BOBF-案例一

1 案例概述

实现输入product的quantity，price后计算amount，验证product id是否为空。完成prodcut编辑后自动计算order total amount，以及计算create by，create on 等信息。

Data

ROOT(ORDER_ID, TOTAL_AMOUNT_VAL, TOTAL_AMOUNT_CUR, include admin structure)
- ITEM(PRODUCT_ID, AMOUNT_VAL, AMOUNT_CUR, QUANTITY_VAL, QUANTITY_UNI,PRICE_VAL, PRICE_CUR)

Determination

ROOT
DET_ADMIN_DATA (ROOT has Admin Data and related determination)
DET_ROOT_AM (call action CALC_TOTAL_AMOUNT)
ITEM
CALC_AMOUNT (after modify)

Validation

ITEM
VAL_BO_CONSISTENCY (validate product exist or not, if not, raise a warning message)

Action

ITEM
CALC_TOTAL_AMOUNT

2 Determination

ROOT

DET_ADMIN_DATA
用来记录create on，create by，changed on，changed by相关信息，这里不需要我们自己实现，技术也没达到，套用就行。
DET_ROOT_AM
在子节点ITEM编辑完成后，根据ITEM的AMOUNT计算ROOT节点TOTAL AMOUNT。调用Action CALC_TOTAL_AMOUNT实现。调用action一般采用如下方法，其中，iv_act_key表示所要调用的action key，it_key表示节点下每一条数据的key。
触发条件是在ROOT的子节点ITEM Create和Update ，After Modify，前提条件是

Determaination

    io_modify->do_action(
      EXPORTING
        iv_act_key    = ZIF_STE_ORDER_C=>SC_ACTION-ROOT-CALC_TOTAL_AMOUNT    " Action
        it_key        = it_key    " Key Table
*        is_parameters =
*      IMPORTING
*        eo_message    =     " Message Object
*        et_failed_key =     " Key Table
*        eo_change     =     " Interface of Change Object
*        et_data       =
    ).

ITEM

CALC_AMOUNT
触发条件是After Modify。
在输入ITEM相关数据后，根据输入的PRICE_VAL, QUANTITY_VAL计算AMOUNT_VAL并将结果绑定。难点在于获取输入数据以及绑定结果。具体操作如下：
io_read->retrieve是获取输入值，iv_node是当前node的key值，it_key表示当前节点下每一条数据key,iv_fill_data与et_data绑定使用表示填充值,et_data表示结果集，iv_before_image为true表示读取修改前的值
/scmtms/cl_mod_helper=>mod_update_single是将结果绑定到字段，is_data是要绑定的值，iv_node是当前node的key值，iv_key是每一行数据的key值，it_changed_fields是要被绑定值的key值。
对于绑定值有两种方法，注释掉的部分为方法二。

    DATA: lt_item TYPE zste_t_ord_item,
          ls_item TYPE zste_s_ord_item,
          lt_mod  TYPE /bobf/t_frw_modification,
          lr_item TYPE REF TO zste_s_ord_item.
    FIELD-SYMBOLS: <ls_mod> LIKE LINE OF lt_mod.

    WRITE: ls_item-product_id.
    io_read->retrieve(
      EXPORTING
        iv_node                 =  zif_ste_order_c=>sc_node-item   " Node Name
        it_key                  =  it_key   " Key Table
*        iv_before_image         = ABAP_FALSE    " Data Element for Domain BOOLE: TRUE (="X") and FALSE (=" ")
*        iv_fill_data            = ABAP_TRUE    " Data element for domain BOOLE: TRUE (='X') and FALSE (=' ')
*        it_requested_attributes =     " List of Names (e.g. Fieldnames)
      IMPORTING
*        eo_message              =     " Message Object
        et_data                 =   lt_item  " Data Return Structure
*        et_failed_key           =     " Key Table
*        et_node_cat             =     " Node Category Assignment
    ).

    LOOP AT lt_item INTO ls_item.
      ls_item-amount_val = ls_item-price_val * ls_item-quantity_val.
      ls_item-amount_cur = ls_item-price_cur.

