What is Mongoose and how do I use it with Node.js?

What is Mongoose and how do I use it with Node.js?

Mongoose is an Object Data Modeling (ODM) library for MongoDB and Node.js. It provides a schema-based solution to model your application data.

Can you show me a simple example of how to define a schema?

Sure! Here's a basic example:

const mongoose = require('mongoose');

const userSchema = new mongoose.Schema({
  name: String,
  email: String,
  age: Number
});

const User = mongoose.model('User', userSchema);

How do I connect to a MongoDB database using Mongoose?

You can connect to a MongoDB database using Mongoose like this:

mongoose.connect('mongodb://localhost:27017/mydatabase', {
  useNewUrlParser: true,
  useUnifiedTopology: true
});

What are some common methods for querying data?

Some common methods include find(), findOne(), and findById(). For example:

User.find({ age: { $gte: 18 } }, (err, users) => {
  if (err) return handleError(err);
  console.log(users);
});