hibernate Could not find setter (모델 ProjectionList 오류)

Hibernate

hibernate Could not find setter (모델 ProjectionList 오류)

자바초보자 2016. 6. 2. 00:35

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Hibernate

Amodel - @ManyToOne Bmodel

Bmodel - @OneToMany Cmodel

Amodel 만 조건 없이 select 할 경우 A,B,C 모델이 한번에 JOIN, SELECT에 의해 조회가됨.

A,B model select가 필요한 경우 ProjectionList로 설정하여 필요한 컬럼만 select해서 가져와야함.

class Person {
private Long id;
private String name;
private Car car;
// getters and setters
}

class Car {
private Long id;
private String color;
// getters and setters
}

List<Person> getPeople() {
ProjectionList projections = Projections.projectionList()
    .add(Projections.id().as("id"))
    .add(Projections.property("name").as("name"))
    .add(Projections.property("c.id").as("car.id"))
    .add(Projections.property("c.color").as("car.color"));

Criteria criteria = getCurrentSession().createCriteria(Person.class)
    .createAlias("car", "c")
    .setProjection(projections)
    .setResultTransformer(Transformers.aliasToBean(Person.class));

return (List<Person>) criteria.list();
}