openflow-dev

[Openflow-dev] OpenFlow editor 0.3

[Daniele <d.t...@ic...>]

Dear openflowers,

I'm glad to be telling you I just posted the third version of the OpenFlow editor: OpenFlowEditor_0_3_tgz. Go get it at:
http://www.openflow.it/EN/Download/index_html

With this tool you can graphically draw your process through a bubbles and arrows interface. Suggestions for improvements, comments and opinions are warmly welcome.

Cheers,
	Daniele =)


PS: you might have to refresh your web-page to see the rendering change. Anybody with a solution for this?


-- 
Daniele Tarini - Research & Development - Icube S.r.l.
Address:        Via Ridolfi 15 - 56124 Pisa (PI), Italy
E-mail: d.t...@ic...     Web:    http://www.icube.it
Phone:  (+39) 050 97 02 07      Fax:    (+39) 050 31 36 588

[Openflow-dev] Help Please.....

[Andrew H. - L. <ah...@li...>]

Hi,

I'm very new to openflow (to say the least) and need to get it up and 
running asap. I've installed zope and unpacked OpenFlow in the 
appropriate directory. What I'm really lacking is the information on how 
to use OpenFlow. I have no idea how to even open the application (in the 
browser).

Could someone please help me out, I'm really lost with this one and need 
to get to it asap. If there is a url that will get me into the 
application I should be right from there.


For anyone that can help me, I'd be very greatful for any help.


Thanks,


ps I can't speak Italian

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B. Comp. Sc.                                             

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Re: [Openflow-dev] CMF Openflow 1.0.8

[Francesco C. <cir...@ti...>]

Hi,=20

yes, there was a problem with catalog using Zope 2.6.1 ....
the good news is that it as been fixed (some weeks ago in cvs) together w=
ith=20
other minor bugs; the "bad" news is that the you have to download it from=
 cvs=20

I will also update the tar (Package), I promise! :)

cheers,
francesco.


On Friday 04 April 2003 22:41, Cole, Timothy wrote:
> Hi,
>
>
>
> I have installed the CMFOpenflow/RefLab (1.0.8) and at first appearance=
s it
> seems to have some issues with the Catalog.
>
>
>
> For example, I follow the steps listed below...
>
>
>
> 1.                   Create an OpenFlow object (Openflow Reflab, since =
it
> is outside a CMF) name testwf
>
> 2.                  Within the testwf object, I create a process called
> testpr with default begin/end activities.
>
> 3.                  I create a Begin-End transition.
>
>
>
> When I return to the Worklist tab, I see several Process Entries, each
> titled Catalog.  It looks like this.
>
>
>
>
> Process: Catalog
>
>
> Process: Catalog
>
>
> Process: Catalog
>
>
> Process: Catalog
>
>
> Also, when I look to the process instances tab, I see this.
>
>
>
> Title (Id)    Status        Workitems
>
> ( active / total )
>
> (Catalog)                   0/ 0
>
> (Catalog)                    0/ 0
>
> (Catalog)                    0/ 0
>
> (Catalog)                    0/ 0
>
>
>
> Now, I haven't created any process instances yet.  I only see a Catalog
> entry, which as I've shown shows up in process instances and worklist t=
abs,
> for each object that was created in my OpenFlow object.  The count of
> entries matches the number of objects that have already been created in
> this OpenFlow.
>
>
>
> 1 for the "Process Definition" (i.e. testpr)
>
> 1 for the "Begin" activity
>
> 1 for the "End" activity
>
> 1 for the "Begin_End" transition
>
>
>
> Is anyone else seeing this?
>
>
>
> I have the following environment
>
>
>
> Solaris 8
>
> Zope 2.6.1
>
> Python 2.1.3
>
> CMFOpenflow/Reflow 1.0.8
>
> Plone 1.0.1  (Even though my workflow is external to my plone CMF)
>
>
>
> I was previously running Openflow 1.0.5 in this Zope environment, altho=
ugh
> I removed my 1.0.5 openflow object.
>
>
>
>
>
> Cheers,
>
>
>
> Tim

=2E.....................................................
Francesco Ciriaci @ Reflab=20
Cell. (+39) 333 4284675=20
http://www.reflab.it

[Openflow-dev] CMF Openflow 1.0.8

[Cole, T. <Tim...@us...>]

Hi,

 

I have installed the CMFOpenflow/RefLab (1.0.8) and at first appearances it
seems to have some issues with the Catalog.

