Mongo Db with cli cmd

md

## MongoDb is a document database or nosql database with no relation like firebase db

## Install Mongodb and mongodb compass app

## add the mongod path into environment variables

## cheack mongo db version
```
mongod --version
```
## Now you need to add the default directory for mongod
```
mkdir c:/dir
mkdir c:/dir/db
```
## open mongo shell
```
mongo
```

## show mongo databases in shell
```
show dbs
```
## use db
```
use db-name
```

## Run Mongodb server
```
mongod
```
#### server will open in: 
```
localhost:27017
```


## install mongoose on any project
```
npm i mongoose
```


## import mongoose in project
```
const mongoose = require("mongoose");
```

## create mongodb database and connect to the database
```
mongoose
    .connect("mongodb://localhost/playground", {
        useNewUrlParser: true
    })
    .then(() => console.log("Connect to mongo db..."))
    .catch(err => console.error("could not connect to mongo db ", err));
```

### NOTE: Database won't be visible until any data inserted into database

### For creating any data table in Nosql what is called as Schema
```

const course_Schema = new mongoose.Schema({
  name: String,
  author: String,
  tags: [String],
  date: {
    type: Date,
    default: Date.now
  },
  isPublished: Boolean
});
```
### We need to create a data model of the table/schema
```
const Course = mongoose.model("Course", course_Schema); //Course + s is the collection/table name 
```
### For Inserting any data into table using Async funtion and await
```
async function createCourse(_name, _author, _tags, _isPublished) {
  const course = new Course({
    name: _name,
    author: _author,
    tags: _tags,
    isPublished: _isPublished
  });

  const result = await course.save();
  console.log(result);
}
```
calling the function
```
createCourse("node", "Mosh", ["node", "rest"], true);
```