Implement BADI MB_MIGO_BADI to make check on purcahse order items

Question

Hello,
I would like to add some check and display corresponding messages in transaction MIGO on items.
I found the MB_MIGO_BADI and especially method CHECK_ITEM that seems to match this requirement.
The problem is that there is no data about PO in that method, just the selected ITEM row ID + an error structure to return messages.
When I look at the exemple class CL_EXM_IM_MB_MIGO_BADI there is a global atribute GT_EXTDATA that seems to handle this.
But when I do "Implementation --> Create" from the BADI screen, GT_EXTDATA does not exits.
I dont know how to get it or what to do in order to add it ?
Thank for your help,
Regards

Answer 1

Hello Morgan
Looking through the standard sample implementations of this BAdI on our ERP 6.0 system it seems to me that you select the item data within method HOLD_DATA_LOAD.
The class you mentioned is not a particular good example but even here my assumptions seems to be correct.
Within class CL_IM_OIH_MIGO_BADI the coding looks like this:
METHOD if_ex_mb_migo_badi~hold_data_load .
*------- Local data definition
  DATA: ls_goitem_tdp TYPE oih_s_goitem_tdp,
        ls_migo_htdp   TYPE oih_migo_htdp,
        lt_migo_htdp   TYPE STANDARD TABLE OF oih_migo_htdp.
*------- Select stored data ----------------------------------
* items
  SELECT *
    INTO TABLE lt_migo_htdp
    FROM oih_migo_htdp
    WHERE guid = i_guid.
*------- build members -----------------------------------------
*------- items
  CLEAR mt_goitem_tdp.
  LOOP AT lt_migo_htdp INTO ls_migo_htdp.
*------- mt_goitem_tdp
*   move field from hold QCI structure
    CLEAR ls_goitem_tdp.
    MOVE-CORRESPONDING ls_migo_htdp TO ls_goitem_tdp.
*   append line
    INSERT ls_goitem_tdp INTO TABLE mt_goitem_tdp.  " <<< static private attribute of impl. class
  ENDLOOP.
ENDMETHOD.
Thus, depending on the kind of MIGO execution you need to load the appropriate item data into a (static) attribute of your BAdI implementing class. The header details you should get within method STATUS_AND_HEADER.
Regards
  Uwe