Panache Kotlin JPA Entities defined as class constructors vs. members?

[kenyee]

In https://www.baeldung.com/kotlin/jpa, the recommended way of defining a class is:

@Entity
class Project(
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    val id: Long
)

But in the Panache Kotlin documentation(https://quarkus.io/guides/hibernate-orm-panache-kotlin), it's defined like this:

@entity
class Project {
@id
@GeneratedValue(strategy = GenerationType.IDENTITY)
var id: Long? = null
}

Note the () vs. {} usage.
Which is the correct way of doing this?

Reason the Panache Kotlin one seems wrong is an identity column is a primary key and it should always be non-null... and when I try reading this back from the DB, it's coming in as null even though the DB is incrementing automatically according to the SQL log output from hibernate:

create table Project (
id bigint generated by default as identity,
...

[quarkus-bot[bot]]

/cc @FroMage, @evanchooly, @loicmathieu

[evanchooly]

Either is "correct" so far as that goes. The first just defines a constructor that takes the ID value. the other just defines a field and relies on a default constructor. But both end up with ID fields on the class it just a question of how the instanced are created.