p2

 const mongoose = require("mongoose");

mongoose.connect("mongodb://127.0.0.1:27017", {

    dbName: "test",

    useUnifiedTopology: true,

    useNewUrlParser: true

}).then(() => {

    console.log("Connected to database");

}).catch((err) => {

    console.log(err);

});

const studentSchema = new mongoose.Schema({

    name: String,

    rollNo: Number,

    class: String,

    age: Number,

    email: String

});

// Defining Student model

const Student = mongoose.model('Student', studentSchema);

// This step is optional. If the collection doesn't exist, Mongoose will create it automatically when you start saving documents.

// Commenting it out won't affect the functionality.

/*

Student.createCollection().then(function () {

    console.log('Collection is created!');

});

*/

// Export the model

module.exports = Student;

-----------------------------------------------------------------

const mongoose = require("mongoose");

// Schema for collection

const studentSchema = new mongoose.Schema({

    name: String,

    rollNo: String, // Changed type to String

    class: String,

    contactNo: String, // Changed from age to contactNo

    email: String

}, { collection: "students" });

// Exporting model

module.exports = mongoose.model("Student", studentSchema); // Capitalized "Student" to match with the model name

// Creating Schema