Odata – Complex operations with multilevel expanded entityset and Multiple entries using batch

In this blog post, You will learn about different complex operations in Odata.

Lets start with a basic operation.

SAP Back-End Developer – ABAP Cloud Certification Preparation Guide

Get entity set

Create a SE11 structure

Go to SEGW

Click the data mode – > Import -> DDIC structure

Fill the necessary fields in the next screen in the wizard

In the runtime artifacts, go to DPC_EXT class

In the Inherited method,

Choose the required method (*GET_ENTITYSET) and redefine

Sample URL with filter

/sap/opu/odata/sap/<Technical service name>/<ENTITY SET>?&$filter=Land1 eq’ZA’

Below is the sample code for get entity set with filter

IF line_exists( it_filter_select_options[ property = 'Land1' ] ).
DATA(lr_range) = it_filter_select_options[ property = 'Land1' ]-select_options.
ENDIF.

SELECT a~taxtype,
b~text
FROM tfktaxnumtype_c AS a
LEFT OUTER JOIN tfktaxnumtype_t AS b
ON a~taxtype EQ b~taxtype
AND b~spras EQ @sy-langu
INTO CORRESPONDING FIELDS OF TABLE @et_entityset
WHERE a~taxtype IN @lr_range.

Create DEEP entity

Example: 1 parent row and multiple child rows

Create parent

Create child entity

Create association

Create navigation from parent entity

For easy reference, give same name for navigation and ABAP fieldname

Now redefine /IWBEP/IF_MGW_APPL_SRV_RUNTIME~CREATE_DEEP_ENTITY method in DPC_EXT

And use the below code to extract data

io_data_provider->read_entry_data( IMPORTING es_data = ls_supplier_data ).

Nested structure should be in below format

Structure of ls_supplier_data

types:
BEGIN OF  ty_s_supplier .
INCLUDE TYPE zcl***mpc=>ts_vendorcreate.
TYPES: tax TYPE STANDARD TABLE OF zcl***mpc=>ts_tax WITH KEY taxtype.
TYPES: attachments_v TYPE STANDARD TABLE OF zcl***mpc=>ts_attachments_v WITH KEY usmd_title,
END OF ty_s_supplier.

Testing

Before testing, first implement /IWBEP/IF_MGW_APPL_SRV_RUNTIME~GET_EXPANDED_ENTITY.

Just write one line code like this.

URL

/sap/opu/odata/sap/<TECHNICAL SERVICE NAME>/VENDORCREATESet(‘1234’)?$expand=VENDOR_TAX,VENDOR_ATTACHMENTS_V

Execute

Fill er_entity in debugger to get the payload structure

Now click use as request

Now choose post

Change URI

Execute

Now create deep entity will be called

Get Expanded Entity

Follow the same steps as create deep.

URL

/sap/opu/odata/sap/<TECHNICAL SERVICE NAME>/VENDORCREATESet(‘1234’)?$expand=VENDOR_TAX,VENDOR_ATTACHMENTS_V

Redefine the below method

/IWBEP/IF_MGW_APPL_SRV_RUNTIME~GET_EXPANDED_ENTITY.

Fill the entries in exporting parameter er_entity

Get multilevel deep entity

Create different entities separately

And bind them together by navigation at each level like above

Redefine /IWBEP/IF_MGW_APPL_SRV_RUNTIME~GET_EXPANDED_ENTITYSET

In this method, fill the nested structure ty_s_tree

declare it like below

types:
    BEGIN OF ty_s_l4_tree.
        INCLUDE TYPE zcl_zmdg_mm_creq_prodh_mpc=>ts_l4_tree.
    TYPES: l4_l5 TYPE STANDARD TABLE OF zcl_zmdg_mm_creq_prodh_mpc=>ts_l5_tree WITH DEFAULT KEY,
      END OF ty_s_l4_tree .
  types:
    BEGIN OF ty_s_l3_tree.
        INCLUDE TYPE zcl_zmdg_mm_creq_prodh_mpc=>ts_l3_tree.
    TYPES: l3_l4 TYPE STANDARD TABLE OF ty_s_l4_tree WITH DEFAULT KEY,
      END OF ty_s_l3_tree .
  types:
    BEGIN OF ty_s_l2_tree.
        INCLUDE TYPE zcl_zmdg_mm_creq_prodh_mpc=>ts_l2_tree.
    TYPES: l2_l3 TYPE STANDARD TABLE OF ty_s_l3_tree WITH DEFAULT KEY,
      END OF ty_s_l2_tree .
  types:
    BEGIN OF ty_s_tree.
        INCLUDE TYPE zcl_zmdg_mm_creq_prodh_mpc=>ts_l1_tree.
    TYPES: l1_l2 TYPE STANDARD TABLE OF ty_s_l2_tree WITH DEFAULT KEY,
      END OF ty_s_tree.

