为什么我的 TypeConverter 没有被调用/使用。程序似乎无法识别它

问：

我有一个链接到我的数据库的 TypeConverter 类，但它似乎没有被调用，因此我收到以下错误

ForecastAQSpecified.java:9: error: Cannot figure out how to read this field from a cursor.

private final java.time.LocalDate dt = null;

dt 是我在 JSON 响应中以 epoch Int 形式获得的日期时间。我希望将其转换为 LocalDate。My Entity 类如下所示

    @Entity(tableName = "future_AQ", indices = [Index(value = ["dt"], unique = true)])
    data class ForecastAQ(
        @PrimaryKey(autoGenerate = true)
        val id: Int? = null,
        @Embedded
        val components: Components,
        val dt: Int,
        @Embedded
        val main: Main
    )

val dt：Int 是我想要转换的内容。我的 TypeConverter 类如下

object DateConverter {

    @TypeConverter
    @JvmStatic
    fun stringToDate(str: String?) = str?.let {
        LocalDate.parse(it, DateTimeFormatter.ISO_LOCAL_DATE)
    }

    @TypeConverter
    @JvmStatic
    fun dateToString(localDate: LocalDate?) = localDate?.format(
        DateTimeFormatter.ISO_LOCAL_DATE
    )

    @TypeConverter
    @JvmStatic
    fun timestampToDateTime(dt : Int?): LocalDate? {
        try {
            val sdf = SimpleDateFormat("yyyy-MM-dd'T'hh:mm:ss")
            val netDate = dt?.times(1000L)?.let { Date(it) }
            val sdf2 = sdf.format(netDate)

            return LocalDate.parse(sdf2, DateTimeFormatter.ISO_LOCAL_DATE_TIME)

            Log.d("TAG", "date " + LocalDate.parse(sdf2, DateTimeFormatter.ISO_LOCAL_DATE_TIME).toString());
        } catch (e : Exception) {
            return null
            e.printStackTrace()
        }
    }

前两个在数据库的另一部分是必需的，我在其中以 String 形式接收日期响应。他们被召唤得很好。然而，我的最后一个不是 - 这是我需要将 Int 转换为 DateTime 对象的那个

数据库类如下，供参考

@Database(
    entities = [CurrentConditions::class, ConditionsLocation::class, ForecastWeather::class, ForecastAQ::class],
    version = 1
)

@TypeConverters(DateConverter::class)
abstract class ConditionsDatabase : RoomDatabase() {

    abstract fun getCurrentConditionsDAO() : CurrentConditionsDAO
    abstract fun getConditionsLocationDAO() : ConditionsLocationDAO
    abstract fun getForecastWeatherDAO() : ForecastWeatherDAO
    abstract fun getForecastAirQualDAO() : ForecastAqDAO

    companion object{
        @Volatile private var instance: ConditionsDatabase? = null
        private val LOCK = Any()

        operator fun invoke(context: Context) = instance ?: synchronized(LOCK) {
            instance ?: buildDatabase(context).also {
                instance = it
            }
        }

        private fun buildDatabase(context: Context) =
            Room.databaseBuilder(context.applicationContext,
            ConditionsDatabase::class.java, CURRENT_CONDITIONS_DATABASE_NAME)
                .build()
    }
}

非常感谢