IDE

Download

• Download MongoDB for VSCode in Visual Studio Code

Create Cluster

• Create Cluster on MongoDB Web

Connection

• Click Connection button on Mongo DB web and check your cluster connection string.
• Click MongoDb Playground on side bar.
• Connect your cluster in VSCode with your connection string.

• Change the name

Playground

• Create new Playground to add your script.

IRUD

Insert

• use switchs current database.
• db.{collection} accesses to the collection.
• insertOne inserts one document on your collection.

use('video');

var movie = {"title" : "Star Wars: Episode IV - A New Hope" ,
    "director" : "George Lucas",
    "year" : 1977};

db.movies.insertOne(movie);

• insertMany inserts many document on your collection.

db.movies.insertMany([{"title" : "Ghostbusters"}, 
    {"title" : "E.T"}, 
    {"title" : "Blade Runner"}]);

Read

• find shows all documents.

db.movies.find().pretty();

• findOne shows only one document.

db.movies.findOne();

Update

• updateOne updates one document.

db.movies.updateOne({title : "Star Wars: Episode IV - A New Hope"}, 
    {$set : {reviews:[]}});

Delete

• deleteOne deletes one document.

db.movies.deleteOne({title : "Star Wars: Episode IV - A New Hope"});

• deleteMany deletes many documents.

• deleteMany({}) deletes all documents.

Drop

• drop drops the collection.

Blocking

db.dropDatabase = DB.prototype.dropDatabase = no; // block to delete database
DBCollection.prototype.drop = no; // block to delete collection
DBCollection.prototype.dropIndex = no; // block to delete Index
DBCollection.prototype.dropIndexes = no; // block to delete Indexes

Document

Replace

• replaceOne changes database version.

Modifier

• $inc increase field value.

• $set set field value.
• $unset remove field from the document.

• $push adds element or create new array.
• $each adds elements at once.
• $slice limits the array size.
• $sort sorts elements with the field value.
• $each is always needed when you use $push with $slice or $sort.

• $ne finds documents which don’t have not specific value.

• $addToSet add specific value without duplication.

• $ne/$push can add only one value and $addToSet/$each can add several values at once.

• $pop removes array elements like stack or queue.
• {"$pop" : {"key" : 1}} removes elements from last.
• {"$pop" : {"key" : -1}} removes elements from first.

• $pull removes array elements with specific conditions.