休眠异常-找不到命名参数[：laboratoryId]

Question

I have the following query in Hibernate.I got Hibernate Exception and I don't understand why Hibernate throws this exception. Could anyone help me?

Session session = this.sessionFactory.openSession();

session.createQuery("delete from Laboratory l where l.id=:laboratoryId")
        .setParameter("laboratoryId", laboratoryId).executeUpdate();
session.close();

Answer 1

Try to add some spaces between the = sign and the bind name :laboratoryId and remove the alias:

Session session = this.sessionFactory.openSession();

session.createQuery("delete from Laboratory where id = :laboratoryId")
    .setParameter("laboratoryId", laboratoryId)
    .executeUpdate();
session.close();

Answer 2

Are you sure that laboratoryID has value? For my query builder I used something like this:

if (!laboratoryId.isEmpty()) { 
        query.setParameter("laboratoryId", laboratoryId());
        }

also same thing for query

  "delete o from Laboratory o"

if(!laboratoryId.isEmpty()){
query.append("where o.id = (:laboratoryId)")

}

But I used it for String values

Please show code for laboratoryId - is it user input or what?

Answer 3

You can try this one.

DELETE Clause

The DELETE clause can be used to delete one or more objects. Following is the simple syntax of using DELETE clause:

String hql = "DELETE FROM Employee "  + 
         "WHERE id = :employee_id";
Query query = session.createQuery(hql);
query.setParameter("employee_id", 10);
int result = query.executeUpdate();
System.out.println("Rows affected: " + result);