JPQL: The state field path cannot be resolved to a valid type

Question

I can\'t make this query work:

Query query = eManager.createQuery(\"select c FROM News c WHERE c.NEWSID = :id\",News.class);
        return (News)query.setPara         


        

Answer 1

My entity is:

@Entity
@Table(name = "TBL_PERSON_INFO")
public class Person implements Serializable {
    @Id
    @Column(name = "ID", nullable = false)
    private Integer id;

    @Column(name = "USER_ID", nullable = false)
    private Integer user_id;
    .
    .
    .
}

my query is (JPQL):

String queryName = "from Person p where p.user_id = :user_id";

so I use it like this:

        javax.persistence.Query query = em.createQuery(queryName);
        query.setParameter("user_id", userId);

        try {
            obj = query.getSingleResult();
        }
        catch (javax.persistence.NoResultException nre) {
            logger.error("javax.persistence.NoResultException: " + nre.getMessage());
        }
        catch (javax.persistence.NonUniqueResultException nure) {
            logger.error("javax.persistence.NonUniqueResultException: " + nure.getMessage());
        }
        catch (Exception e) {
            e.printStackTrace();
        }

        if (obj == null) {
            System.out.println("obj is null!");
            return null;
        }

        Person person = (Person) obj;

It's work ;-)