.net 26 Aug '04

26 Aug '04

Hello, the following source should set 3 values to a cookie: <dtml-call "RESPONSE.setCookie('test1', 'value1', path='/', expires='Wed, 20 Feb 2020 20:00:00 GMT')"> <dtml-call "RESPONSE.setCookie('test2', 'value2', path='/', expires='Wed, 20 Feb 2020 20:00:00 GMT')"> <dtml-call "RESPONSE.setCookie('test3', 'value3', path='/', expires='Wed, 20 Feb 2020 20:00:00 GMT')"> but after this there's only one value in the cookie! (normaly 'value3'?) Does anybody knows the reason? I've searched for a apache-setting - perhaps there's an option to limit the cookieheaderinformations, because the script above runs perfectly on another server. Please help regards Jens Walte

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Abracadabra Object and PropertyTools Example?
by S. D. 26 Aug '04

26 Aug '04

I just ran across Maik's Abracadabra Object and PropertyTools products and they look like the answer one of my big headaches: How do I get our developers to stop using Microsoft Access and start using Zope/Plone. I installed both AO and PT in a new Plone 2.0.4 test site (Win 2k), putting Maik's products in the Data/Products folder created by the Plone installer. All the products seem to be happy. Unfortunately, I'm not quite sure what to do next. On the PropertyTools page, there is this example: ----- * Create a folder called contacts. [I understand.] * Create a "standard_object_folder" in contacts. [I assume this is another regular Zope "Folder" and not a new "standard_object_folder" that should appear in the Zope drop-down list. If so, OK. I created a folder named "standard_object_folder".] * Enter the "standard_object_folder", add a PropertyTools-Object and edit the property-sheet. Add new properties "email", "homepage" and "phone" as string-types. [There is no "PropertyTools-Object" in Zope's list. I assume this is the "PropertyObject" list item. If so, I create it but what ID should it have? I gave it an "Object" id. The new PropertyObject appears with a "Title" property. I leave "Title" as it is and add the other properties.] * Go to the Manage-Tab: Set Object-Type = Contact, Unlock "Extensible Properties". [OK.] * Enter your contacts folder. [This is the original folder we created in step 1. OK.] * Create a Catalog with id=Catalog. [There is no item in the Zope list named "Catalog" so I assume this is a "ZCatalog". OK.] * Add some contacts with the AbracadabraObject. [How do you do this? I entered the new ZCatalog named "Catalog" and selected "Abracadabra Object" from the drop-down list. Zope displayed an "Add Abracadbra Object" page which, by default, listed "Object/ID/TITLE" in three fields. When I clicked the Add button, I saw an "ERROR: Valid id is required" message. What does this mean?] * With Z-Search-Interface create a search for your contacts and here you are...;-) [I haven't made it this far yet. Is there a special procedure for Z-Search-Interface or will the defaults it uses work for an intial setup?] Any help would be appreciated! Thanks! Scott

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query variable lost with exUserFolder
by Hong Yuan 26 Aug '04

26 Aug '04

Hi there, I justed tried out exUserFolder (0.20.1 on Zope 2.7.0) to authenticate part of my site against a PostgreSQL data source, but find that after the user is correctly authenticated by the default docLogin form, the redirect back to the original URL is not working as I expected, in that all the query variables were lost. As an example, the original URL that should be protected by authentication is for example: http://192.168.192.128:8080/test/supplier/addItemForm?art=10000261 It is redirected to the docLogin form by docLoginRedirect.dtml using the following URL: http://192.168.192.128:8080/test/supplier/acl_users/redirectToLogin?destina… The query_string part of the original URL is now there anymore! Having looked at docLoginRedirect.dtml, I noticed that it called makeRedirectPath, which is supposed to calculate the correct redirect path, including query string. But the path is returned in variable destination, which is not ever used in docLoginRedirect. I think this should be a bug. Even if the query_string can be preserved by e.g. using dtml-destination in place of dtml-URL in docLoginRedirect.dtml, I still can't get the redirect to work. The docLogin form is using <FORM ACTION="&dtml-destination;" METHOD="POST"> to go back to the original page. But it seems that the ACTION field can't simply take URL with query strings. The URL is correct now, but browser shows a HTTP 500 error and displays nothing. Only when I refresh the page does the content get displayed correctly. Can someone advise how to get exuserfolder work smoothly with URL with query string? Thanks for any advice. Hong Yuan

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Social Networking over Zope
by Pablo Ziliani 26 Aug '04

26 Aug '04

Hi all, I have recently been asked to build a social network site. My first thought was to implement it on Zope, but I'm a little bit worried about concurrency and scalability. Having such a site access continuously to the database, I guess its caching possibilities are very low. Anyway, what I really looking for is some advice. Anybody here to share his/her thoughts? Any past experience? Why is that most social networks are built over ASP.NET or PHP? Thanks in advance, a lot. Pablo PS: I still have to convince my client, so...