 

For example, I follow the steps listed below...

 

1.                   Create an OpenFlow object (Openflow Reflab, since it is
outside a CMF) name testwf

2.                  Within the testwf object, I create a process called
testpr with default begin/end activities.

3.                  I create a Begin-End transition.

 

When I return to the Worklist tab, I see several Process Entries, each
titled Catalog.  It looks like this.

 


Process: Catalog


Process: Catalog


Process: Catalog


Process: Catalog


Also, when I look to the process instances tab, I see this.

 

Title (Id)    Status        Workitems 

( active / total )  

(Catalog)                   0/ 0  

(Catalog)                    0/ 0  

(Catalog)                    0/ 0  

(Catalog)                    0/ 0  

 

Now, I haven't created any process instances yet.  I only see a Catalog
entry, which as I've shown shows up in process instances and worklist tabs,
for each object that was created in my OpenFlow object.  The count of
entries matches the number of objects that have already been created in this
OpenFlow.

 

1 for the "Process Definition" (i.e. testpr)

1 for the "Begin" activity

1 for the "End" activity

1 for the "Begin_End" transition

 

Is anyone else seeing this?

 

I have the following environment

 

Solaris 8

Zope 2.6.1

Python 2.1.3

CMFOpenflow/Reflow 1.0.8

Plone 1.0.1  (Even though my workflow is external to my plone CMF)

 

I was previously running Openflow 1.0.5 in this Zope environment, although I
removed my 1.0.5 openflow object.

 

 

Cheers,

 

Tim

 

 

 

 

Re: [Openflow-dev] endFallout doesn't forwards

[Daniele <d.t...@ic...>]

Hello Roberto,

the behaviour is not erroneous. The philosophy behind all this fallin/fallout 
is:

 - Something exceptional occurs and a workitem goes in fallout (meaning falls 
out of the workflow process, i.e. workitem is exceptional)

 - Someone fixes the exception (probably using the changeWorkitem openflow 
API) and the process instance is ready to be resumed. 

Question is: where is the process to be resumed from? This choice can be the 
most general, possibly bringing the instance to change activity or even 
process to be run! So what happens is a fallin phase:

 - Someone chooses a process and activity for the workitem to be resumed in 
(calling fallinWorkitem openflow API). And this can be made multiple times, 
since you might want to resume the process having some parallel flow going on.

 - When you are satisfied with the workitem/s you resumed in (any) flow you 
close down this fallin phase using the endFallinWorkitem API.

I hope I shed some light on this matter. Comments and opinions are welcome on 
how to handle this (keep in mind that this is exception: anything can happen 
and anything can be made to fix it).


Cheers,
	Daniele =)


On Wednesday 02 April 2003 10:40, Roberto Borgotallo wrote:
> Hi all
>
> I recently tried to use the feature "end fallout" from
> ZPT (manage) interface and I've discovered that it
> calls the workitem function endFallin ( name
> inconsistency ? ) .
> This function simply changes the workitem status
> attribute, set forwarded to 1 but DOES NOT forward !
>
> Here is the function extracted from workitem.py:
>
>     def endFallin(self):
>         self.setStatus('complete')
>         self.forwarded=1
>         self.reindex_object()
>
> As a result the flow result to be broken ( workitem on
> fallowing activities are not created)
>
> Because I inteded the endFallout ( this is the right
> name I suppose ) as I mean to say to Openflow: I've
> made all to be OK on my own (saying offline), act as
> everything for this workitem has gone in the right
> way,
>
> I think this is an error, let me know
>
> Good work to everybody
>
> Roberto
>
> ______________________________________________________________________
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-- 
Daniele Tarini - Research & Development - Icube S.r.l.
Address:        Via Ridolfi 15 - 56124 Pisa (PI), Italy
E-mail: d.t...@ic...     Web:    http://www.icube.it
Phone:  (+39) 050 97 02 07      Fax:    (+39) 050 31 36 588

[Openflow-dev] endFallout doesn't forwards

[<bor...@ya...>]

Hi all

I recently tried to use the feature "end fallout" from
ZPT (manage) interface and I've discovered that it
calls the workitem function endFallin ( name
inconsistency ? ) . 
This function simply changes the workitem status
attribute, set forwarded to 1 but DOES NOT forward !

