CX_SADL_DUMP_APPL_MODEL_ERROR while sending GET Request to ODATA v4 with /IWBEP/IF_V4_DP_BASIC

[OmkarVB]

Dear Community,

I am trying to create ODATA V4 as mentioned in SAP Note 2485370, So I created a custom entity in Eclipse and also a Class with below method implemented from interface /IWBEP/IF_V4_DP_BASIC. 

@EndUserText.label: 'ZSAMPLE_SERVICE'
@ObjectModel.query.implementedBy: 'ABAP:ZCL_SAMPLE_SERVICE'
define custom entity ZSAMPLE_SERVICE
{
   key component_material : abap.char(40);
       fg_material  : abap.char(40);
       fg_material_descr : abap.char(40);
  
}

And Class as below

CLASS ZCL_SAMPLE_SERVICE DEFINITION
  PUBLIC
  inheriting from /iwbep/cx_gateway
  FINAL
  CREATE PUBLIC .

  PUBLIC SECTION.

    INTERFACES /IWBEP/IF_V4_DP_BASIC.
  PROTECTED SECTION.
  PRIVATE SECTION.
ENDCLASS.



CLASS ZCL_SAMPLE_SERVICE IMPLEMENTATION.
  METHOD /IWBEP/IF_V4_DP_BASIC~CREATE_ENTITY.

  ENDMETHOD.

  METHOD /IWBEP/IF_V4_DP_BASIC~CREATE_REFERENCE.

  ENDMETHOD.

  METHOD /IWBEP/IF_V4_DP_BASIC~DELETE_ENTITY.

  ENDMETHOD.

  METHOD /IWBEP/IF_V4_DP_BASIC~EXECUTE_ACTION.

  ENDMETHOD.

  METHOD /IWBEP/IF_V4_DP_BASIC~EXECUTE_FUNCTION.

  ENDMETHOD.

  METHOD /IWBEP/IF_V4_DP_BASIC~READ_ENTITY.

    DATA: TS_DATA TYPE zsample_service.
    TS_DATA-COMPONENT_MATERIAL = '12333333'.
    TS_DATA-FG_MATERIAL = '321'.
    TS_DATA-FG_MATERIAL_DESCR = 'This is material description'.


    IO_RESPONSE->SET_BUSI_DATA( TS_DATA ).
  ENDMETHOD.

  METHOD /IWBEP/IF_V4_DP_BASIC~READ_ENTITY_LIST.
    DATA: TS_DATA TYPE zsample_service,
          TT_DATA TYPE TABLE OF zsample_service.
    TS_DATA-COMPONENT_MATERIAL = '12333333'.
    TS_DATA-FG_MATERIAL = '321'.
    TS_DATA-FG_MATERIAL_DESCR = 'This is material description'.
    APPEND TS_DATA TO TT_DATA.
    IO_RESPONSE->SET_BUSI_DATA( TT_DATA[] ).
  ENDMETHOD.

  METHOD /IWBEP/IF_V4_DP_BASIC~READ_REF_TARGET_KEY_DATA.

  ENDMETHOD.

  METHOD /IWBEP/IF_V4_DP_BASIC~READ_REF_TARGET_KEY_DATA_LIST.

  ENDMETHOD.

  METHOD /IWBEP/IF_V4_DP_BASIC~UPDATE_ENTITY.

  ENDMETHOD.

ENDCLASS.

After this, I created service definition to explose above cds entity and then service binding.

When I do Get request to my service URL from postman I am  getting dump saying as below

Error analysis                                                                                    |
|    The application has indicated exception "CX_SADL_DUMP_APPL_MODEL_ERROR" as the                |
|     reason for the                                                                               |
|    termination:                                                                                  |
|    Processing was aborted because of an application modeling error: See previous                 |
|    in exception chain.                                                                           |
|                                                                                                  |
|    The exception is related to the previous exception                                            |
|     "LCX_RAP_QUERY_PROV_BAD_IMPLMNT" that occurred in                                            |
|    program "CL_SADL_UNMANAGED_QUERY_ENGINECP", in line 6 of include                              |
|     "CL_SADL_UNMANAGED_QUERY_ENGINECM00J". The reason for this exception                         |
|    was:                                                                                          |
|    Error occurred during execution of query provider 'ZCL_SAMPLE_SERVICE'                        |
|                                                                                                  |
|    The exception is related to the previous exception                                            |
|     "CX_RAP_QUERY_PROV_CONSTRUCTION" that occurred in                                            |
|    program "CL_RAP_QUERY_PROVIDER_FACTORY=CP", in line 6 of include                              |
|     "CL_RAP_QUERY_PROVIDER_FACTORY=CM004". The reason for this exception                         |
|    was:                                                                                          |
|    Error during construction of the Unmanaged Query Provider for entity                          |
|    ZSAMPLE_SERVICE                                                                               |
|                                                                                                  |
|    The exception is related to the previous exception "CX_SY_CREATE_OBJECT_ERROR"                |
|     that occurred in                                                                             |
|    program "CL_RAP_QUERY_PROVIDER_FACTORY=CP", in line 3 of include                              |
|     "CL_RAP_QUERY_PROVIDER_FACTORY=CM004". The reason for this exception                         |
|    was:                                                                                          |
|    Could not create object; reference variable does not match specified class                    |
|    ZCL_SAMPLE_SERVICE.      

Can anyone help on this?

I appreciate your time and reply on this query.

Regards,

Omkar

[junwu]

your system s4 2020?

[OmkarVB]

System is S4 2022,(Private Cloud)