Changed date to PRIMARY KEY

server/src/main/java/com/vpr/server/UserEvent.java

@@ -20,6 +20,8 @@ public class UserEvent {
     @JoinColumn(name = "event_id", referencedColumnName = "id")
     private Event event;
 
+    @Id
+    @Column(name="date", columnDefinition = "DATE DEFAULT CURRENT_DATE", nullable = false)
     private Date date;
 
     /*********************

server/src/main/java/com/vpr/server/UserEventId.java

@@ -1,10 +1,12 @@
 package com.vpr.server;
 
 import java.io.Serializable;
+import java.sql.Date;
 
 public class UserEventId implements Serializable {
     private long user;
     private long event;
+    private Date date;
 
     /*********************
      * Getter and Setter *
@@ -25,4 +27,12 @@ public class UserEventId implements Serializable {
     public void setEvent(long event) {
         this.event = event;
     }
+
+    public Date getDate() {
+        return date;
+    }
+
+    public void setDate(Date date) {
+        this.date = date;
+    }
 }