      /scmtms/cl_mod_helper=>mod_update_single(
        EXPORTING
         is_data            =  ls_item
         iv_node            =  zif_ste_order_c=>sc_node-item  " Node
         iv_key             =  ls_item-key   " NodeID
         it_changed_fields  =  VALUE #( ( zif_ste_order_c=>sc_node_attribute-item-amount_val )
                                          ( zif_ste_order_c=>sc_node_attribute-item-amount_cur ) )  " List of Names (e.g. Fieldnames)
*          iv_autofill_fields = 'X'    " 'X' -> all not readonly fields will be determined
*          iv_bo_key          =     " Business Object
*        importing
*          es_mod             =     " Change
        CHANGING
          ct_mod             =  lt_mod   " Changes
      ).
    ENDLOOP.

*    LOOP AT lt_item INTO ls_item.
*      ls_item-amount_val = ls_item-price_val * ls_item-quantity_val.
*      ls_item-amount_cur = ls_item-price_cur.
*
*      APPEND INITIAL LINE TO lt_mod ASSIGNING <ls_mod>.
*      CREATE DATA lr_item.
*      lr_item->* = ls_item.
*      <ls_mod>-change_mode = /bobf/if_frw_c=>sc_modify_update.
*      <ls_mod>-association = zif_ste_order_c=>sc_association-root-item.
*      <ls_mod>-source_node = zif_ste_order_c=>sc_node-root.
*      <ls_mod>-node = zif_ste_order_c=>sc_node-item.
*      <ls_mod>-key = lr_item->key.
*      <ls_mod>-data = lr_item.
*    ENDLOOP.

    IF lt_mod IS NOT INITIAL.
      io_modify->do_modify( it_modification = lt_mod ).
    ENDIF.

3 Validation

ITEM

VAL_BO_CONSISTENCY
触发条件

image.png

image.png

验证ITEM输入是否存在PRODUCT ID。主要难点在于错误信息显示，实现如下
首先要在T-Code:se91种创建message，/scmtms/cl_msg_helper=>add_message用于显示提示信息

message management

DATA: ls_item TYPE zste_s_ord_item,
          lt_item TYPE zste_t_ord_item,
          lv_msg  TYPE string,
          ls_msg  TYPE symsg.
    CLEAR eo_message.

    io_read->retrieve(
      EXPORTING
        iv_node                 =  zif_ste_order_c=>sc_node-item  " Node Name
        it_key                  =   it_key  " Key Table
*        iv_before_image         = ABAP_FALSE    " Data Element for Domain BOOLE: TRUE (="X") and FALSE (=" ")
*        iv_fill_data            = ABAP_TRUE    " Data element for domain BOOLE: TRUE (='X') and FALSE (=' ')
*        it_requested_attributes =     " List of Names (e.g. Fieldnames)
      IMPORTING
*        eo_message              =     " Message Object
         et_data                 =   lt_item  " Data Return Structure
*        et_failed_key           =     " Key Table
*        et_node_cat             =     " Node Category Assignment
    ).

    LOOP AT lt_item INTO ls_item.
      IF ls_item-product_id IS INITIAL.
        MESSAGE e001(zste_order) INTO lv_msg.
        MOVE-CORRESPONDING sy TO ls_msg.
        /scmtms/cl_msg_helper=>add_message(
          EXPORTING
*          iv_bopf_location_key =     " Det/Val execution node instance key
            is_msg               =  ls_msg   " Structure of Message Variables
            iv_bo_key            =  is_ctx-bo_key   " Business Object
            iv_node              =  is_ctx-node_key   " Node Name
            iv_key               =  ls_item-key   " Key
            iv_attribute         =  zif_ste_order_c=>sc_node_attribute-item-product_id   " Field Name
            iv_detlevel          = /scmtms/cl_applog_helper=>sc_al_detlev_default    " Application Log: Level of detail
            iv_probclass         = /scmtms/cl_applog_helper=>sc_al_probclass_important    " Application log: Message problem class
*          iv_add_context_info  = ABAP_FALSE    " Generate BO instance specific message context
          CHANGING
            co_message           =   eo_message  " Interface of Message Object
        ).
        /scmtms/cl_common_helper=>insert_key(
          EXPORTING
            iv_key =  ls_item-key   " NodeID
*    is_key =     " Node Key
          CHANGING
            ct_key =   et_failed_key  " Key Table
        ).
      ENDIF.
    ENDLOOP.

4 Action