Android Room Database Create Entity Object without Id

Question

My entity class:

@Entity(tableName = "student")
data class Student(
    @PrimaryKey(autoGenerate = true)
    val id: Long,

    val name: String,
    val age: Int,
    val gpa: Double,
    val isSingle: Boolean
) 

The problem is, since the id is auto-generated by the Room database - means no matther what I put for the id into the constructor it will be overridden anyway, and because it is one of the parameter in the constructor, I have to give the id every time like this:

val student = Student(0L, "Sam", 27, 3.5, true)

How can I avoid making up the id so I can just put in the neccessary data like this:

val student = Student("Sam", 27, 3.5, true)

Answer 1

Don't place the id in the constructor:

@Entity(tableName = "student")
data class Student(
    val name: String,
    val age: Int,
    val gpa: Double,
    val isSingle: Boolean
) {
    @PrimaryKey(autoGenerate = true)
    var id: Long? = null
}