Objectbox ToOne对象为空

Question

发行基础

• ObjectBox版本2.5.1
• 可复制性:总是

嗨，每次我想要载入我的对象时，我都会收到这个错误，即使在保存时，我在调试器中签了名，并且看到关系目标不是null，并且所有的东西都被正确保存。

我有那些trhee实体类

@Entity
data class NetflixCache (
    val results: List<NetflixSearchResult>,
    @Id var objectBoxId: Long?
) {
   var searchParams: ToOne<SearchParams> = ToOne<SearchParams>(this, NetflixCache_.searchParams)
}

@Entity
data class SearchParams(val genrelist: String, 
                        val type: String,
                        val imdbRatingMin: String,
                        val countryId: String,
                        val startYear: Int,
                        val endYear: Int,
                        val offset: Int? = 0,
                        val timeStamp: Long,
                        @Id var id: Long? = null)

@Entity
data class NetflixSearchResult (
    val vtype: String?,
    val img: String?,
    val nfid: Long?,
    val imdbid: String?,
    val title: String?,
    val clist: String?,
    val poster: String?,
    val imdbrating: Double?,
    val synopsis: String?,
    val titledate: Date?,
    val year: Int?,
    var id: Long,
    @Id var objectBoxId: Long?
)

使用此代码保存：

val cacheBox = LetsFlixApplication.boxStore.boxFor(NetflixCache::class.java)
val netflixCache = NetflixCache(searchResults, null)
netflixCache.searchParams.target = searchParams
cacheBox.put(netflixCache)

并加载以下代码：

val cachedResult = cacheBox.all //<-Exception is thrown here

正如您在保存时在调试器中看到的那样，ToOne对象不是null：https://ibb.co/s3tdhqP

这是我得到的确切异常消息: ToOne对象在com.haenles.letsflix.domain.NetflixCache中为null

Answer 1

对于我来说，数据类缺少了文档中推荐的默认值。

@Entity
data class User(
        @Id var id: Long = 0,
        var name: String? = null
)