3 files changed, 14 insertions, 0 deletions
diff --git a/src/main/java/design/model/Club.java b/src/main/java/design/model/Club.java
index 9fa3c87..b12fd99 100644
--- a/src/main/java/design/model/Club.java
+++ b/src/main/java/design/model/Club.java
@@ -1,5 +1,13 @@
 package design.model;
 
+import com.fasterxml.jackson.annotation.JsonIdentityInfo;
+import com.fasterxml.jackson.annotation.ObjectIdGenerators;
+
+@JsonIdentityInfo(
+        generator = ObjectIdGenerators.PropertyGenerator.class,
+        property = "id",
+        scope = Club.class
+)
 public class Club {
 
     public enum ClubType {
diff --git a/src/main/java/design/model/Golfer.java b/src/main/java/design/model/Golfer.java
index 774bb78..48daae8 100644
--- a/src/main/java/design/model/Golfer.java
+++ b/src/main/java/design/model/Golfer.java
@@ -1,10 +1,12 @@
 package design.model;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 
 import java.util.ArrayList;
 import java.util.List;
 
+@JsonPropertyOrder({ "clubs", "nextClubId" })
 public class Golfer {
     private String username;
     private int passwordHash;
diff --git a/src/main/java/design/model/Swing.java b/src/main/java/design/model/Swing.java
index a93b66f..43c20f0 100644
--- a/src/main/java/design/model/Swing.java
+++ b/src/main/java/design/model/Swing.java
@@ -1,7 +1,11 @@
 package design.model;
 
+import com.fasterxml.jackson.annotation.JsonIdentityReference;
+
 public class Swing {
     private final int distance;
+
+    @JsonIdentityReference(alwaysAsId = true)
     private final Club clubUsed;
 
     public Swing(int distance, Club clubUsed) {