Creates the given index.

import scala.concurrent.{ ExecutionContext, Future }

import reactivemongo.api.DefaultDB
import reactivemongo.api.indexes.NSIndex

def createIndexes(
  db: DefaultDB, is: Seq[NSIndex.Default])(
  implicit ec: ExecutionContext): Future[Unit] =
  Future.sequence(
    is.map(idx => db.indexesManager.create(idx))).map(_ => {})

_Warning_: given the options you choose, and the data to index, it can be a long and blocking operation on the database. You should really consider reading http://www.mongodb.org/display/DOCS/Indexes before doing this, especially in production.

Drops the specified index on the given collection.

import scala.concurrent.{ ExecutionContext, Future }
import reactivemongo.api.DefaultDB

def dropIndex(db: DefaultDB, name: String)(
  implicit ec: ExecutionContext): Future[Int] =
  db.indexesManager.drop("myColl", name)

Drops the specified index.

import scala.concurrent.{ ExecutionContext, Future }

import reactivemongo.api.DefaultDB
import reactivemongo.api.indexes.NSIndex

def dropIndex(db: DefaultDB, idx: NSIndex.Default)(
  implicit ec: ExecutionContext): Future[Int] =
  db.indexesManager.drop(idx)

Drops all the indexes on the specified collection.

import scala.concurrent.{ ExecutionContext, Future }
import reactivemongo.api.DefaultDB

def dropAllIndexes(db: DefaultDB)(
  implicit ec: ExecutionContext): Future[Int] =
  db.indexesManager.dropAll("myColl")

Creates the given index only if it does not exist on this database.

The following rules are used to check the matching index: - if nsIndex.isDefined, it checks using the index name, - otherwise it checks using the key.

import scala.concurrent.{ ExecutionContext, Future }

import reactivemongo.api.DefaultDB
import reactivemongo.api.indexes.NSIndex

def ensureIndexes(
  db: DefaultDB, is: Seq[NSIndex.Default])(
  implicit ec: ExecutionContext): Future[Unit] =
  Future.sequence(
    is.map(idx => db.indexesManager.ensure(idx))).map(_ => {})

_Warning_: given the options you choose, and the data to index, it can be a long and blocking operation on the database. You should really consider reading http://www.mongodb.org/display/DOCS/Indexes before doing this, especially in production.

Lists all the index on this database.

import scala.concurrent.{ ExecutionContext, Future }

import reactivemongo.api.DefaultDB
import reactivemongo.api.indexes.NSIndex

def listIndexes(db: DefaultDB)(
  implicit ec: ExecutionContext): Future[List[String]] =
  db.indexesManager.list().map(_.flatMap { ni: NSIndex =>
    ni.index.name.toList
  })

Returns a manager for the specified collection.

import scala.concurrent.{ ExecutionContext, Future }
import reactivemongo.api.DefaultDB

def countCollIndexes(db: DefaultDB, collName: String)(
  implicit ec: ExecutionContext): Future[Int] =
  db.indexesManager.onCollection(collName).list().map(_.size)