Kotlin,JPA和@Transient
问题描述:
我有一个实体类,我已经从Java迁移到Kotlin。其中一个属性(inetAddress
)使用@Transient
进行注释,以防止它被持久保存到关系数据库中。但是,JPA(Hibernate实现)没有看到这个注释并将它放在数据库中,因为它是自己的字段。当这个类用Java编写时,这一切都可以正常工作。Kotlin,JPA和@Transient
是否有人知道如何正确注释这个Kotlin类,以便JPA/Hibernate将看到@Transient
注释,而不是将inetAddress
属性放在数据库中?
package infr.audio.model
import com.fasterxml.jackson.annotation.JsonIgnore
import com.fasterxml.jackson.annotation.JsonProperty
import infr.audio.messages.InetAddressWrapper
import java.io.Serializable
import java.net.InetAddress
import javax.persistence.Column
import javax.persistence.Entity
import javax.persistence.GeneratedValue
import javax.persistence.Id
import javax.persistence.NamedQueries
import javax.persistence.NamedQuery
import javax.persistence.Table
@Entity
@Table(name = "DIS_JOCKEY")
@NamedQueries(NamedQuery(name = "DisJockeyInfo.find", query = "SELECT m FROM DisJockeyInfo m"), NamedQuery(name = "DisJockeyInfo.findByReservationId", query = "SELECT m FROM DisJockeyInfo m WHERE m.reservationId = :reservationId"), NamedQuery(name = "DisJockeyInfo.findByReservationIdAndName", query = "SELECT m FROM DisJockeyInfo m WHERE m.reservationId = :reservationId AND m.name = :name"), NamedQuery(name = "DisJockeyInfo.findMaxDisEntityIdByReservationId", query = "SELECT MAX(m.disEntityId) FROM DisJockeyInfo m WHERE m.reservationId = :reservationId"), NamedQuery(name = "DisJockeyInfo.findActive", query = "SELECT m FROM DisJockeyInfo m WHERE m.disEntityId IS NOT NULL"), NamedQuery(name = "DisJockeyInfo.findActiveByInetAddress", query = "SELECT m FROM DisJockeyInfo m WHERE m.inetAddress = :inetAddress AND m.disEntityId IS NOT NULL"), NamedQuery(name = "DisJockeyInfo.findActiveByReservationId", query = "SELECT m FROM DisJockeyInfo m WHERE m.reservationId = :reservationId AND m.disEntityId IS NOT NULL"), NamedQuery(name = "DisJockeyInfo.deleteInactive", query = "DELETE FROM DisJockeyInfo m WHERE m.id = :id AND m.disEntityId IS NULL"))
data class DisJockeyInfo(
@get:Id
@get:GeneratedValue(strategy = GenerationType.IDENTITY)
@get:Column(name = "ID")
var id: Long,
@get:Column(name = "RESERVATION_ID")
var reservationId: String?,
@get:Column(name = "NAME")
var name: String?,
@get:Column(name = "DIS_ENTITY_ID")
var disEntityId: Long?,
@get:java.beans.Transient
@get:JsonIgnore
@field:Transient
var inetAddress: InetAddress?
) : GenericEntity, Serializable {
var inetAddressString: String?
@Column(name = "INET_ADDRESS")
@JsonProperty("inetAddress")
get() = if (inetAddress != null) InetAddressWrapper(inetAddress).encodedInetAddress else null
set(inetAddressString) {
inetAddress = if (inetAddressString != null) InetAddressWrapper(inetAddressString).inetAddress else null
}
constructor() : this(id = 0L, reservationId = null, name = null, disEntityId = null, inetAddress = null) {}
companion object {
/** Serial version */
private val serialVersionUID = 2027355982760360935L
}
}
答
您注释的字段,而不是注释吸气剂。请注意,您的getter注释使用不正确的类型(java.beans.Transient
)而不是正确的javax.persistence.Transient
。
您注释的是该字段而不是注释吸气剂。 –
我还没有使用Kotlin很长时间,但我相信我会在字段和getter上放置'@ Transient'注释:'@get:java.beans.Transient'。这就是'@get:'部分的意思,不是? – Yoshiya
除了正确的注释不是java.beans.Transient,而是javax.persistence.Transient –