Java Spring boot web service

Question

My class

@Repository
public class UserRepositoryImp implements UserRepository {

  private EntityManager entityManager;

  @Autowired
  public UserRepositoryImp(EntityManager entityManager) {
    this.entityManager = entityManager;
  }

  @Override
  public Integer getCountByEmail(String email) {
    Session session = entityManager.unwrap(Session.class);

    TypedQuery<User> query = session.createQuery("SELECT count(e)  FROM User e WHERE e.email=:email", User.class);
    query.setParameter("email", email);
    return query.executeUpdate();
}

My Postman error

"Type specified for TypedQuery [com.TestMobileAppService.TestMobileAppService.Domain.User] is incompatible with query return type [class java.lang.Long]; nested exception is java.lang.IllegalArgumentException: Type specified for TypedQuery [com.TestMobileAppService.TestMobileAppService.Domain.User] is incompatible with query return type [class java.lang.Long]"

Please help me what is it problem???

Answer 1

You query in variable MY_SQL_COUNT_EMAIL returns a count instead of User object, Change the data type of variable either to Long or Integer, something like given below

@Override
public Integer getCountByEmail(String email) {
  Session session = entityManager.unwrap(Session.class);
  
     TypedQuery<Integer> query = session.createQuery(MY_SQL_COUNT_EMAIL,Class.forName();
     query.setParameter("email", email);    
      return query.executeUpdate();
}