03-s4-read-request.md

Create a read request to SAP S/4HANA

Let's write some code! The application is supposed to show appointments from three different sources, one of those being SAP S/4HANA. Implement the data retrieval as described in the following.

Implement the read request

Find the TODO in the readS4AppointmentsByPerson function in src/read-appointments.ts. Instead of returning an empty array, implement a request to retrieve timesheet entries from SAP S/4HANA. You can try to implement this on your own using the following hints or peek at the solution and copy the implementation.

Use the timeSheetEntryApi.requestBuilder() to create a request to get all TimeSheetEntries. Create the request by using the predefined variables and the following filters:

• timeSheetEntryApi.schema..PERSON_WORK_AGREEMENT_EXTERNAL_ID should equal personId
• timeSheetEntryApi.schema..TIME_SHEET_DATE should be greater or equal to from
• timeSheetEntryApi.schema..TIME_SHEET_DATE should be less or equal to to

Execute this request against the destination by setting the destinationName to S4HANA.

Reload your application in the browser and check, whether there are new appointments.

Where is the data coming from?

Go back to the .env file. It is used to set the destinations environment variable, that provides technical information on remote systems we want to connect to (SAP S/4HANA and SAP SuccessFactors in our case).

One of the destinations described here, has the name S4HANA. By executing your request and passing a destinationName you are implicitly using the technical information from the environment variable. If you want to find out more about the destination concept have a look at our documentation.

Next step: Create a write request to SAP S/4HANA