java-graphql -无法将类型定义与java类型匹配

Question

我正在使用graphql-spring-boot来服务来自我的spring-boot项目的graphql查询。现在，我正在将graphql方案类型定义与我的spring entites进行匹配。无论出于什么原因，我都会收到以下错误：

Caused by: com.coxautodev.graphql.tools.SchemaClassScannerError: Unable to match type definition (ListType{type=TypeName{name='HomestayInfo'}}) with java type (class ninja.familyhomestay.domain.HomestayInfo): Java class is not a List or generic type information was lost: class ninja.familyhomestay.domain.HomestayInfo
    at com.coxautodev.graphql.tools.TypeClassMatcher.error(TypeClassMatcher.kt:19)
    at com.coxautodev.graphql.tools.TypeClassMatcher.match(TypeClassMatcher.kt:79)
    at com.coxautodev.graphql.tools.TypeClassMatcher.match(TypeClassMatcher.kt:25)

下面是我为HomestayInfo定义的graphql模式

type HomestayInfo{
    homestayName: String
    homestayShortDescription: String
    homestayDescription: String
    address: Address
    rooms: [Room]
    houseImages: [HouseImage]
    pets: [Pet]
}

和对应的kotlin实体：

@Entity
@Table(name = "homestay_info")
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
@Document(indexName = "homestay_info")
data class HomestayInfo(
    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "sequenceGenerator")
    @SequenceGenerator(name = "sequenceGenerator")
    var id: Long? = null,

    @Column(name = "homestay_name")
    var homestayName: String? = null,

    @Column(name = "homestay_short_description")
    var homestayShortDescription: String? = null,

    @Column(name = "homestay_description")
    var homestayDescription: String? = null,

    @OneToOne
    @JoinColumn(name = "address_id")
    var address:Address?=null,

    @OneToMany(mappedBy = "homestayInfo", cascade = [CascadeType.ALL], fetch = FetchType.LAZY)
    var rooms: MutableSet<Room> = HashSet(),

    @OneToMany(mappedBy = "homestayInfo", cascade = [CascadeType.ALL], fetch = FetchType.LAZY)
    var houseImages: MutableSet<HouseImage> = HashSet(),

    @OneToMany(mappedBy = "homestayInfo", cascade = [CascadeType.ALL], fetch = FetchType.LAZY)
    var pets: MutableSet<Pet> = HashSet()
) : Serializable

我看不出映射有什么问题。有什么想法吗？

Answer 1

将标量日期添加到schema.graphqls文件的顶部应该可以做到这一点！因此，您的文件将如下所示：

scalar Date

schema {           // not sure if your file has this, but mine does

   query: Query

}

type HomestayInfo{
...