JAVA-16567 Potential issue in An Overview of Identifiers in Hibernate/JPA article (#13248)

persistence-modules/hibernate5/src/main/java/com/baeldung/hibernate/pojo/OrderEntryIdClass.java

@@ -3,6 +3,7 @@ package com.baeldung.hibernate.pojo;
 import javax.persistence.Entity;
 import javax.persistence.Id;
 import javax.persistence.IdClass;
+import javax.persistence.ManyToOne;
 
 @Entity
 @IdClass(OrderEntryPK.class)
@@ -11,6 +12,8 @@ public class OrderEntryIdClass {
     private long orderId;
     @Id
     private long productId;
+    @ManyToOne
+    private User user;
 
     public long getOrderId() {
         return orderId;
@@ -28,4 +31,12 @@ public class OrderEntryIdClass {
         this.productId = productId;
     }
 
+    public User getUser() {
+        return user;
+    }
+
+    public void setUser(User user) {
+        this.user = user;
+    }
+
 }

persistence-modules/hibernate5/src/main/java/com/baeldung/hibernate/pojo/OrderEntryPK.java

@@ -4,6 +4,7 @@ import java.io.Serializable;
 import java.util.Objects;
 
 import javax.persistence.Embeddable;
+import javax.persistence.ManyToOne;
 
 @Embeddable
 public class OrderEntryPK implements Serializable {
@@ -11,6 +12,9 @@ public class OrderEntryPK implements Serializable {
     private long orderId;
     private long productId;
 
+    @ManyToOne
+    private User user;
+
     public long getOrderId() {
         return orderId;
     }
@@ -27,6 +31,14 @@ public class OrderEntryPK implements Serializable {
         this.productId = productId;
     }
 
+    public User getUser() {
+        return user;
+    }
+
+    public void setUser(User user) {
+        this.user = user;
+    }
+
     @Override
     public boolean equals(Object o) {
         if (this == o) {

persistence-modules/hibernate5/src/test/java/com/baeldung/hibernate/IdentifiersIntegrationTest.java

@@ -63,9 +63,12 @@ public class IdentifiersIntegrationTest {
 
     @Test
     public void whenSaveCompositeIdEntity_thenOk() {
+        User user = new User();
+
         OrderEntryPK entryPK = new OrderEntryPK();
         entryPK.setOrderId(1L);
         entryPK.setProductId(30L);
+        entryPK.setUser(user);
 
         OrderEntry entry = new OrderEntry();
         entry.setEntryId(entryPK);
@@ -77,9 +80,12 @@ public class IdentifiersIntegrationTest {
 
     @Test
     public void whenSaveIdClassEntity_thenOk() {
+        User user = new User();
+
         OrderEntryIdClass entry = new OrderEntryIdClass();
         entry.setOrderId(1L);
         entry.setProductId(30L);
+        entry.setUser(user);
         session.save(entry);
 
         assertThat(entry.getOrderId()).isEqualTo(1L);