Syntax for retrieving data from a task container

Question

Hello Workflow Fans !
I have a Task with the following configuration:
BASIC DATA - Object Method :
Object Category: BOR Object Type
Object Type: ZBusObj1
Method: 022_Data_Upd
CONTAINER :
I have added a second BOR Object in the container called ZBusObj2
In conclusion, when the task is executed within my WF run, the method ZBusObj1.022_Data_Upd is executed and both business objects (ZBusObj1 and ZBusObj2) should be available in my Task container.
My question:
How, in my method 022_Data_Upd, can I retreive (get) the value of the ZBusObj2 key field (Customer No)?
Here is what I tried... obviously... without any success:
BEGIN_METHOD O22_Data_Upd CHANGING CONTAINER.
  break-point.
* Variable declarations
  DATA: lva_Risk_Cat    TYPE ZTCOMP_PDV-CTLPC.
  DATA: lva_Montant_V TYPE ZTCOMP_PDV-MONTANT_V.
  DATA: lva_Custno       TYPE KNA1-KUNNR.
* Data retreival from the task container 
  SWC_GET_PROPERTY self 'RiskCategory' lva_Risk_Cat.
  SWC_GET_PROPERTY self 'MONTANT_V'    lva_Montant_V.
  SWC_GET_ELEMENT container 'ZBUSOBJ2.Customerno' lva_Custno.
The last line (SWC_GET_ELEMENT...) is the one I'm strugling with...
Any help will be appreciated.
Thanks in advance.
José

Answer 1

So, my understading is that you need an instance of the second object OBJ2 inside the method of the first object OBJ1.
First, if you only need the customer number, I recommend that you only pass the number itself. Here is what you need to do:
1- Add an "Import" parameter to method 022_DATA_UPD and call it anything (I'll use PARAM): the parameter can be either an object or a field. You specify the type when you define the parameter. Parameters are added by "single" clicking the method name in SWO1 so that the pointer is on the method name then clicking the "Parameters" button.
2- Inside the method, add the following code
Case 1: parameter is an object
DATA: lvo_custobj  TYPE swc_object.
DATA: lva_custno TYPE KNA1-KUNNR.
swc_get_element container 'PARAM' lvo_custobj.
swc_get_property lvo_custobj '<CUSTOMER_NUMBER_PROPERTY_NAME>' customer_number.
Case 2: parameter is just a field
DATA: lva_custno TYPE KNA1-KUNNR.
swc_get_element container 'PARAM' lva_custno.
As you can see, adding only the customer number is easier to read. The method should work when you test it in SWO1 before you proceed into the next steps.
3- Make sure the standard task calling the method is updated with the new parameter. Basically open the task in change mode and type an extra space in the description field then hit Enter. The system will ask you if you want to update the list of parameters.
4- Update the binding of the task in the workflow template to pass either the customer object or customer number.