January 2001 - Zope-Dev

Re: [Zope-dev] ZPatterns, ZClasses, Specialists: Assigning responsibilities
by Itai Tavor 11 Jan '01

11 Jan '01

Phillip J. Eby wrote: >At 05:13 PM 12/21/00 +1100, Itai Tavor wrote: >>> >>>I think you're right about this being an OrderLineItem. A couple of fine >>>points, however... First, I don't think there needs to be an >>>"OrderLineItemsWithGraphic" specialist, since there is nothing else that >>>would talk to it. It's fine in this case to have the line item classes >>>(either with graphic or without) handle their own UI snippets. UI >>>delegation is for when an object needs to display UI for some *other* >>>object than itself, since you can always use class extenders and other >>>techniques to reshape the apparent class of an object retrieved from a >>>specialist. The interface which other objects deal with is >>>"OrderLineItem", and they simply expect a portion of the form to be >>>rendered, and it's okay for the class to handle that. >> >>I got a bit confused here... the UI snippet for uploading a graphic >>actually comes from the Graphics Specialist. > >That's fine, but it should be by way of an object that's filling the >OrderLineItem role, yes? But how can this work? If I ask for the graphic in Product.addMeToOrderForm, an OrderLineItem object doesn't exist yet. So Product has to ask the OrderLineItems Specialist for the UI snippet, and OrderLineItems gets it from the Graphics Specialist. Then Product.addMeToOrder can create a new OrderLineItem and hand it the form fields for the graphic. Although, to make it cleaner, Product would add OrderLineItems.newLineItemSnippet to the form, and OrderLineItems would decide what needs to be included in the form - so Product doesn't have to explicitly ask for a Graphic upload form. > >Or I could >>eliminate the problem by uploading the graphic from a form displayed >>by the order line item after it has been added. > >That's actually what I thought you were doing/intending. This is probably the best way... but it wasn't my original plan. I need to ask for a quantity for every added product, so I was going to have Product.addMeToOrderForm ask for quantity and for a graphic. But instead, I can add a quantity field to the product display page, next to the "Add to Order" button. Then addMeToOrderForm isn't needed at all, Product.addMeToOrder will create a new OrderLineItem object, which will then ask for the graphic if it's needed. > >>Here's the question... how many behaviors are different in the order line >>>item itself? Are you also using fulfillment line items? If the only >>>difference to the order line item is that it references some additional >>>data, then I'd say a single class would be fine. Most of the behavior >>>probably comes in on the fulfillment line item, yes? Again, you can ask >>>your FulfillmentLineItems specialist to create >>>"newLineItemFor(orderLineItem)" and let it decide what kind of >>>implementation to hand back. In this case, it probably will be a different >>>class, while for the order line items, it may or may not buy you anything. >> >>I haven't thought of using fulfillment line items... not sure what >>they are for? An order is considered fulfilled once all items have >>been shipped, so order line items are responsible for tracking >>everything that happens until a ShipmentLineItem is created. The >>order line item for a customizable product tracks the product using >>state values like 'sent to factory', 'received from factory', etc. So >>it needs a new set of state values, as well as methods like >>'sendManufacturingOrderToFactory'. >> >>What exactly does the fulfillment role you're referring to do? Does >>it do more than a shipment role? > >Fulfillment would be between ordering and shipping, covering such things as >pulling items from the warehouse to customizing them with the graphic. I >assumed that an order line item was only meaningful until you have a >completed order. You may not need the complexity, but to me it seems like >a seperate phase with a very different set of behaviors than what I would >think of as an order line item. If I were doing an app like this, I'd at >least have some sort of state/status objects to delegate these different >behaviors to. But I'd say this could be left to the taste of the chef. :) This is confusing... because in all the E-com designs I've looked at, the order state machine covers everything up to 'order fulfilled'... you're suggesting stopping the order states at 'order authorized' and moving the fulfillment states to the fulfillment object? Also, what do you mean when you say 'state/status objects'? I can understand having OrderLineItem, FulfillmentLineItem and ShippingLineItem where each covers a different range of states, but are you suggesting having separate objects just for tracking the state? -- Itai Tavor "Je sautille, donc je suis." C3Works itai(a)c3works.com - Kermit the Frog "If you haven't got your health, you haven't got anything"

