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

isNull

open fun isNull()

Selects documents for which the field is null.

Example

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

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

External resources

• Official documentation

See also

• FilterQuery.isNull Shorthand.

• FilterQueryPredicate.doesNotExist Checks if the value is not set.

• FilterQueryPredicate.isNotNull Opposite.