The kotlinx.serialization DSL (Person::name eq "John Doe") does not provide a method to query an array.

Person::hobbies eq "coding" // does not compile since hobbies is a List<String>

There are two options to solve the problem:

1. Write an additional extension function such as 

infix fun <T> KProperty<List<T>>.eq(value: T): Bson = com.mongodb.client.model.Filters.eq(path(), value) 

This would be closer to the MongoDB query syntax.

2. Introduce a contains/in operator so you can write

Person::hobbies contains "coding"

and/or

"coding" in Person::hobbies

which would be more Kotlin-idiomatic