小编wyp*_*prz的帖子

我有一个实体Ride,它嵌入了一个可嵌入的"实体" 路径.路线有一个列表属性城镇与多对多的关系,所以它有fetchtype LAZY(我不希望使用EAGER).所以我想定义的实体NamedEntityGraph 平顺,加载加载骑一个物体路线与instantied名单城镇.但是当我部署战争时,我得到了这个例外:

java.lang.IllegalArgumentException:Attribute [route]不是托管类型

骑

@Entity
@NamedQueries({
@NamedQuery(name = "Ride.findAll", query = "SELECT m FROM Ride m")})
@NamedEntityGraphs({
@NamedEntityGraph(
        name = "rideWithInstanciatedRoute",
        attributeNodes = {
            @NamedAttributeNode(value = "route", subgraph = "routeWithTowns")
        },
        subgraphs = {
            @NamedSubgraph(
                    name = "routeWithTowns",
                    attributeNodes = {
                        @NamedAttributeNode("towns")
                    }
            )
        }
    )
})
public class Ride implements Serializable {

    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = …

我有一个父母与一个孩子表的OneToMany关联。

我正在尝试使用CriteriaBuilder编写查询，以限制从Child表返回的结果。

我要添加一个谓词，例如

cb.equal(parent.get("children").get("sex"), "MALE")

如果父母有儿子或儿子和女儿，则是在返还该父母的同时还返还他们所有的孩子。

Hibernate使用我的谓词触发第一个查询，但是第二个获取子项的查询仅在不包含where子句的情况下使用JoinColumn

cb.equal(parent.get("children").get("sex"), "MALE").

有什么想法吗？

我正在使用SetJoin

children = parent.joinSet("children", JoinType.LEFT)

澄清：

public static Specification<Parent> findPlanBenefits(Integer parentId) {
    return (parent, query, cb) -> {
        Predicate predicates = cb.conjunction();
        List<Expression<Boolean>> expressions = predicates.getExpressions();

        //Parent Criteria
        expressions.add(cb.equal(parent.get("parentId"), parentId));

        //Children Criteria
        SetJoin<Parent, Children> children = parent.joinSet("children", JoinType.LEFT);

        Predicate sex = cb.equal(children.get("sex"), "MALE");
        children.on(sex);

        return predicates;
    };
}

I'm trying to run a query where I get specific Work done by a Customer based of their id. I'm having troubles making a queue with JPQL that will actually retrieve all the data based on the foreign key of the customerId.

I've tried SELECT w FROM WorkEntry w WHERE w.customerId = 1 and that doesn't work. Every time I try to run it using the Persistence Unit testing I get the following error:

java.lang.IllegalArgumentException: An exception occurred while …