[rules-users] Error in Drools when clicking "Generate Task Form Template"

[Tihomir Surdilovic]

The issue seems to be your assignment mapping of the task data outputs. 
Please note the "To" and "From" columns in the data assignments editor:
** When you are mapping DATA INPUTS:
"From" columns should have the object you are mapping from, so like 
process variables, globals, etc
"To" columns should have the object you are mapping to, so the data 
input of your task

** When you are mapping DATA OUTPUTS:
"From" columns should have the object you are mapping from, so your data 
output of your Task
"To" columns should have the object you are mapping to, so like your 
process variables, globals, etc.

I think in your case you should just switch your assignments for your 
task data outputs, so:
** Task 1:
from Object="Approve" is mapped to "ApprovedRequest"
should be
from Object="ApprovedRequest" is mapped to "Approve"

** Task 2:
from Object="Order" is mapped to "OrderItem"
should be
from Object="OrderItem" is mapped to "Order"

Hope this helps.
Tihomir
On 8/7/12 10:06 AM, Saadi Ajam wrote:
> Thanks a lot for reply,
> Actually I was searching the internet and I found your post in 
> wordpress. And yes it was a variable or binding error. I removed all 
> the variables and the forms generated with the no data.
>
> So, Could you please give me some hints about the variables in Drools. 
> My whole process example is composed of 2 user tasks only:
>
>   * In the process properties under "*Variable Definition*", I add
>     "ItemID" = Integer and "ItemName" = String and "Approve"=Boolean
>     and "Order"=Boolean
>   * In the first task properties: under "*DataInputSet*", I add
>     "AddItemID"=Integer and "AddItemName"=String | Under
>     "*DataOutputSet"* I add "ApproveRequest"=Boolean
>       o Under assignments, From Object= "ItemID" is mapped to
>         "AddItemID", From Object="ItemName" is mapped to
>         "AddItemName", from Object="Approve" is mapped to
>         "ApprovedRequest"
>   * In the second task properties: under*"DataInputSet"*, I add
>     "OrderItemID"=Integet and "OrderItemName"=String | Inder
>     *"DataOutputSet"* I add "OrderItem"=Boolean
>       o Under assignments, From Object= "ItemID" is mapped to
>         "OrderItemID", From Object="ItemName" is mapped to
>         "OrderItemName", from Object="Order" is mapped to "OrderItem"
>
> Thanks,
>
>
>
> On Tue, Aug 7, 2012 at 4:44 PM, Tihomir Surdilovic 
> <tsurdilo at redhat.com <mailto:tsurdilo at redhat.com>> wrote:
>
>     Task Form generation parses your process BPMN2 and it looks as you
>     have
>     some issues with it - click on the "BPMN2" button in the Designer
>     footer
>     and then either provide the BPMN2 shown, or the server log error(s) it
>     generates. If you get errors, provide those, and also click on the
>     "JSON" button in the footer and provide the JSON representation of
>     your
>     process.
>
>     You can click on the "info" button in the Designer header to
>     provide the
>     Designer version you are using...that will help as well
>
>     Thanks.
>     Tihomir
>     On 8/7/12 9:02 AM, Sadiroveski wrote:
>     > Dear helpers,
>     >
>     > I designed process in drools with human tasks included, add the
>     variables,
>     > inputsets and bindings.
>     > When I clicked on the "Generate Task Form Templates", to add
>     forms I got the
>     > following:
>     >
>     >
>     ----------------------------------------------------------------------------------------
>     > type Exception report
>     >
>     > message
>     >
>     > description The server encountered an internal error () that
>     prevented it
>     > from fulfilling this request.
>     >
>     > exception
>     >
>     > java.lang.ArrayIndexOutOfBoundsException: 1
>     >
>     >
>     org.jbpm.designer.bpmn2.impl.Bpmn2JsonUnmarshaller.applyTaskProperties(Bpmn2JsonUnmarshaller.java:3482)
>     >
>     >
>     org.jbpm.designer.bpmn2.impl.Bpmn2JsonUnmarshaller.applyProperties(Bpmn2JsonUnmarshaller.java:1921)
>     >
>     >
>     org.jbpm.designer.bpmn2.impl.Bpmn2JsonUnmarshaller.unmarshallItem(Bpmn2JsonUnmarshaller.java:1645)
>     >
>     >
>     org.jbpm.designer.bpmn2.impl.Bpmn2JsonUnmarshaller.unmarshallItem(Bpmn2JsonUnmarshaller.java:1560)
>     >
>     >
>     org.jbpm.designer.bpmn2.impl.Bpmn2JsonUnmarshaller.unmarshall(Bpmn2JsonUnmarshaller.java:225)
>     >
>     >
>     org.jbpm.designer.bpmn2.impl.Bpmn2JsonUnmarshaller.unmarshall(Bpmn2JsonUnmarshaller.java:201)
>     >
>     >
>     org.jbpm.designer.web.server.TaskFormsServlet.doPost(TaskFormsServlet.java:73)
>     > javax.servlet.http.HttpServlet.service(HttpServlet.java:754)
>     > javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
>     >
>     >
>     org.jbpm.designer.web.filter.impl.PluggableFilter.doFilter(PluggableFilter.java:70)
>     >
>     > note The full stack trace of the root cause is available in the
>     JBoss
>     > Web/7.0.1.Final logs.
>     >
>     -------------------------------------------------------------------------------------------
>     >
>     >
>     > Any help please,
>     >
>     >
>     >
>     > --
>     > View this message in context:
>     http://drools.46999.n3.nabble.com/Error-in-Drools-when-clicking-Generate-Task-Form-Template-tp4019040.html
>     > Sent from the Drools: User forum mailing list archive at Nabble.com.
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