Type converters

Map a field that is not a SQLite type to one that is (String, number, Blob, …).

data class Money(val cents: Long)

@TypeConverter
class MoneyConverter : com.dbflow5.converter.TypeConverter<Long, Money> {
    override fun getDBValue(model: Money): Long = model.cents
    override fun getModelValue(data: Long): Money = Money(data)
}

@Table
data class Account(
    @PrimaryKey val id: Int = 0,
    val balance: Money,
)

The annotation registers the converter globally. Both methods are non-null; handle nullability in the model property instead.

Do not convert:

• Parameterized types (List<T>)
• One custom type into another custom type (chain two converters if you must)
• A @Table type (use @ForeignKey)

allowedSubtypes on @TypeConverter registers the same converter for subclasses.