In order to retrieve the complete updated addresses, you will add more requests to your batch request. The first set of requests will trigger the update, the second set will trigger the data retrieval. The retrieve requests are based on a number of requests using the GetByKeyRequestBuilder of BusinessPartnerAddress. Create a list of requests based on the given addressList using the key properties businessPartner and addressId for each address:
async updateAddreses(businessPartnerAddresses: BusinessPartnerAddress[]): Promise<BusinessPartnerAddress[]> {
const updateRequests = businessPartnerAddresses.map(address => BusinessPartnerAddress.requestBuilder().update(address));
const retrieveRequests = businessPartnerAddresses.map(address =>
BusinessPartnerAddress.requestBuilder().getByKey(address.businessPartner, address.addressId)
);
await batch(changeset(...updateRequests), ...retrieveRequests).execute({
url: 'https://my.s4hana.ondemand.com/'
});
//evaluation of response in next step.
}
You created a batch request, that executes a number of updates and retrievals. Note, that the change set will be executed first and the retrieve requests will be executed sequentially afterwards. The order of execution within the changeset is not defined.
What is left to do is to take the response from the retrieve set and return it. A batch request with the SAP Cloud SDK responds with a list of BatchResponse. The first element in this list will be the response to the changeset. The rest will be the responses for your retrieve requests. Assign those to a local variable and convert each of the ReadResonses to a BusinessPartnerAddress.
The response type of retrieval request is ReadResponse. ReadResonses can either be responses to a request built by a GetAllRequestBuilder or a GetByKeyRequestBuilder, therefore the transformation method as on the ReadResponse returns a list of objects. In our case each list has length 1, since we used a byKey request. A reduce() collects all addresses in the end:
import { ReadResponse } from '@sap-cloud-sdk/core';
async updateAddreses(businessPartnerAddresses: BusinessPartnerAddress[]): Promise<BusinessPartnerAddress[]> {
const updateRequests = businessPartnerAddresses.map(address => BusinessPartnerAddress.requestBuilder().update(address));
const retrieveRequests = businessPartnerAddresses.map(address =>
BusinessPartnerAddress.requestBuilder().getByKey(address.businessPartner, address.addressId)
);
const [updateChangesetResponse, ...retrieveResponses] = await batch(changeset(...updateRequests), ...retrieveRequests).execute({
url: 'https://my.s4hana.ondemand.com/'
});
return retrieveResponses.reduce((addresses, response: ReadResponse) => [...addresses, ...response.as(BusinessPartnerAddress)], []);
}
buildAddressList(body: any): BusinessPartnerAddress[] {
return body.map(address => BusinessPartnerAddress.builder().fromJson(address));
}
The syntax used to assign the retrieve responses to a variable is called rest pattern and is part of destructuring. It allows to assign all but the first response from the list of batch responses to a variable without slicing the array. It is equivalent to the older syntax: const retrieveResponses = await batch(...).slice(1);.
