具有嵌入式ElementCollections的JPA CriteriaBuilder

问题描述 投票:1回答:1

我正在尝试从具有包含ElementCollection的嵌入式实体的对象中查询

enum class MyEnum {VALUE1, VALUE2}

data class MyObject(

    @Embedded
    val embedded: EmbeddedObject? = EmbeddedObject(),
)


@Embeddable
data class EmbeddedObject(

    @ElementCollection(targetClass = MyEnum::class)
    @CollectionTable(name = "t_my_enum", joinColumns = [JoinColumn(name = "fk_my_object")])
    @Column(name = "enum_value")
    @Enumerated(value = STRING)
    val enumValues: Set<MyEnum> = mutableSetOf(),
}

我现在正在尝试过滤结果以包含MyEnum中的一组值。当前方法(不起作用):

    val myFilter = mutableSetOf(VALUE1)
    val criteria: CriteriaBuilder = entityManager.criteriaBuilder
    val query: CriteriaQuery<MyObject> = criteria.createQuery(MyObject::class.java)
    val root: Root<MyObject> = query.from(MyObject::class.java)
    root.where(root.get<EmbeddedObject>("embedded").get<Set<MyEnum>>("enumValues").`in`(myFilter)))

此操作失败,并显示以下错误消息:

java.lang.IllegalArgumentException: Parameter value [VALUE1] did not match expected type [java.util.Set (n/a)]

我也尝试加入EmbeddedObject或enumValues列,但两者均无效。

hibernate jpa criteria-api
1个回答
© www.soinside.com 2019 - 2024. All rights reserved.