Here is the function extracted from workitem.py:

    def endFallin(self):
        self.setStatus('complete')
        self.forwarded=1
        self.reindex_object()

As a result the flow result to be broken ( workitem on
fallowing activities are not created)

Because I inteded the endFallout ( this is the right
name I suppose ) as I mean to say to Openflow: I've
made all to be OK on my own (saying offline), act as
everything for this workitem has gone in the right
way,

I think this is an error, let me know

Good work to everybody

Roberto

______________________________________________________________________
Yahoo! Cellulari: loghi, suonerie, picture message per il tuo telefonino
http://it.yahoo.com/mail_it/foot/?http://it.mobile.yahoo.com/index2002.html

[Openflow-dev] usersAssignableTo method fixed in cvs

[Daniele <d.t...@ic...>]

Dear OpenFlowers,

I recently found a bug in the usersAssignableTo openflow method causing all users to be returned. This has been fixed (including tests) and committed in cvs.

Daniele =) 


-- 
Daniele Tarini - Research & Development - Icube S.r.l.
Address:        Via Ridolfi 15 - 56124 Pisa (PI), Italy
E-mail: d.t...@ic...     Web:    http://www.icube.it
Phone:  (+39) 050 97 02 07      Fax:    (+39) 050 31 36 588

Re: [Openflow-dev] activity parameters in OpenFlow 1.06

[Daniele <d.t...@ic...>]

Hello,

activity parameters are not specified anymore in the activity settings. If you wish to be passing parameters include them in the code you use to trigger the application call. 

For example: the application is invoked from a user worklist when the user clicks on the href anchor. Include the parameters in the url call like in

<a href="" 
   tal:define="i_id workitem/instance_id;
               w_id workitem/id;
               base_url python:here.WorkFlow.getApplicationUrl(i_id, w_id);
               parameters string:parA=${parA}&parB=${parB}"
   tal:attributes="href string:${base_url}?${parameters}">
trigger
</a>

where workitem comes from an openflow catalog search. Clear enough?

	Daniele =)

On Monday 31 March 2003 08:40, Andrea Stelter wrote:
> Hi!
>
> In the OpenFlowIntroduction it is said, that parameters can come from two
> sources. In version 0.7 it's possible to add the application parameters to
> the application AND to the activity, but in version 1.06 I can't figure out
> the possibility to add the parameters as "activity paramteters". Where can
> I find it?
>
> Thanks, Andrea.

-- 
Daniele Tarini - Research & Development - Icube S.r.l.
Address:        Via Ridolfi 15 - 56124 Pisa (PI), Italy
E-mail: d.t...@ic...     Web:    http://www.icube.it
Phone:  (+39) 050 97 02 07      Fax:    (+39) 050 31 36 588

Re: [Openflow-dev] How to fill the application URL in Operflow

[Daniele <d.t...@ic...>]

Hello,

try having:
/openflow/sendmail， then
as the reference url to be called by the application. 

I guess OpenFlow needs to handle http://... urls since it might want to refer something anywhere instead of the current Zope (where OF is installed). Feature filed in the development "to do" list.

Daniele =)

On Monday 31 March 2003 07:24, heying wrote:
> I've downloaded and set up Open Flow. Then I made a test,first, I added an
> openflow, then add an application,which url refered:
> http://localhost:8080/openflow/sendmail， then added a process,which
> activity refers the above application. But when I active the process
> instance, an error listed as below:
 
> Site Error An error was encountered while publishing this resource. 
> 
> Error Type: KeyError Error Value: http:
> 
> ---------------------------------------------------------------------------
>-----
 
> Troubleshooting Suggestions
> 
> This resource may be trying to reference a nonexistent object or variable
> http:. The URL may be incorrect. The parameters passed to this resource may
> be incorrect. A resource that this resource relies on may be encountering
> an error. 
 
> 
> 
> What's wrong? Can anybody give me a help? Thanks.
> 
> Johnson
> 

-- 
Daniele Tarini - Research & Development - Icube S.r.l.
Address:        Via Ridolfi 15 - 56124 Pisa (PI), Italy
E-mail: d.t...@ic...     Web:    http://www.icube.it
Phone:  (+39) 050 97 02 07      Fax:    (+39) 050 31 36 588

[Openflow-dev] activity parameters in OpenFlow 1.06

[Andrea S. <And...@we...>]

Hi!

In the OpenFlowIntroduction it is said, that parameters can come from two sources. 
In version 0.7 it's possible to add the application parameters to the application AND to the activity, but in version 1.06 I can't figure out the possibility to add the parameters as "activity paramteters". Where can I find it?

Thanks, Andrea.

