REST API POST Response after multiple objects are created?

Question

I'm creating tasks with various properties and I'm passing the JSON data from Angular frontend to Java based backend. Assignee is a property of the Task class at the moment. A new request came in to change the behavior: The user should be able to select multiple assignees upon creating a new task.

The way I want to handle this is that I want to create the same amount of tasks as the number of assignees passed. So if n users are passed with the various task data, n tasks would be created in the DB for each user as an assignee.

Previously I could only pass one assignee and the code for returning the POST request's response was the following:

@POST
@Consumes(MediaType.APPLICATION_JSON)
public Response save(TaskInDto taskInDto) {
    // saving to DB, etc... 
    String taskId = createdTask.getId().toString();
    URI taskUri = uriInfo.getAbsolutePathBuilder().path(taskId).build();
    return Response.created(taskUri).build();
}

My question is regarding REST design: What should I return as a Result object to the user if multiple objects were created?

Answer 1

If a POST request is creating multiple objects, clients will expect back a response entity containing links to each created resource.