Zope-Dev January 2001

zope-dev@zope.dev

116 participants
239 discussions

Merhabalar;
by Can Canbilek 13 Dec '01

13 Dec '01

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Resize a image stored in a Oracle's BLOB Field
by Juan Javier Carrera Obrero 27 Nov '01

27 Nov '01

Hello, Thanks, I have displayed the images which them was stored in a Oracle's BLOB field, with: <dtml-call expr="RESPONSE.setHeader('content-type','image/jpeg')"> <dtml-in SQLMethod_with_a_Only_Row> <dtml-var expr="BLOB_FIELD.read()"> </dtml-in> However, I would like to resize this image. I can not do it with the "height" and "width" attributes, because the image is obtained from a Oracle's BLOB field, and no from image object (i.e.: I can not use <dtml-var "ImageObject.tag(border='5', align='left')">). How can I do it ? Thanks again !

4 3

ZCatalog scalability
by Michael Bernstein 19 Feb '01

19 Feb '01

After comsidering the feedback I got from the previous 'Massive scalability' thread, I decided to split my queries into two areas: Rack scalability and ZCatalog scalability. This email deals with the latter. Partial match (wildcard) searches have already been identified as a resource hog, depending on the size of the result list. I am more than willing to give up wildcards in my application for performance. What I am interested in for my application are two things: - ZTopics populated using one or more keyword indexes - Full text search on a single computed attribute that concatenates several fields including the aforementioned keyword index fields and a few simple string attributes (title, caption, description, etc.) I need to know how far the ZCatalog will scale using this indexing and search strategy. Does anyone have anectodal or benchmark data to suggest if (and when) I will hit a 'wall' regarding the number of objects being indexed and searched? Some anectodal data suggests that single field indexing will scale easily to 60,000 objects, what about hundreds of thousands or even millions of objects? Also, is there a way to disable wildcards in full text searches? Thanks, Michael Bernstein.

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2.3.0. Unindex_object Tried To Unindex Nonexistent
by Andy Dawkins 09 Feb '01

09 Feb '01

I'm having some more problems with the ZCatalog in Zope 2.3.0 I've got a name error in the file UnTextIndex.py Error Type: NameError Error Value: i I believe this is occuring when the catalog tries to unindex an object that isn't currently indexed. The traceback reports line 332: File /usr/zope/zope-2_3_0/lib/python/SearchIndex/UnTextIndex.py, line 332, in removeForwardEntry The line in question reads: LOG('UnTextIndex', ERROR, 'Unindex_objects tried to unindex nonexistent' ' document %s' % str(i)) The function never uses or declares i, however it does use documentId. I think perhaps the i should have been documentId but I thought i would check with you guys first. What do you think? -Andy

4 4

Interfaces Wiki & Security Stuff
by Chris Withers 07 Feb '01

07 Feb '01

Hi, How active/relevant is the interfaces wiki at: http://www.zope.org/Members/michel/Projects/Interfaces I'm trying to figure out how RoleManagers, local roles, etc work and where the work of Zope Security is actually done. I've found ZopeSecurityPolicy.py and bits of stuff in Roles.py, and a few lines in BaseRequest.py, but the picture is still kinda flakey :-S It looks like there was quite a lot of discussion on the Wiki about all this, but I'm not sure how old it is and whether anything happened from it :-( Also, the new Wiki History thing doesn't seem very meaningful/helpful to me. Apart from the occasional 'No Data Returned' and Zope error page, the list returned doesn't seem to have any changes in it. What am I doign wrong? So, where should I be looking to find out how RoleManager, Local Roles & Proxy Role work from a Python product developers point of view (in Zope 2.3) and what changes are in the pipeline? cheers, Chris

3 6

Broken FTP ZClass PUT 2.3.0
by Sean Treadway 01 Feb '01

01 Feb '01

Hi all, I have recently upgraded to 2.3.0 and it has broken my FTP support. When I try to do an FTP upload to an instance of my ZClass, it fails because it is calling the default PUT of a webdav.Collection instead of the PUT of my python base class. My setup is such: A Python product with a ObjectManger(ish) base class that overrides PUT to do special manipulation of large files. I have a bunch of ZClasses that inherit from my base classes for the management pages, meta data handling and 'live' updates. Now, instead of PUT being called on my base class, it is being called on webdav.Collection which throws an exception. In 2.3.0 ZClass inherits Base, webdav.Collection and SimpleItem where in 2.2.x ZClass only inherits from SimpleItem. Is there any way to get my old functionality back (without editing Zope)? -Sean