[Openflow-dev] How to fill the application URL in Operflow

[heying <wen...@21...>]

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IHVybCByZWZlcmVkOiBodHRwOi8vbG9jYWxob3N0OjgwODAvb3BlbmZsb3cvc2VuZG1haWyjrCB0
aGVuIGFkZGVkIGEgcHJvY2Vzcyx3aGljaCBhY3Rpdml0eSByZWZlcnMgdGhlIGFib3ZlIGFwcGxp
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IGEgaGVscD8gVGhhbmtzLg0KSm9obnNvbg0K

[Openflow-dev] How to fill the application URL in Operflow

[heying <wen...@21...>]

SSd2ZSBkb3dubG9hZGVkIGFuZCBzZXQgdXAgT3BlbiBGbG93LiBUaGVuIEkgbWFkZSBhIHRlc3Qs
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Ym9keSBnaXZlIG1lIGEgaGVscD8gVGhhbmtzLg0KDQpKb2huc29uDQoNCg==

[Openflow-dev] Help API

[Maurizio B. <Mb...@in...>]

Hy all,

2 questions:
1. How can I translate the "usersAssignedTo" API in OF 1.06 to discover the 
users "assigned" to a specify activity?
2. Generally: exists a complete API reference of OF 1.06 version?

thanks, Maurizio

Re: [Openflow-dev] Upgrade from OpenFlow0.7 to 1.06 question

[Daniele <d.t...@ic...>]

Hello,

I'm afraid the automatic upgrade is not available at the moment. Keep in mind that to move an openflow application from 0.7 to 1.0 you need to actually do two things:

1) change the openflow objects (the one you mentioned: activities, Transitions, Roles and Application)
2) change the actual application interface and python scripts so that they use the new API

While for issue number 1 I see the possibility that someone (or maybe me?) could come up with a OF07/OF10 importer, I'm afraid issue number 2 will have to be handled by the creator of the application (that is: you).

Cheers,
	Daniele =)

On Tuesday 25 March 2003 10:43, Maurizio Betti wrote:
> Hy all,
>
> It's possible in some automatic way to make upgrade from 0.7 to 1.06 OF
> version without rewriting activities, Transitions, Roles and Application?
> This question because I've developed a very complex workflow using 0.7
> version...
>
> thanks in advance, Maurizio Betti
>
>
>
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-- 
Daniele Tarini - Research & Development - Icube S.r.l.
Address:        Via Ridolfi 15 - 56124 Pisa (PI), Italy
E-mail: d.t...@ic...     Web:    http://www.icube.it
Phone:  (+39) 050 97 02 07      Fax:    (+39) 050 31 36 588

[Openflow-dev] Upgrade from OpenFlow0.7 to 1.06 question

[Maurizio B. <Mb...@in...>]

Hy all,

It's possible in some automatic way to make upgrade from 0.7 to 1.06 OF 
version without rewriting activities, Transitions, Roles and Application? 
This question because I've developed a very complex workflow using 0.7 
version...

thanks in advance, Maurizio Betti

[Openflow-dev] Re: Getting started with openflow

[Daniele <d.t...@ic...>]

Hello Thierry,

I know documentation is critical... but I'm afraid the closest thing we have to a "getting started" document is the OpenFlow introduction I expect you already found on the OpenFlow site:
http://www.openflow.it/Documentation/documentation/OpenFlowIntroduction

I think before the end of the week we'll manage to get an OpenFlow short usage demo on the download section of the OpenFlow site: stay tuned since I'll post the new on the openflow-dev list. If you still have to subscribe to the list I suggest you to do so from here:
http://lists.sourceforge.net/lists/listinfo/openflow-dev

Should you have any specific question please send an e-mail to the list: it's the place where you most probably will get an answer (from me and the other opeflowers).

Cheers,	
	Daniele =)

On Monday 17 March 2003 08:55, Thierry Vesin wrote:
> Good morning,
> I am interested in free workflow development, so I've doqwnloaded openflow.
> The problem is that there's no "Getting started" document (how to build a
> simple workflow, openflow rules and syntax, examples, ...). How could Iget
> these informations?
> Best Regards
> Thierry VESIN

-- 
Daniele Tarini - Research & Development - Icube S.r.l.
Address:        Via Ridolfi 15 - 56124 Pisa (PI), Italy
E-mail: d.t...@ic...     Web:    http://www.icube.it
Phone:  (+39) 050 97 02 07      Fax:    (+39) 050 31 36 588

[Openflow-dev] OpenFlow Editor 0.2

[Daniele <d.t...@ic...>]

Hello openflowers,

I posted OpenFlow Editor version 0.2. This versions draws the process map and 
the set roles for push and pull on the process activities.

