```const val FORECAST_ID = 0 @Entity(tableName = ...

# room

[Mohsen]

const val FORECAST_ID = 0

@Entity(tableName = "forecast")
data class ForecastEntry(
    @Ignore
    @Embedded(prefix = "current_")
    val current: Current = Current(),
    @Ignore
    @Embedded(prefix = "daily_")
    val daily: List<Daily> = listOf(),
    @Ignore
    @Embedded(prefix = "hourly_")
    val hourly: List<Hourly> = listOf(),
    @Ignore
    val lat: Double = 0.0,
    @Ignore
    val lon: Double = 0.0,
    @Ignore
    val timezone: String = "",
    @Ignore
    @SerializedName("timezone_offset")
    val timezoneOffset: Int = 0
) {
    @PrimaryKey(autoGenerate = false)
    var id: Int = FORECAST_ID

    constructor() : this(Current(), listOf(), listOf())
}

could anyone help me please?

[Harun]

Means you're not passing the ID that's why it shows a null pointer

[Mohsen]

@Harun thanks for answering,
Where and how can I pass the id?
I put the id field in ForecastEntry class.

[Harun]

You can make it to autogenerate by changing the field to true

[Mohsen]

but I have only one record in my database all the time.

[Harun]

Do you have a sample json response for the network?

[Mohsen]

Yes I have, response is ok,
this is API that retrofit class runs.
https://api.openweathermap.org/data/2.5/onecall?lat=34.330502&lon=47.159401&exclude=minutely%2Calerts&units=metric&lang=en&appid=013d94f06abf28d537f9d95ff448e764