Fixed user/del endpoint

server/src/main/java/com/vpr/server/controller/UserController.java

@@ -144,6 +144,9 @@ public class UserController {
         if (user == null) {
             return new ResponseEntity<>("User nicht in der Datenbank vorhanden", HttpStatus.BAD_REQUEST);
         }
+        if(userDAO.deleteAllUserEvents(user.getId())){
+            return new ResponseEntity<>("User konnte nicht gelöscht werden", HttpStatus.INTERNAL_SERVER_ERROR);
+        }
         userRepository.delete(user);
         return new ResponseEntity<>("", HttpStatus.OK);
     }

server/src/main/java/com/vpr/server/dao/implementation/UserDAOImplementation.java

@@ -21,4 +21,17 @@ public class UserDAOImplementation implements UserDAO {
     public List<User> getAllUser() {
         return manager.createNamedQuery("getAllUser", User.class).getResultList();
     }
+
+    @Override
+    public boolean deleteAllUserEvents(long userId) {
+        try {
+            manager.createNamedQuery("deleteAllUserEvents", User.class)
+                    .setParameter("userId", userId)
+                    .executeUpdate();
+
+            return true;
+        }catch (Exception e){
+            return false;
+        }
+    }
 }

server/src/main/java/com/vpr/server/dao/interfaces/UserDAO.java

@@ -6,4 +6,6 @@ import java.util.List;
 
 public interface UserDAO {
     List<User> getAllUser();
+
+    boolean deleteAllUserEvents(long userId);
 }

server/src/main/java/com/vpr/server/data/User.java

@@ -6,11 +6,21 @@ import java.util.List;
 // @Entity creates a table out of this class with Hibernate
 @Entity(name = "User")
 @Table(name = "user")
+
+@SqlResultSetMapping(name="deleteResult", columns = {
+        @ColumnResult(name = "count")
+})
+
 @NamedNativeQueries({
     @NamedNativeQuery(
         name = "getAllUser",
         query = "SELECT * FROM user",
         resultClass = User.class
+    ),
+    @NamedNativeQuery(
+        name = "deleteAllUserEvents",
+        query = "DELETE FROM user_event WHERE user_id = :userId",
+            resultSetMapping = "deleteResult"
     )
 })
 public class User {