I also posted an example gif file that OpenFlow Editor automatically 
generated out of a process.

Have fun,
	Daniele =)


-- 
Daniele Tarini - Research & Development - Icube S.r.l.
Address:        Via Ridolfi 15 - 56124 Pisa (PI), Italy
E-mail: d.t...@ic...     Web:    http://www.icube.it
Phone:  (+39) 050 97 02 07      Fax:    (+39) 050 31 36 588

[Openflow-dev] get the picture of your processes (first steps for an interactive html editor)

[Daniele <d.t...@ic...>]

Hello openflowers,

I posted OpenFlowEditor, a small product that will grow to be a fully 
interactive html editor for OpenFlow. Right now it renders your process maps 
as gif pictures (boxes for activities and arrows for transitions). 

The product needs graphviz installed (see http://www.graphviz.org) to work. 
Thanks a lot to Marco Bizzarri who found out the graphviz tool and had the 
idea on how to use it to show process maps.

The next step will be turning these gifs to clickable image maps! The editor 
is on its way =)

You can find it in the download section of the OpenFlow site:
http://www.openflow.it/EN/Download/index_html

The following url points directly to the product tgz file:
http://www.openflow.it/Download/OpenFlowEditor.tgz

Have fun with it,
        Daniele =)
-- 
Daniele Tarini - Research & Development - Icube S.r.l.
Address:        Via Ridolfi 15 - 56124 Pisa (PI), Italy
E-mail: d.t...@ic...     Web:    http://www.icube.it
Phone:  (+39) 050 97 02 07      Fax:    (+39) 050 31 36 588

[Openflow-dev] Monitor page

[Daniele <d.t...@ic...>]

Hello openflowers,

I posted a simple interface page that monitors workflow activities. It's a 
zexp you can import (and customize to your needs) to monitor wait and work 
time of each activity in your workflow.

You can find it in the download section of the OpenFlow site:
http://www.openflow.it/EN/Download/index_html

The following url points directly to the zexp to download:
http://www.openflow.it/Download/Monitor.zexp

Cheers,
	Daniele =)

-- 
Daniele Tarini - Research & Development - Icube S.r.l.
Address:        Via Ridolfi 15 - 56124 Pisa (PI), Italy
E-mail: d.t...@ic...     Web:    http://www.icube.it
Phone:  (+39) 050 97 02 07      Fax:    (+39) 050 31 36 588

Re: [Openflow-dev] Possibile OT: anybody knows other wf products?

[Francesco C. <cir...@ti...>]

Hi,

a good, yet closed source, wfms is Ultimus (http://www.ultimus.com).
Another I could study a bit is WebMerge Workflow
(http://www.fourthworld.com/products/webmerge/workflow.html);
there are really a loooot of wfms, and they are soooo different!!

In open source: wftk: Open-source workflow toolkit
(http://www.vivtek.com/wftk) and Chautauqua (written in python!)
(http://www.cs.colorado.edu/~carlosm/chautauqua.html)

But first of all I would compare Openflow to DCworkflow :-)

regards,
francesco (ilBestio)

On Saturday 08 March 2003 16:18, Maurizio Betti wrote:
> Hy,
>
> Sorry if this question is a bit of OT:
>
> I'm writing my degree thesis on a project developed on OpenFlow. But: n=
ow,
> I'm looking any wf products to do some benchmark between OpenFlow and t=
hese
> other.
>
> Do you know other workflow products (possibile in opensource area)?
>
> thanks in advance, Maurizio Betti

=2E.....................................................
Francesco Ciriaci @ Reflab
Cell. (+39) 333 4284675
http://www.reflab.it

[Openflow-dev] Possibile OT: anybody knows other wf products?

[Maurizio B. <mb...@in...>]

Hy,

Sorry if this question is a bit of OT:

I'm writing my degree thesis on a project developed on OpenFlow. But: now, 
I'm looking any wf products to do some benchmark between OpenFlow and these 
other.

Do you know other workflow products (possibile in opensource area)?

thanks in advance, Maurizio Betti

[Openflow-dev] Re: about openflow

[Daniele <d.t...@ic...>]

Hello,

the transtions condition is evaluated only when needed. That is when an 
activity has multiple outgoing transtions in XOR split mode.

