mongodb-driver-kotlin-coroutine/com.mongodb.kotlin.client.coroutine/MongoCollection/countDocuments

countDocuments

suspend fun countDocuments(filter: Bson = BsonDocument(), options: CountOptions = CountOptions()): Long

Counts the number of documents in the collection.

Note: For a fast count of the total documents in a collection see estimatedDocumentCount. When migrating from count() to countDocuments() the following query operators must be replaced:

+-------------+--------------------------------+
| Operator    | Replacement                    |
+=============+================================+
| $where      |  $expr                         |
+-------------+--------------------------------+
| $near       |  $geoWithin with $center       |
+-------------+--------------------------------+
| $nearSphere |  $geoWithin with $centerSphere |
+-------------+--------------------------------+

Return

the number of documents in the collection

suspend fun countDocuments(clientSession: ClientSession, filter: Bson = BsonDocument(), options: CountOptions = CountOptions()): Long

Counts the number of documents in the collection according to the given options.

Note: For a fast count of the total documents in a collection see estimatedDocumentCount. When migrating from count() to countDocuments() the following query operators must be replaced:

+-------------+--------------------------------+
| Operator    | Replacement                    |
+=============+================================+
| $where      |  $expr                         |
+-------------+--------------------------------+
| $near       |  $geoWithin with $center       |
+-------------+--------------------------------+
| $nearSphere |  $geoWithin with $centerSphere |
+-------------+--------------------------------+

Return

the number of documents in the collection

Parameters

clientSession

the client session with which to associate this operation

filter

the query filter

options

the options describing the count