1、需求

BAPI_ACC_DOCUMENT_POST函式中沒有“憑證行專案付款原因程式碼”欄位的引數，
現需要將此欄位傳入BAPI中

2、實現方法

2.1、程式實現

建立結構，包含需要傳入的欄位

DATA: ls_extension2 TYPE bapiparex.
DATA: lt_extension2 LIKE TABLE OF ls_extension2.
DATA: ls_extension_field TYPE zds_acc_document_extension2.

CLEAR lt_extension2[].

CLEAR ls_extension_field.
ls_extension_field-posnr = ‘0000000001’. " 憑證行專案
ls_extension_field-rstgr = ‘1ZZ’. " 原因程式碼

CLEAR ls_extension2.
ls_extension2-structure = ‘ZDS_ACC_DOCUMENT_EXTENSION2’.
ls_extension2-valuepart1 = ls_extension_field.

2.2、增強實現

BADI增強：ACC_DOCUMENT


METHOD if_ex_acc_document~change .
DATA: wa_extension TYPE bapiparex,
ext_value(960) TYPE c,
wa_accit TYPE accit,
l_ref TYPE REF TO data.

FIELD-SYMBOLS: <l_struc> TYPE ANY,
<l_field> TYPE ANY.

SORT c_extension2 BY structure.

LOOP AT c_extension2 INTO wa_extension.
AT NEW structure.
CREATE DATA l_ref TYPE (wa_extension-structure).
ASSIGN l_ref->* TO <l_struc>.
ENDAT.
CONCATENATE wa_extension-valuepart1 wa_extension-valuepart2
wa_extension-valuepart3 wa_extension-valuepart4
INTO ext_value.
MOVE ext_value TO <l_struc>.
ASSIGN COMPONENT ‘POSNR’ OF STRUCTURE <l_struc> TO <l_field>.
READ TABLE c_accit WITH KEY posnr = <l_field>
INTO wa_accit.
IF sy-subrc IS INITIAL.
MOVE-CORRESPONDING <l_struc> TO wa_accit.
MODIFY c_accit FROM wa_accit INDEX sy-tabix.
ENDIF.
ENDLOOP.

ENDMETHOD.

METHOD if_ex_acc_document~change.

• Example to move fields from BAPI parameter EXTENSION2 to structure *
• ACCIT (accounting document line items). *
• The dictionary structure (content for EXTENSION2-STRUCTURE) must *
• contain field POSNR, (TYPE POSNR_ACC) to indentify the correct line *
• item of the internal table ACCIT. *

• 本地變數
  DATA: wa_extension TYPE bapiparex,
  ext_value(960) TYPE c,
  wa_accit TYPE accit,
  wa_accit_temp TYPE accit,
  l_ref TYPE REF TO data.

  DATA: lt_ddic_field TYPE STANDARD TABLE OF dfies,
  ls_ddic_field TYPE dfies.

• 指標變數
  FIELD-SYMBOLS: <l_struc> TYPE any,
  <l_field> TYPE any.

  FIELD-SYMBOLS: <fv_value_extend> TYPE any,
  <fv_value_orginal> TYPE any.

• 邏輯控制
  DATA l_type TYPE c.

  PERFORM frm_get_type IN PROGRAM zzljyfien_0001 IF FOUND
  USING ‘ZZLJYFIEN_0001’
  CHANGING l_type.
  CHECK l_type = ‘S’.

• 取增強結構欄位
  CALL FUNCTION ‘DDIF_FIELDINFO_GET’
  EXPORTING
  tabname = ‘ZSJYFI_0003’
  TABLES
  dfies_tab = lt_ddic_field.

  SORT c_extension2 BY structure.

  LOOP AT c_extension2 INTO wa_extension.
  AT NEW structure.
  CREATE DATA l_ref TYPE (wa_extension-structure).
  ASSIGN l_ref->* TO <l_struc>.
  ENDAT.

  CHECK wa_extension-structure EQ 'ZSJYFI_0003'.
  

•  CONCATENATE WA_EXTENSION-VALUEPART1 WA_EXTENSION-VALUEPART2
  

•  WA_EXTENSION-VALUEPART3 WA_EXTENSION-VALUEPART4
  

•  INTO EXT_VALUE.
  

*beign add by yangq on 2018-10-23
ext_value+0(240) = wa_extension-valuepart1.
ext_value+240(240) = wa_extension-valuepart2.
ext_value+480(240) = wa_extension-valuepart3.
ext_value+720(240) = wa_extension-valuepart4.
*end add by yangq on 2018-10-23

  MOVE ext_value TO <l_struc>.
  ASSIGN COMPONENT 'POSNR' OF STRUCTURE <l_struc> TO <l_field>.
  READ TABLE c_accit WITH KEY posnr = <l_field>
  INTO wa_accit.
  IF sy-subrc IS INITIAL.
    LOOP AT lt_ddic_field INTO ls_ddic_field.

•    assign component ls_comp-name of structure <l_struc> to <fv_value_extend>.
      ASSIGN COMPONENT ls_ddic_field-fieldname OF STRUCTURE <l_struc> TO <fv_value_extend>.
      IF sy-subrc = 0.
        ASSIGN COMPONENT ls_ddic_field-fieldname OF STRUCTURE wa_accit TO <fv_value_orginal>.
        IF sy-subrc = 0.
          IF <fv_value_extend> IS INITIAL.          " ExtensionIn中的值為初始值時, 不去賦值
            " do nothing...
          ELSE.
            <fv_value_orginal> = <fv_value_extend>. " 只有當 extensionin結構中有值時, 才去賦值
          ENDIF.
        ENDIF.
      ENDIF.
    ENDLOOP.
  

• 檢查並賦值
  CLEAR:wa_accit_temp.
  READ TABLE c_accit INTO wa_accit_temp INDEX sy-tabix.
  IF sy-subrc EQ 0.
  IF wa_accit-bschl IS INITIAL.
  wa_accit-bschl = wa_accit_temp-bschl.
  ENDIF.
  IF wa_accit-umskz IS INITIAL.
  wa_accit-umskz = wa_accit_temp-umskz.
  ENDIF.
  ** being add by yanqq on 2018-10-23

•      IF wa_accit-zz_item10 IS INITIAL.
  

•        wa_accit-zz_item10 = wa_accit_temp-zz_item10.
  

•      ENDIF.
  

•      IF wa_accit-zz_item13 IS INITIAL.
  

•        wa_accit-zz_item13 = wa_accit_temp-zz_item13.
  

•      ENDIF.
  

•      IF wa_accit-zz_item14 IS INITIAL.
  

•        wa_accit-zz_item14 = wa_accit_temp-zz_item14.
  

•      ENDIF.
  

•      IF wa_accit-zz_item15 IS INITIAL.
  

•        wa_accit-zz_item15 = wa_accit_temp-zz_item15.
  

•      ENDIF.
  

** end add by yanqq on 2018-10-23
*
ENDIF.
MODIFY c_accit FROM wa_accit INDEX sy-tabix.
ENDIF.
ENDLOOP.
ENDMETHOD.

有時候在擴充套件裡邊增加是不可以的，所以要在增強裡寫程式碼。