IssueTracker

Component used:

• androidx.room.room-common

Version used:

• jetpackRoom = "2.7.0-alpha11"
• kotlin = "2.1.0"
• googleKsp = "2.1.0-1.0.29"

Devices/Android versions reproduced on:

• Any device. It won't compile.

Description:

In the new multiplatform version, when a field has a custom nullable type (like Duration?), the generated code for the MyDao_Impl in Kotlin has something like this:

val _tmpRestMin: Duration?
if (_cursorIndexOfRestMin == -1) {
  _tmpRestMin = 0 // it should be null

Which gives the error "The integer literal does not conform to the expected type Duration?", even though the TypeConverter was correctly set in the abstract implementation of RoomDatabase.

Everything works fine with the previous version that generates the classes in Java.

Oddly, with Instant? it generates correctly:

val _tmpDoneAt: Instant?
if (_cursorIndexOfDoneAt == -1) {
  _tmpDoneAt = null

The converters are almost identical:

    @TypeConverter
    fun durationToLong(duration: Duration?): Long? = duration?.inWholeMilliseconds

    @TypeConverter
    fun durationFromLong(milliseconds: Long?): Duration? =
        milliseconds?.toDuration(DurationUnit.MILLISECONDS)

   @TypeConverter
    fun instantFromLong(value: Long?): Instant? =
        value?.let { Instant.fromEpochMilliseconds(it) }

    @TypeConverter
    fun instantToLong(timestamp: Instant?): Long? = timestamp?.toEpochMilliseconds()