I'm not sure if this is the place to ask and might...

# getting-started

[Yousef]

I'm not sure if this is the place to ask and might not be kotlin specific, but if I want a category with a list of subcategories, but I don't want the subcategories to have their own subcategories, how do I do that?

data class Category(
    val id: UUID,
    var title: String,
    var slug: String,
    var subCategories: List<Category>
)

[Paul Griffith]

One option is distinct (sealed) types with a common interface

Untitled.kt

[Yousef]

That's exactly what I was trying to figure out thank you so much!

[Tobias Berger]

I'd say using a sealed interface is somewhat optional here. You could also use a normal interface. but that could be a bit ugly because of the type of your subcategories property.
If you don't need data classes, another option is to have a simple Category class without the subcategories and another "TopLevelCategory" class that inherits from it and adds the subcategories list. All a matter of style and preference, I myself would also go with the approach mentioned by @Paul Griffith

[Yousef]

I'll keep that in mind thank you