update to latest branch

.vscode/settings.json

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+{
+    "git.ignoreLimitWarning": true
+}

Full Stack Webdevlopment/.vscode/settings.json

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+{
+    "git.ignoreLimitWarning": true
+}

Full Stack Webdevlopment/MongoDB/tut81.js

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+
+//CRUD operations
+
+//create
+// Inserting data in mongo db
+use harryKart
+
+db.items.insertOne({name: "Samsung 30s", price: 22000, rating: 4.5, qty: 233, sold: 98})
+
+db.items.insertMany([{name: "Samsung 30s", price: 22000, rating: 4.5, qty: 233, sold: 98}, {name: "Moto 30s", price: 29000, rating: 3.5, qty: 133, sold: 598}, {name: "Realme 80s", price: 129000, rating: 2.5, qty: 633, sold: 98, isBig: true}])

Full Stack Webdevlopment/MongoDB/tut82.js

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+
+//searching for data in mongo db
+use harrykart
+
+// Read
+// the query will return all the object with rating equal to 3.5
+db.items.find({rating:3.5});
+db.items.find({rating: {$gte:4.0}})
+db.items.find({rating: {$gt:4.0}})
+
+
+// and operator
+db.items.find({rating: {$gt:4.0},price:{$gt:25000}})
+db.items.find({rating: {$lt:4.0},price:{$gt:114000}})
+
+
+// or operator
+db.items.find({$or:[{rating:{$lt:4.5}},{price:{$gt:30000}}]})
+
+
+// perticular data filtering
+db.items.find({rating:{$gt:3.5}}, {rating:1});
+db.items.find({rating:{$gt:3.5}}, {rating:1,qty:1});

Full Stack Webdevlopment/MongoDB/tut83.js

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+
+//DELETE
+show dbs
+show harrykart
+show collections
+
+db.items.find()
+
+db.items.find({price:22000})
+
+//deleting items from the mongo DataBase
+db.items.deleteOne({price:22000})
+
+
+// deletOne will delete the matching entry and will delete the first entry in case of multi document match
+db.items.deleteMany({price:22000})

Full Stack Webdevlopment/MongoDB/tut84.js

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+
+// show the database
+show dbs
+
+// use the harrykart database
+use harrykart
+
+// how to create database
+use newDB
+
+// show database items
+show harrykart
+
+// show the harrykart collections
+show collections
+
+// show the all items
+db.items.find()
+
+
+// update the one object
+db.items.updateOne({name:"Samsung 30s"},{$set:{price : 2}})
+db.items.find()
+
+
+// update the many object
+db.items.updateMany({name:"Samsung 30s"},{$set:{rating : 2}})
+db.item.find()
+
+

Full Stack Webdevlopment/MongoDB/tut85.js

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+
+/*
+// mongoose is helping directly use in the nodejs
+
+// mongoDB Compass
+pehale hum mongoSell used karate the bad me hum MongoDB Compass use karate hai.
+
+// mongod  -> main database process hai
+                    -> we can connect any thing(nodejs, python, php, mongoose) with mongod 
+
+ ODM ->open document modling
+
+
+ mongod is server and mongo is clinet
+
+*/

Full Stack Webdevlopment/MongooseTutorial/index.js

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+
+// getting-started.js
+const mongoose = require('mongoose');
+mongoose.connect('mongodb://localhost/harrykart', { useNewUrlParser: true, useUnifiedTopology: true });
+
+
+const db = mongoose.connection;
+db.on('error', console.error.bind(console, 'connection error:'));
+db.once('open', function () {
+
+    // we're connected!
+
+    //console.log("We are connected bro/sis...");
+
+
+});
+
+// schema is layer. it is top of mongoDB. validation, which data going to the database is control using schema.
+const kittySchema = new mongoose.Schema({
+    name: String
+});
+
+
+// speak method add
+kittySchema.methods.speak = function () {
+    const greeting = "Meow name is " + this.name;
+    console.log(greeting);
+}
+
+
+// kittySchema is converting model Kitten
+// Schema me kosi fild kya rahegi aor
+// model is final complite Schema
+// schema is converting model
+const Kitten = mongoose.model('ParthKitten', kittySchema);
+
+
+const harryKitty = new Kitten({ name: 'harryKitty' });
+const harryKitty2 = new Kitten({ name: 'harryKitty2' });
+//console.log(harryKitty.name); // 'harryKitty'
+//harryKitty.speak();
+
+/*
+output:
+
+harryKitty Name
+Meow name is harryKitty Name
+We are connected bro/sis...
+
+we are connected bro/sis. badame run horaha hai koyki 
+nodejs nonblocking (ayscronoustion)
+*/
+
+/*
+two parameter:
+1->error
+2->harryKitty(objct)
+
+this is save in to the harrykart database
+*/
+harryKitty.save(function (err, harryKitty) {
+    if (err) return console.error(err);
+    harryKitty.speak();
+});
+
+
+harryKitty2.save(function (err, harryKitty2) {
+    if (err) return console.error(err);
+    //harryKitty2.speak();
+});
+
+
+Kitten.find({ name: "harryKitty2" }, function (err, kittens) {
+    if (err) return console.error(err);
+    console.log(kittens);
+})