MongoDB request DSL • opensavvy.ktmongo.dsl.query • FilterQueryPredicate • doesNotExist

doesNotExist

abstract fun doesNotExist()

Matches documents that do not contain the specified field. Documents where the field if null are counted as existing.

Example

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

collection.find {
    User::name {
        doesNotExist()
    }
}

External resources

• Official documentation

See also

• FilterQuery.doesNotExist Shorthand.

• FilterQueryPredicate.exists Opposite.

• FilterQueryPredicate.isNull Only matches elements that are specifically null.