MongoDB driver for Kotlin (synchronous)/opensavvy.ktmongo.sync.operations/CountOperations/count

count

abstract fun count(): Long(source)

Counts how many documents exist in the collection.

External resources

See also

Faster alternative when the result doesn't need to be exact.

abstract fun count(options: <Error class: unknown class><Document>.() -> Unit = {}, predicate: <Error class: unknown class><Document>.() -> Unit): Long(source)

Counts how many documents match predicate in the collection.

Example

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

collection.count {
    User::name eq "foo"
    User::age eq 10
}
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External resources