Testing:

URL

Choose the first entityset and in expand, give the navigation

/sap/opu/odata/sap/<TECHNICAL SERVICE NAME>/L1_TREESet?$expand=L1_L2/L2_L3/L3_L4/L4_L5&$format=json

Batch Update for table – Multiple entries

Redefine the below methods

/IWBEP/IF_MGW_APPL_SRV_RUNTIME~CHANGESET_BEGIN

METHOD /iwbep/if_mgw_appl_srv_runtime~changeset_begin.
cv_defer_mode = abap_true.

ENDMETHOD.

/IWBEP/IF_MGW_APPL_SRV_RUNTIME~CHANGESET_END

Just implement it, nothing to write.

/IWBEP/IF_MGW_APPL_SRV_RUNTIME~CHANGESET_PROCESS

METHOD /iwbep/if_mgw_appl_srv_runtime~changeset_process.

LOOP AT it_changeset_request INTO DATA(ls_request) WHERE operation_type = 'CE'.
lo_create_context ?= ls_request-request_context.
lv_entity_type = lo_create_context->get_entity_type_name( ).
IF lv_entity_type = 'CREATE_PRODH'.
ls_request-entry_provider->read_entry_data( IMPORTING es_data = ls_data ).
IF ls_data IS NOT INITIAL.
*

Required logic

*

copy_data_to_ref(
EXPORTING
is_data = ls_data
CHANGING
cr_data = ls_changeset_response-entity_data ).
ls_changeset_response-operation_no = ls_request-operation_no.
INSERT ls_changeset_response INTO TABLE ct_changeset_response.

ENDIF.
ELSE.
* entity alredy exists - $batch will be rolled back

ls_message-msgty = 'E'.
ls_message-msgid = 'ZMDG_MM_LEAN'.
ls_message-msgno = '001'.
ls_message-msgv1 = ls_data-prodh.
me->/iwbep/if_mgw_conv_srv_runtime~get_message_container( )->add_message(
iv_msg_type = ls_message-msgty
iv_msg_id = ls_message-msgid
iv_msg_number = ls_message-msgno
iv_msg_v1 = ls_message-msgv1
iv_msg_v2 = ls_message-msgv2
iv_msg_v3 = ls_message-msgv3
iv_msg_v4 = ls_message-msgv4
).
RAISE EXCEPTION TYPE /iwbep/cx_mgw_busi_exception
EXPORTING
message_container = me->/iwbep/if_mgw_conv_srv_runtime~get_message_container( ).

ENDIF.
ENDIF.
ENDIF.

ENDLOOP.

ENDMETHOD.

Testing

Give below URI

Click add uri option and choose $batch and automatically the HTTP method moves to post operation

and HTTP request is filled with default code.

Replace the code like below if there are multiple entries

NOTE: Each entry should have unique Changeset name like changeset1,changeset2 etc..

And be cautious about the unnecessary spaces and indentation.

--batch
Content-Type: multipart/mixed; boundary=changeset1

--changeset1
Content-Type: application/http
Content-Transfer-Encoding: binary

POST CREATE_PRODHSet HTTP/1.1
Content-Type: application/json

{
"Field1" : "30002",
"Field2" : "Value",
}

--changeset1--

--batch
Content-Type: multipart/mixed; boundary=changeset2

--changeset2
Content-Type: application/http
Content-Transfer-Encoding: binary

POST CREATE_PRODHSet HTTP/1.1
Content-Type: application/json

{
"Field1" : "30004",
"Field2" : "Value",
}

--changeset2--

--batch--

Now you must have learned about the tweaks required for most commonly performed operations in Odata.