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Re: [Zope-dev] New UI for 2.3
by Casey Duncan 10 Jan '01

10 Jan '01

--- Steve Alexander <steve(a)cat-box.net> wrote: > However, I do not like the 3-frame interface. I feel > that the top frame > is wasted space. The Zope logo and "Logged in as > username | Logout" > could as easily go at the bottom of the tree-view > frame on the left. > This would leave extra screen space for doing work. > I agree 100%. please change this! I like the look of it, but it serves little purpose for the space it uses. > > I also much prefer blue to black as a background > colour for the tabs and > the "Root Folder" link. The black seems a bit > overbearing. > I agree here as well. Why does the root folder need to look different anyway? Just labelling it "Root Folder" is sufficient IMHO. I think it will cause confusion for it to look so different. ===== | Casey Duncan | Kaivo, Inc. | cduncan(a)kaivo.com `-----------------> __________________________________________________ Do You Yahoo!? Yahoo! Photos - Share your holiday photos online! http://photos.yahoo.com/

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ANNOUNCE: Zope 2.3.0 alpha 2 released
by Brian Lloyd 10 Jan '01

10 Jan '01

Hello all, Zope 2.3.0 alpha 2 is now available. You can download it from Zope.org: http://www.zope.org/Products/Zope/2.3.0a2/ This release contains a number of new features, including: - SiteAccess is now a part of the Zope core - Shane Hathaway's CacheManager support and two cache manager implementations have been added - SQLMethods can now be edited using FTP and DAV aware tools - Catalogs have been improved to work much better in virtual host environments - Changes to the Web management interface designed to improve productivity, consistency and aesthetics For more information on what is new in this release, see the CHANGES.txt and HISTORY.txt files for the release: - http://www.zope.org/Products/Zope/2.3.0a2/CHANGES.txt - http://www.zope.org/Products/Zope/2.3.0a2/HISTORY.txt **Please note** that we do not build binary distributions for alpha releases - the alpha is available as a source release only. When we move into the beta period for 2.3, we will build and distribute binary releases. Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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zopectl 0.0.1
by Zope mailing lists 10 Jan '01

10 Jan '01

I recently released 'zopectl', a python script that acts as a configurable front end to the z2.py script, implementing the defacto standard unix process control commands: zopectl start, zopectl stop, zopectl restart. I wrote it to simplify management of a server that runs several zope instances, so it can also be used to start/stop/restart a collection of zope sites or any subset of that collection ('zopectl start mysite'). Configuration is based on a master file, with the ability to override any parameter for specific sites. http://www.zope.org/Members/rdmurray/zopectl While I orginally wrote it for the production machine, I'm finding it even more useful on my development machine where I have any number of Data.fs files for various projects. I now use an INSTANCE_HOME setup where I have a directory stucture like this: /usr/local/zope Zope222 Zope224 Zope230a1 sites devsite1 devsite2 devsite3 In /usr/local/zope I have a zopectl.conf file that specifies my "standard" setup for my development sites. In the individual devsite directories I have zopectl.conf files that override these global settings as necessary. Zopectl lets me set different versions of zope to run, and even different versions of python. Setting up an override configuration file has proven to be *much* easier than editing individual site start and stop scripts. And by putting zopectl in my path, I no longer have to cd into the site directory in order to do a start and stop. Anyway, I'm hoping others will find it useful, too. The version number (and the comments in the readme about bugs) are due to the fact that it hasn't seen much testing yet. It's been solid for me so far, and I've now exercised quite a few more parameters than my README comments would make it appear. --RDM

