Run Commands

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Not all database commands have a specific helper method. However, you can run any MongoDB command by using the MongoDatabase.runCommand() method.

To learn more about MongoDB commands, see Database Commands in the Server manual.

Prerequisites

You must set up the following components to run the code examples in this guide:

A test.restaurants collection populated with documents from the restaurants.json file in the documentation assets GitHub.
The following import statements:

import org.mongodb.scala._

Note

This guide uses the Observable implicits as covered in the Quick Start Primer.

Connect to a MongoDB Deployment

First, connect to a MongoDB deployment, then declare and define a MongoDatabase instance.

The following code connects to a standalone MongoDB deployment running on localhost on port 27017. Then, it defines the database variable to refer to the test database:

val mongoClient: MongoClient = MongoClient()
val database: MongoDatabase = mongoClient.getDatabase("test")

To learn more about connecting to MongoDB deployments, see the Connect to MongoDB guide.

Run the buildInfo Command

To run the buildInfo command, construct a Document object that specifies the command and pass it as a parameter to the runCommand() method.

The following sample code runs the buildInfo command and prints the results:

database.runCommand(Document("buildInfo" -> 1)).printResults()

To view a list of available MongoDB commands, see Database Commands in the Server manual.

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Store Large Files by Using GridFS

Reference