ObjectBox总是为Kotlin中的内部数据类返回null

我正在使用API调用的改型。 但是现在我想缓存另一个模型类,它有嵌套的模型类,比如 下面。

@Entity data class ConsumptionDashboardResponse(
        @Id(assignable = true)
        var id: Long? = null,
        @Transient
        @SerializedName("data")
        @NameInDb("data_consumption")
        var `data`: DataConsumption,
        @SerializedName("responseCode")
        val responseCode: Int,
        @SerializedName("responseDesc")
        val responseDesc: String,
        @SerializedName("sessionLang")
        val sessionLang: String )

数据消费类:

@Entity
data class DataConsumption(
        @Id(assignable = true)
        var id: Long? = null,

        @Backlink
        @Transient
        @SerializedName("listDivisions")
        var listDivisions: List<Divisions>
)

和划分类

@Entity
data class Divisions(
        @Id(assignable = true)
        var id: Long? = null,
        @SerializedName("aggregateBalance")
        val aggregateBalance: String,
        @SerializedName("aggregateConsumption")
        val aggregateConsumption: String,
        @SerializedName("division")
        val division: String,
        @Backlink
        @Transient
        @SerializedName("listConsumption")
        var listConsumption: List<Consumption>,
        @SerializedName("unit")
        val unit: String
)

@Entity
data class Consumption(
        @Id(assignable = true)
        var id: Long? = null,
        @SerializedName("aggregateConsumption")
        val aggregateConsumption: String,
        @SerializedName("billingPeriod")
        val billingPeriod: String
)

我找不到我是否需要任何类型的自定义转换器或我需要做什么。

ConsumptionDashboardResponse(id=4, data=null, responseCode=200, responseDesc=SUCCESS, sessionLang=AR)