mongoose in nodem js

// Step 1: Install Mongoose
npm install mongoose

// Step 2: Require Mongoose in your Node.js application
const mongoose = require('mongoose');

// Step 3: Connect to MongoDB using Mongoose
mongoose.connect('mongodb://localhost:27017/your-database-name', {
  useNewUrlParser: true,
  useUnifiedTopology: true
});

// Step 4: Create a Mongoose Schema
const Schema = mongoose.Schema;
const yourSchema = new Schema({
  // Define your schema fields and their types
  fieldName: {
    type: String,
    required: true
  },
  anotherField: {
    type: Number,
    default: 0
  }
});

// Step 5: Create a Mongoose Model using the Schema
const YourModel = mongoose.model('YourModel', yourSchema);

// Step 6: Create and Save a Document
const instance = new YourModel({
  fieldName: 'example',
  anotherField: 42
});

instance.save((err, savedInstance) => {
  if (err) return console.error(err);
  console.log('Document saved:', savedInstance);
});

// Step 7: Query Documents
YourModel.find({ fieldName: 'example' }, (err, documents) => {
  if (err) return console.error(err);
  console.log('Matching documents:', documents);
});

// Step 8: Update a Document
YourModel.updateOne({ fieldName: 'example' }, { $set: { anotherField: 99 } }, (err, result) => {
  if (err) return console.error(err);
  console.log('Update result:', result);
});

// Step 9: Delete a Document
YourModel.deleteOne({ fieldName: 'example' }, (err) => {
  if (err) return console.error(err);
  console.log('Document deleted');
});

// Step 10: Close the Mongoose Connection
mongoose.connection.close();