Grokking Spring Boot
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Data Transfer Objects

We answered the same request, GET /bookings/1, with two versions of the controller. The first version returned the Booking class itself. Its response, formatted for reading and with the two timestamps shortened to "...", was this:

{
  "id": 1,
  "seat": {
    "id": 7012,
    "event": {
      "id": 7,
      "title": "Evening Concert",
      "venue": { "id": 1, "name": "Riverside Hall", "rows": 20, "seatsPerRow": 30 },
      "startsAt": "..."
    },
    "label": "A12",
    "version": 1
  },
  "customer": { "id": 1, "email": "ana@example

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