Cannot be @Required or @NotNull.

Goal

Compile the project

Expected Results

Compile without errors

Actual Results

Error: Field “fields” with type “com.myApp.sample” cannot be @Required or @NotNull.

Steps & Code to Reproduce

I just updated the Realm version (realm-gradle-plugin) from 3.5.0 to 3.7.2. If I move back to 3.5.0 it works.

Code Sample

class Class(@PrimaryKey var id: Int = 0, var fields: Fields): RealmObject()

Version of Realm and tooling

Realm version(s): 3.7.2

Realm sync feature enabled: No

Android Studio version: 3.0 Beta 6

Which Android version and device: None

[ppamorim]

Hi folks.

You are breaking the implementation of the library on all possible Kotlin projects just to satisfy a new behavior. I recommend you to think again the implementation and stop forcing the developer to, in a very hard way, change the source code. Just because Realm is not capable to always return a non null object, it doesn’t means that the library can’t handle it. Should be good to have a way to disable this nullability verification or add a default value. But let the developer choose what to do with the project, not the inverse. I will expend a lot of time just to solve this nullability issue and I will increase the risk of failure on my software.

Sorry, but this is very frustating and annoying.

[cmelchior]

@ppamorim It isn’t really a new behavior, but just exposing the reality of the underlying Realm correctly.

If you can guarantee internally that the reference is never null, you can use it as a backing property: https://kotlinlang.org/docs/reference/properties.html#backing-properties and then do the conversion in custom getters and setters, like:

    var _person: Person? = null

    // Automatically ignored as it doesn't have a backing field
    var person: Person
        get() = _person!!
        set(value) {
            _person = value
        }