I am totally new in Kotlin as a former Java guy and try to understand some errors.
I am getting a record from db (Postgres) by using JpaRepository. I want to create a new record but the new record will only have 2 different value in its fields and I want to add it ( not updating the previous one, instead adding new one )
val otp = notificationRepository.findById(id).get()
val newOtp = otp
newOtp.delivery = newOtp.delivery.plusMinutes(OTP_RESEND_TIME_IN_MINUTES);
newOtp.status = NotifyStatus.PENDING
newOtp.id = null // HERE I AM GETTING ERROR
//save logic here
I cannot set id of the new record to null to save it because the ide giving error " Null can not be a value of a non-null type Long "
How can I create a new object by just updating some fields and making 'id' null to store it?
This is how you should define your class:
class Notification(
val id: Long?,
val status: NotifyStatus,
val delivery: DateTime
)
As i did not know what the class look like, i guess you must have a class or data class look like it.
if you want declare a variable nullable you should use ?
after its type.
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