MongoDB Hello World! Example


MongoDB Hello World Example

In this tutorial, let us take a quick look at how to get started with MongoDB with a Hello World! example,

  • Make sure MongoDB has been installed on your system, if not follow the article: Installing MongoDB
  • Start the mongod server,
    # modgod
    MongoDB starting : pid=5249 port=27017 dbpath=/data/db 64-bit host=b2391b608026
    db version v3.6.8
    waiting for connections on port 27017
  • Now start the MongoDB shell using mongo command,
    # mongo
    MongoDB shell version v3.6.8
    connecting to: mongodb://127.0.0.1:27017
    Implicit session: session { "id" : UUID("bc22e919-c624-40bc-9f99-5ce94de57e2c") }
    MongoDB server version: 3.6.8
  • Now lets create our first MongoDB Database using command use your-new-db-name,
    # use myMongoDb
    switched to db myMongoDb
  • Lets create our first MongoDB document called: messages, and add the "Hello World!" message,
    db.myMongoDb.messages.insert({id:1,"message":"Hello World!"});
    WriteResult({ "nInserted" : 1 })
    
  • Lets print our message, by find method,
    > db.myMongoDb.messages.find({id:1});
    { "_id" : ObjectId("6250a4d85a0cb8937f46272f"), "id" : 1, "message" : "Hello World!" }
    > 

Congratulations! You have completed the MongoDB "Hello World!" example!


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