Read or Querying the document using mongoose

const mongoose = require('mongoose');
mongoose.connect("mongodb://localhost:27017/newDB",{useNewUrlParser: true})
.then(()=>{
    console.log("connction successful...")
})
.catch((err)=>console.log(err));
const playlistSchema = new mongoose.Schema ({
    // define schema
    name:{
        type : String,
        required : true
    },
    sirname : String,
    email : String,
    role : String,
    active : Boolean,
    date : {
        type: Date,
        default : Date.now
    }
})
// collection creation
// in model("collection name", define schema)
const PlayList = new mongoose.model("PlayList",playlistSchema)
// get all data inside Database
const getDocument = async()=>{
    const result = await PlayList.find();
    console.log(result);
}
getDocument();

connction successful...
[
  {
    _id: new ObjectId("61cbf6b1119213b1dfba2431"),
    name: 'Shreyash',
    sirname: 'KOlhe',
    email: 'shreyashkolhe2001@gmail.com',
    role: 'front-end',
    active: true,
    date: 2021-12-29T05:48:33.350Z,
    __v: 0
  },
  {
    _id: new ObjectId("61cc0946c62a51adf6bc23d9"),
    name: 'Shreyash',
    sirname: 'KOlhe',
    email: 'shreyashkolhe2001@gmail.com',
    role: 'front-end',
    active: true,
    date: 2021-12-29T07:07:50.874Z,
    __v: 0
  },
  {
    _id: new ObjectId("61cc0946c62a51adf6bc23da"),
    name: 'Vaibhav',
    sirname: 'Bandal',
    email: 'vaibhav@gmail.com',
    role: 'front-end',
    active: true,
    date: 2021-12-29T07:07:50.876Z,
    __v: 0
  },
  {
    _id: new ObjectId("61cc0946c62a51adf6bc23db"),
    name: 'Omkar',
    sirname: 'patke',
    email: 'omkar@gmail.com',
    role: 'front-end',
    active: true,
    date: 2021-12-29T07:07:50.877Z,
    __v: 0
  },
  {
    _id: new ObjectId("61cc0946c62a51adf6bc23dc"),
    name: 'amit',
    sirname: 'badhe',
    email: 'amit@gmail.com',
    role: 'front-end',
    active: true,
    date: 2021-12-29T07:07:50.878Z,
    __v: 0
  }
]

Pass query and read document

const getDocument = async()=>{
    const result = await PlayList.find({name: "Shreyash"});
    console.log(result);
}
getDocument();

connction successful...
[
  {
    _id: new ObjectId("61cbf6b1119213b1dfba2431"),
    name: 'Shreyash',
    sirname: 'KOlhe',
    email: 'shreyashkolhe2001@gmail.com',
    role: 'front-end',
    active: true,
    date: 2021-12-29T05:48:33.350Z,
    __v: 0
  },
  {
    _id: new ObjectId("61cc0946c62a51adf6bc23d9"),
    name: 'Shreyash',
    sirname: 'KOlhe',
    email: 'shreyashkolhe2001@gmail.com',
    role: 'front-end',
    active: true,
    date: 2021-12-29T07:07:50.874Z,
    __v: 0
  }
]

Read/Get one field

const getDocument = async()=>{
    const result = await PlayList.find({name: "Shreyash"})
    .select({role:1});
    console.log(result);
}
getDocument();

connction successful...
[
  { _id: new ObjectId("61cbf6b1119213b1dfba2431"), role: 'front-end' },
  { _id: new ObjectId("61cc0946c62a51adf6bc23d9"), role: 'front-end' }
]

Read/Get one field in only one document

const getDocument = async()=>{
    const result = await PlayList.find({name: "Shreyash"})
    .select({role:1})
    .limit(1);
    console.log(result);
}
getDocument();

connction successful...
[
  { _id: new ObjectId("61cbf6b1119213b1dfba2431"), role: 'front-end' }
]

Using Async Method

const getDocument = async()=>{
   try {
         const result = await PlayList.find({name: "Shreyash"})
         .select({role:1})
         .limit(1);
         console.log(result);
     }catch(err){
            console.log(err);
      }  
}
getDocument();