Hands-On Server-Side Web Development with Swift

Retrieving an item by ID

The handler for getting a record of an existing journal entry makes use of parameters to get the id for the entry and retrieve the JournalEntry object automatically using the next(JournalEntry.self) method call:

func getEntry(_ req: Request) throws -> Future<JournalEntry> {    return try req.parameters.next(JournalEntry.self)}

You can try to retrieve a journal entry with curl and provide an ID for the item:

$ curl http://localhost:8080/api/admin/1

With the /api/admin/<id> endpoint, curl will ask your handler to retrieve the specified item and print out the journal entry wrapped in a JSON object if the item is found.