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Question about Python with Zope/ZSQL
by John Tynan 26 Aug '04

26 Aug '04

I have, a question about using python with zope/zsql methods and wondered if anyone might be able to offer some advice. I have a python script called: addNewSurvey which, before adding a new record to a database, checks for two things: an existing surveyid and an existing listenerid both of which are colums in the same 'surveys' table. I have two python scripts: checkforsurvey(suveryid) and checkforlistener(listenerid) each of which which, on their own, successfully return a string of 'true' if a duplicate value exists. My problem, and my question, arises in the in the addNewSurvey script (see attached). What might be wrong with my syntax in addNewSurvey that is preventing me from adding a record successuflly? There are no error messages when it runs, but no visible results either? Any suggestions you might have are appreciated. John Tynan - webmaster KJZZ.org / KBAQ.or 480.774.8462

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[Ann] IncrementalSearch 0.1, ManagableIndex 0.10, AdvancedQuery 0.6
by Dieter Maurer 26 Aug '04

26 Aug '04

"IncrementalSearch" is an efficient incremental search engine supporting 'and', 'or' and 'not' queries. Unlike Zope's standard search engine, it determines hits incrementally, one at a time. It interleaves index lookup and thereby prevents the creation of large intermediate result sets and touches (almost) as few index blocks as possible. This can significantly reduce load time. Measurements comparing an incremental PathIndex with a standard Zope PathIndex showed speedups between 0.8 upto 50. Download: <http://www.dieter.handshake.de/pyprojects/zope#IncrementalSearch> "ManagableIndex" is a flexible indexing framework for the construction of efficient indexes tailorable via the Zope Management Interface. It now comes out of the box with Field-, Keyword-, Range-, Path- and WordIndexes. Unlike other index implementation which support pattern matching only for TextIndex, Managable Field-, Keyword- and WordIndexes support both glob as well as regular expression matching provided the indexed values are strings. New in version 0.10: * it now uses "IncrementalSearch" if available * an improved PathIndex with a new "depth" search option. While "level" controls the distance of the search path from the beginning (as with the standard PathIndex), "depth" controls its distance from the end (in a symmetrical way). * Fixes for unicode values Download: <http://www.dieter.handshake.de/pyprojects/zope#ManagableIndex> "AdvancedQuery" is a Zope product aimed to overcome several limitations of ZCatalog's native search function. Like ZCatalog's search, it supports elementary index searches. While ZCatalog can combine such elementary searches only by "and", AdvancedQuery allows them to be combined arbitrary with & (and), | (or) and ~ (not). While ZCatalog supports an efficient sorting via an index on one level, AdvancedQuery supports sorting via any level of (field) indexes. Moreover, it sorts the result incrementally -- only as far as you access your result. This can drastically speed up the time required for sorting. It uses Python's generators for this (and thus requires Python 2.2 or better). New in version 0.6: it now used "IncrementalSearch" if available. Download: <http://www.dieter.handshake.de/pyprojects/zope#AdvancedQuery> IMPORTANT NOTE: I consider to forbid institutions of the European Union (Commission, Council of Ministers, Parliament, ...) to use software developped by me. This is in protest against plans of the Council of Ministers to make logic (general ideas outside of a concrete technical system) and especially software patentable in Europe. Note that with such a restriction, this software will cease to be compatible with the GPL (GNU Public License). This version does not yet have the restriction but a future version may. -- Dieter

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ZWarehouse, Bizar or osComm?
by Miklos Nyiri 26 Aug '04

26 Aug '04

We use Plone and other Zope products for our company website, and time has come to open shop... Without having tested ZWarehouse and Bizar they seem to be OK, but obviously there could be many caveats. Also, I know that osCommerce is widely used and supported, has a very extensive feature set etc. So this is what we need: -three separate shops, two with about 200 products, a third that may have about 2,000 items, -easy mass upload of products, -switch off (or omit) the "buy" button/function, that is, turn the site into a product catalogue instead of a shop, -easy theme/skin creation, -MySQL (sorry), -different tax rates for product groups, -different discounts for product groups, -multiple currencies, -personalized page for regular customers, -ability to add features, -stability and stability. I guess none of the above is exceptional, so I would just rahter like to hear about your experiences and/or other suggestions... Thanks, M

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