exists¶

open fun Field<T, *>.exists()

Matches documents that contain the specified field, including values where the field value is null.

class User(
    val name: String?,
    val age: Int,
)

collection.find {
    User::age.exists()
}

FilterQuery.doesNotExist Opposite.
FilterQuery.isNotNull Identical, but does not match elements where the field is null.

open fun KProperty1<T, *>.exists()

Matches documents that contain the specified field, including values where the field value is null.

class User(
    val name: String?,
    val age: Int,
)

collection.find {
    User::age.exists()
}