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

isNull

open fun Field<T, *>.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.doesNotExist Checks if the value is not set.

• FilterQuery.isNotNull Opposite.

open fun KProperty1<T, *>.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.doesNotExist Checks if the value is not set.

• FilterQuery.isNotNull Opposite.