Hibernate exception PropertyNotFoundException when using Transformer

Question

I\'m using hibernate and hql for querying in my Java codes. But I got an exception like this:

Caused by: org.hibernate.PropertyNotFoundException: Could not f         


        

Answer 1

Problem found:

Even if the HQL can be translated to sql correctly, but when ResultTransformer gets the result, there will be only 3 fields in the result:

1. A
2. length
3. unit

No matter how many fields in A, they will be aggregated into a single field "A" and since I didn't set any alias to this field, it will be treated as "field 0".

So the problem solved after I changed the HQL like this:

select a.id as id, a.name as name, sum(c.length) as length, min(c.unit) as unit
from A a
left outer join a.b as b
left outer join b.c as c
group by
a.id
a.name

Answer 2

@Access(AccessType.FIELD)

add getter and setter of every field

 @Entity
    @Table(name="A")
    @Access(AccessType.FIELD)
    class A
    {
        @Id
        @Column(name="A_ID", updatable=false)
        private Long id;

       public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id= id;
    }
}