4 3

Fw: [Zope-dev] Storing session objects in a ZODB
by Chris McDonough 31 Jan '01

31 Jan '01

This is a forwarding of an interesting session-related discussion between Andy and I... it covers the idea of storing session states as "snapshots" at a particular time, later allowing users to select a session state. This is useful if you wish to allow users to make incremental changes to data in a session and "bookmark" a session state for later copying into the current session. This is something that the "bare" session tracking stuff won't do for you, although it can facilitate it tremendously. Input welcomed! - C ----- Original Message ----- From: "Andy McKay" <andym(a)ActiveState.com> To: "Chris McDonough" <chrism(a)digicool.com> Sent: Wednesday, January 31, 2001 1:56 PM Subject: Re: [Zope-dev] Storing session objects in a ZODB > > I think you may be trying to use sessions to do something that sessions > > don't do. You can *use* the sessioning machinery as a base to build the > > infrastructure to do such a thing, but it won't do it out of the box. I > am > > currently trying to build an "onSessionStart" and "onSessionEnd" event > into > > session data objects. If you had this capability, an arbitrary Python > > method (or DTML method or external method) could be called when a session > > data object is created and when it expires. If you were to make use of > > these hooks to copy the state of the session data object into another > > structure (related to the currently logged in user - a "checkpoint" if you > > will), you could build a catalog of session states that could be recopied > > into the current session namespace. > > > > Alternately, you could forego the use of events and just have a button > that > > says "save session state" somewhere, and copy the contents of the session > > namespace into something else. Then when a user wanted to choose a > session > > state, copy it back into the current session namespace. This is the same > > idea, it just lets the user be explicit about what session state he wants > to > > use instead of depending on the event hook to create a new state. > > Bingo, yes that's it! > > > Does this make sense? Can I cc this to Zope-Dev so we can get some > > discussion about it? > > Absolutely! > > -- > Andy McKay. > > > > > > > > ----- Original Message ----- > > > From: "Chris McDonough" <chrism(a)digicool.com> > > > To: "Andy McKay" <andym(a)ActiveState.com> > > > Sent: Tuesday, January 30, 2001 9:53 AM > > > Subject: Re: [Zope-dev] Storing session objects in a ZODB > > > > > > > > > > Andy, > > > > > > > > I'm still not sure why you wouldn't set up an external data > container.. > > if > > > > you want, you can call me at 540-371-6909 if you think you can explain > > it > > > > better over the phone... > > > > > > > > - C > > > > > > > > > > > > > > > > ----- Original Message ----- > > > > From: "Andy McKay" <andym(a)ActiveState.com> > > > > To: "Chris McDonough" <chrism(a)digicool.com> > > > > Sent: Tuesday, January 30, 2001 12:28 PM > > > > Subject: Re: [Zope-dev] Storing session objects in a ZODB > > > > > > > > > > > > > Well each user rummages through a site and saves preferences, I use > > > these > > > > > preferences for displaying things in a certain manner, generating > SQL > > > etc. > > > > > Since some of these SQL statements get quite complex, it would be > nice > > > to > > > > be > > > > > to able to pull saved session x which has a query that "looks up by > x > > by > > > y > > > > > excluding z" etc... > > > > > > > > > > So anyway I like using the ZODB for this kind of storage since it's > of > > > low > > > > > volume and a large amount of reads and the users want to use > > acquisition > > > > to > > > > > the full (we have a wacky hierarchy). If I could pull that into a > text > > > > area > > > > > to allow level editing then that would be an added bonus... > > > > > > > > > > Did that make sense? > > > > > -- > > > > > Andy McKay. > > > > > > > > > > > > > > > ----- Original Message ----- > > > > > From: "Chris McDonough" <chrism(a)digicool.com> > > > > > To: "Andy McKay" <andym(a)ActiveState.com> > > > > > Sent: Monday, January 29, 2001 5:49 PM > > > > > Subject: Re: [Zope-dev] Storing session objects in a ZODB > > > > > > > > > > > > > > > > > Sure but users want to be able acess and manipulate the stored > > > session > > > > > > > objects, without them being loaded... Im going for a bike ride > to > > > > think > > > > > > > about this one. > > > > > > > > > > > > Erm. What? :-) Can you give me an example? > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >

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Re: [Zope-dev] asynchat producer ready() method patch.
by Dieter Maurer 31 Jan '01

31 Jan '01

Donovan Baarda writes: > I remember reading ages ago on a wishlist for ZServer that someone was > thinking of adding blocking support to producers. This patch adds support > for just that in a non-intrusive way. I haven't tried applying this patch to > ZServer, but it _should_ work. What does "blocking support dor producers" mean? Dieter

3 4

REMINDER: Zope track at Python 9!
by Spicklemire, Jerry 31 Jan '01

31 Jan '01

BTW, if you have trouble "seeing" the Python9.org server, there is a mirror site: http://www1.python9.org/

1 0

REMINDER: Zope track at Python 9!
by Brian Lloyd 31 Jan '01

31 Jan '01

Hello all, Just a reminder that the ninth international Python conference is right around the corner, and that there will be a Zope track again this year. More information on the Zope Track at Python 9 may be found at: http://www.python9.org/p9-zope1.html We invite you to come out and meet fellow Zopistas, learn about Perl for Zope, the future of ZPatterns and what's in store for Zope in 2001. Note that "early bird" registration for Python 9 ends February 2nd - for more information about Python 9 or the Zope Track see http://www.python9.org/. Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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Zope-Dev January 2001