How to Fill a non Singleton Subnode with ABAP

[former_member801447]

Hello Experts,

my Problem is to fill a non Singlton Subnode.

I have a Node called Subject with some Attribute plus a Subnode called Details

Details is a non Singleton node (Singletonbox is unselected).

The node Subject is filled with n Elements.

Then i try to fill the Subnode Details:

I get the number of Elements from Node Subject:

nodelength = node_subject->get_element_count( ).

then a move to the very first element:

node_subject->move_first( ).

then i do a loop

DO nodelength TIMES.

then i get the id of the selected element

node_subject->get_attribute ( EXPORTING name = 'ID' IMPORTING value = subjectid ).

then i search for the elements in a table

select * from detailstab into table tmpdetailstab where ID = subjectid.

the next step is, to bind the result table (possible n elements) to the node details

node_details->bind_table( NEW_ITEMS = tmpdetailstab SET_INITIAL_ELEMENTS = abap_false).

then i make a step to the next elements in subject

node_subject->move_next( ).

and the loop is at the end

ENDDO.

The code runs, butt the result is not equals to my forecast.

There is only a filled subnode Details in the first element of Subject. If i set the lead_selection for Subnode Details in the second element of Subject, i get the error "Invalid Index 1 when Setting the Lead Selection."

Have somebody an idea what's going wrong?

Stephan Borchert

[former_member215843]

Hi Stephan,

Your code doesn't work, because you have to get a reference to the subnode inside the loop.

There are some disadvantages in this coding:

- The lead selection is changed each time you run through the loop. This may be bad for performance, because the framework changes a lot for each lead selection change.

- The coding is not very short.

You can change it in different ways:

- Just define a supply function for the subnode. There you get the parent element, where you can read the 'ID', and have the reference to the node you want to fill. Anothere advantage is that the subnode is only filled for those nodes, which are really used. It does not matter whether this is a singleton node or not.

- Another possibility is to fetch a list of elements from the node (IF_WD_CONTEXT_NODE=>GET_ELEMENTS( )), then run through these elements, read the attribute, get a reference to the subnode and fill it.

Ciao, Regina

[former_member801447]

Hi Regina,

i'm a newbee in ABAP. So i will try your tips it next week.

Thank you very much

[Former Member]

Hi Stephan.

You can loop over all elements of your subject node and retreive the child node

details of each elemnt to bind your selection result like this:

DATA:
        lr_node_subject  TYPE REF TO if_wd_context_node,
        lr_subject_element       TYPE REF TO if_wd_context_element,
        lr_node_details  TYPE REF TO if_wd_context_node.

  DATA:
        lt_elements           TYPE wdr_context_element_set.

        lt_elements = lr_node_subject->get_elements( ).

loop at lt_elements into lr_subject_element.
     lr_node_details = lr_subject_element->get_child_node( 'DETAILS' ).
     lr_node_details->bind_table( <your_selection_result> ).
endloop.

Hope this helps a bit.

PS: Maybe you just forgot to get the reference to the details node of current subject node in your loop.

Cheers,

Sascha

Message was edited by:

Sascha Dingeldey

[former_member801447]

Thanks Sascha,

your PS gave the hint, to solve my problem.

Stephan

[Former Member]

Hi Stephan.

You should consider Reginas statements regarding the performance.

The best way would be to change to the get_elements( ) solution.

Cheers,

Sascha