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Re: [Zope-dev] Acquisition wishlist :-)
by Dieter Maurer 10 Jan '01

10 Jan '01

Chris Withers writes: > Hmmm, I guess I like the way it is but my wishlist (damn, Christmas just > gone ;-) would be: > > for Acquisiton.Implicit, be able to do something like: > > class MyClass (Acquisition.Implicit): > > acquisition = ClassAcquisitionInfo() > > acquisition.donotacquire('index_html') This would be great. > and, likewise, for Acquisition.Explicit, to be able to to something > like: > > class MyClass (Acquisition.Explicit): > > acquisition = ClassAcquisitionInfo() > > acquisition.acquire('index_html') > acquisition.acquire('fred') You already can do that, though with a different syntax (I would need to search for in the documentation). Dieter

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Re: [Zope-dev] ZCatalog and 'fuzzy logic'
by Casey Duncan 10 Jan '01

10 Jan '01

--- "Morten W. Petersen" <morten(a)esol.no> wrote: [snip] > > It seems I misunderstood the term fuzzy logic > myself. Fuzzy logic means > if I search for a word, for example 'programmer', it > will return matches > to the words 'program', 'programming','programmable' > etc. > > I.e., it will somewhat intelligently return words > that are similar in > what they mean, using grammar rules (chopping off > endings of words and > making them match others). > > Hmm. > > Cheers, > > Morten > ZCatalog TextIndexes support this type of "wildcard" searching. I posted a message a couple of weeks ago that describes the query syntax. Search the mailing list archives for it. ===== | Casey Duncan | Kaivo, Inc. | cduncan(a)kaivo.com `-----------------> __________________________________________________ Do You Yahoo!? Yahoo! Photos - Share your holiday photos online! http://photos.yahoo.com/

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AUTHENTICATION_USER in standard_error_message cause by NotFound error
by Tim Ansell 10 Jan '01

10 Jan '01

<newbie alert> Hello. I've been using zope for a couple of months, i have found zope to be a great product and thank you for creating it. Currently i have run into a problem, i need to access the AUTHENTICATED_USER in a standard_error_message called by notFoundError in BaseRequest. I was wondering if the authentication routine can be added before the authentication routine in BaseRequest? Or if this is not possible it could be split into a function and and call it before the notFoundError call as well? There are many reasons you might want to do this, i have listed some below: * You want list possible urls the reader could have meant but don't want to show let Anonymous users see possible privileged urls * You want to provided different error messages for different people, i.e. a more advanced error for coders, a simple error for html writer, a special error for normal people * You wanted errors to only be reported it they where caused by certain users and the list could go on.... Mithro </newbie aler>

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patch to bring ZPatterns UI in line with 2.3 from CVS
by Steve Alexander 10 Jan '01

10 Jan '01

If you're using ZPatterns or PlugIns with Zope 2.3 from CVS, you can update most of the ZPatterns user-interface to the new style be replacing lib/python/Products/PlugIns/www/main.dtml with this file: http://www.cat-box.net/steve/main.dtml -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net

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How does a subclass call its ancestor's method in zope?
by Dirksen 10 Jan '01

10 Jan '01

Here is a ZClass testa, with a dtml method 'do'. Its subclass testb overrides do. How does testb call its ancestor's 'do'? In python, it can be done as 'testa.do()', but what's the equivallent in zope? Dirksen __________________________________________________ Do You Yahoo!? Yahoo! Photos - Share your holiday photos online! http://photos.yahoo.com/

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ZPatterns Non-TTW developement
by Johan Carlsson 09 Jan '01

09 Jan '01

Hi again, 1. Are there any parts of the ZPattern that demands TTW developement? After reading alote of intresting discussions I find that there is alote of talk about ZClasses, but as I understand it they can be Python subclasses of ZPattern base classes as well? 2. If I want to write a default implementation for an application storing data in a SQL database could I just subclass DataPlugins and add my SQL-methods in that class? Cheers, Johan Carlsson

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