SAP MDG · VALIDATION DERIVATION
How do I implement SAP MDG entity validation in CHECK_ENTITY using BAdI USMD_RULE_SERVICE?
Implement CHECK_ENTITY in IF_EX_USMD_RULE_SERVICE as a guarded, entity-specific validation: read application context, check the BP model, loop over IT_DATA with dynamic field access, append USMD_S_MESSAGE entries to ET_MESSAGE, and normalize messages if needed.
Implement CHECK_ENTITY in IF_EX_USMD_RULE_SERVICE as a guarded, entity-specific validation: read application context, check the BP model, loop over IT_DATA with dynamic field access, append USMD_S_MESSAGE entries to ET_MESSAGE, and normalize messages if needed.
Implement CHECK_ENTITY in IF_EX_USMD_RULE_SERVICE when you need entity-level MDG validations such as mandatory fields, format checks, or cross-entity consistency checks. The retrieved template shows the standard flow: read application context first, guard by model BP, process IT_DATA generically, build USMD_S_MESSAGE entries with MSGID, MSGNO, MSGTY, and FIELDNAME, then append them to ET_MESSAGE. If messages need harmonization, the sample calls ZCL_MDGBP_BP_VALIDATION=>ADJUST_MESSAGES before returning.
Process flow
- Open SE18 and inspect BAdI definition
USMD_RULE_SERVICE. - Create or change the implementation in SE19.
- Assign or create the implementing class that implements IF_EX_USMD_RULE_SERVICE.
- Implement CHECK_ENTITY with early guards for application context and model BP.
- Loop over IT_DATA and validate target fields dynamically using ASSIGN COMPONENT.
- Build
USMD_S_MESSAGEentries with MSGID, MSGNO, MSGTY, and FIELDNAME. - Append messages to ET_MESSAGE and optionally call ZCL_MDGBP_BP_VALIDATION=>ADJUST_MESSAGES.
- Activate the class, implementation, and dependent objects in the correct order.
Referenced tables
| Object | Purpose |
|---|---|
USMD_S_MESSAGE | Message structure used to return validation errors and warnings from CHECK_ENTITY. |
USMD_T_MESSAGE | Internal message table type used to collect validation messages before returning them in ET_MESSAGE. |
ILLUSTRATIVE ABAP SAMPLE
Generic CHECK_ENTITY validation template for SAP MDG BP
Source-adapted template from the retrieved CHECK_ENTITY example; replace SOME_MAND_FIELD, message class, and message number with your business-specific values.
1METHOD if_ex_usmd_rule_service~check_entity.
2 DATA: lo_app_context TYPE REF TO if_usmd_app_context,
3 lt_message TYPE usmd_t_message,
4 ls_message TYPE usmd_s_message,
5 lv_crtype TYPE usmd_crequest_type,
6 lv_crstep TYPE usmd_crequest_appstep,
7 lv_crid TYPE usmd_crequest.
8
9 FIELD-SYMBOLS: <ls_data> TYPE any,
10 <lv_value> TYPE any.
11
12 lo_app_context = cl_usmd_app_context=>get_context( ).
13 CHECK lo_app_context IS BOUND.
14 CHECK io_model->d_usmd_model = 'BP'.
15
16 lo_app_context->get_attributes(
17 IMPORTING
18 ev_crequest_type = lv_crtype
19 ev_crequest_step = lv_crstep
20 ev_crequest_id = lv_crid ).
21
22 CHECK it_data IS NOT INITIAL.
23
24 LOOP AT it_data ASSIGNING <ls_data>.
25 ASSIGN COMPONENT 'SOME_MAND_FIELD' OF STRUCTURE <ls_data> TO <lv_value>.
26 IF <lv_value> IS ASSIGNED AND <lv_value> IS INITIAL.
27 CLEAR ls_message.
28 ls_message-msgid = 'ZMDG_SUPPL'.
29 ls_message-msgno = '001'.
30 ls_message-msgty = 'E'.
31 ls_message-fieldname = 'SOME_MAND_FIELD'.
32 APPEND ls_message TO et_message.
33 ENDIF.
34 ENDLOOP.
35
36 IF et_message IS NOT INITIAL.
37 zcl_mdgbp_bp_validation=>adjust_messages(
38 EXPORTING
39 cr_number = lv_crid
40 CHANGING
41 ct_message = et_message ).
42 ENDIF.
43ENDMETHOD.The remaining configuration, implementation details, and testing guidance continue from this answer more…
Related questions and keywords
Alternative questions
- How do I write a CHECK_ENTITY validation for SAP MDG business partner data?
- How do I implement mandatory-field checks in IF_EX_USMD_RULE_SERVICE~CHECK_ENTITY?
- How do I add BP validation messages in SAP MDG without hard errors?
Possible questions
- How do I implement SAP MDG entity validation in CHECK_ENTITY using BAdI
USMD_RULE_SERVICE? - What is the standard pattern for CHECK_ENTITY in SAP MDG?
- Which messages and fields should I fill in
USMD_S_MESSAGE? - How do I activate and test a
USMD_RULE_SERVICEBAdI implementation? - How do I adapt a generic CHECK_ENTITY template for BP validations?