Are the fields connected to datafetcher nullable?

[joont92]

In dgs-examples-kotlin, sample schema is like below

type Show {    
    id: Int!
    title: String!
    releaseYear: Int
    reviews: [Review]
}

In ShowDatafetcher, it sets reviews as null.
And then ReviewsFetcher fills its value.

But what if reviews are mandatory like below?

type Show {    
    id: Int!
    title: String!
    releaseYear: Int
    reviews: [Review]!
    theater: Theater! # Or what if there is any mandatory field like this?
}

Should I set it to nullable?
Or should I have to fill dummy value?
I think setting nullable makes client confusing.

[paulbakker]

In this case I would set the schema type to non-nullable, but make the Kotlin type nullable.
If you're using codegen, you can use the kotlinAllFieldsOptional setting to do so.