Cheers,
  Daniele =)

On Tuesday 04 March 2003 13:01, you wrote:
> Hi!
> I am trying the openflow and reading the article
> OpenFlowIntroduction.
> I hope a demo be added for a quick start. Would you
> please send me a zexp of such demo? i am puzzled by
> setting the transition's condition. In my application
> the condition seems useless, the flow will go on even
> i set the condition to "python:0"
>
> Thanks
>
> _________________________________________________________
> Do You Yahoo!?
> "用雅虎搜索，找到关于奥斯卡的一切"
> http://cn.search.yahoo.com/search/cn?p=%b0%c2%cb%b9%bf%a8

-- 
Daniele Tarini - Research & Development - Icube S.r.l.
Address:        Via Ridolfi 15 - 56124 Pisa (PI), Italy
E-mail: d.t...@ic...     Web:    http://www.icube.it
Phone:  (+39) 050 97 02 07      Fax:    (+39) 050 31 36 588

Re: [Openflow-dev] Openflow 1.0.6

[Carrer Y. <yu...@al...>]

 Where can I find some examples of OF application? We could start to 
build a site with  them, to download and study! :)

[Openflow-dev] Openflow 1.0.6

[Daniele <d.t...@ic...>]

Dear openflowers,

I just released openflow version 1.0.6. You can find it at the openflow site 
at:

http://www.openflow.it/EN/index_html

Changes from version 1.0.5:

 - fixed openflow object copy/paste and import/export bug (Catalog doesn't 
get screwed up anymore)

 - fixed activity edit bug: activity subflow is now correctly updated

 - fixed permission bug causing an error in setting the "Use OpenFlow" 
permission on openflow object itself.

 - fixed workitem fallout (exception handling): you can now fallout workitem 
whether the status they have.

 - changed the permission protecting openflow usersAssignableTo to "Use 
OpenFlow"

 - implemented new openflow method: changeWorkitem. Allows changing workitem 
data; works when workitem is in exception state (ie 'fallout' status)

 - introduced 'blocked' status for workitem. status='blocked' can be used in 
catalog searches (so you don't have to check the 'blocked' attribute 
anymore). Workitem status is blocked when 'blocked' attribute is > 0.

 - introduced openflow, process, activity and workitem to TAL expression 
namespace for evaluatoing conditions (only had instance)


Openflow 1.0.6 should be compatible with other 1.0 versions. Thanks to all 
openflowers that contributed with their opinion and work. 

	Daniele =)


-- 
Daniele Tarini - Research & Development - Icube S.r.l.
Address:        Via Ridolfi 15 - 56124 Pisa (PI), Italy
E-mail: d.t...@ic...     Web:    http://www.icube.it
Phone:  (+39) 050 97 02 07      Fax:    (+39) 050 31 36 588

Re: [Openflow-dev] 2 small problems

[Daniele <d.t...@ic...>]

On Saturday 22 February 2003 18:07, 潘俊勇\(panjunyong\) wrote:
> Just 2 small problems in my view:
>
> 1. a small bug about catalog Index: the 'description' index should be
> TextIndex, but not FieldIndex.

Right

> 2. I found I can't re-assign a workitem if it already has a actor. In the
> following lines:
>
>     def assignWorkitem(self, instance_id, workitem_id, actor,
> REQUEST=None): .......
>         workitem_is_ok = instance.isActiveOrRunning() and not
> workitem.status == 'completed' and workitem.actor == '' if user_is_ok and
> workitem_is_ok:
>                 workitem.assignTo(actor)
>         if REQUEST: REQUEST.RESPONSE.redirect(REQUEST.HTTP_REFERER)
>
>   I think the workitem_is_ok should be:
>
>         workitem_is_ok = instance.isActiveOrRunning() and not
> workitem.status == 'completed'
>
>   This way, we can re-assign a workitem easily.
>
> Correct me if I am wrong. Thanks.

I guess this is almost right. "Almost" because there is a workaround: call 
unassignWorkitem before assignWorkitem if you want to re-make assignment. 
Anyway I also don't really see the reason not to let assignWorkitem do the 
assignment even though the workitem is already assigned.

Daniele =)

-- 
Daniele Tarini - Research & Development - Icube S.r.l.
Address:        Via Ridolfi 15 - 56124 Pisa (PI), Italy
E-mail: d.t...@ic...     Web:    http://www.icube.it
Phone:  (+39) 050 97 02 07      Fax:    (+39) 050 31 36 588