Mongodb 的 Mongoose 与 Mongoose

Mongodb 是一种非关系型数据库，而 Mongoose 是用于在 Node.js 中操作 Mongodb 的一个对象模型工具。通过 Mongoose，我们可以更加简便地与 Mongodb 进行交互，实现数据的存储、查询和更新等操作。

npm install mongoose

javascript
const mongoose = require('mongoose');

javascript
mongoose.connect('mongodb://localhost/my_database', { useNewUrlParser: true, useUnifiedTopology: true })
  .then(() => {
    console.log('Connected to Mongodb');
  })
  .catch((error) => {
    console.error('Failed to connect to Mongodb', error);
  });

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

javascript
const newUser = new User({
  name: 'Alice',
  age: 25,
  email: 'alice@example.com'
});
newUser.save()
  .then((result) => {
    console.log('Data saved successfully:', result);
  })
  .catch((error) => {
    console.error('Failed to save data:', error);
  });

javascript
User.find()
  .then((users) => {
    console.log('All users:', users);
  })
  .catch((error) => {
    console.error('Failed to find users:', error);
  });

javascript
User.updateOne({ name: 'Alice' }, { age: 26 })
  .then((result) => {
    console.log('Data updated successfully:', result);
  })
  .catch((error) => {
    console.error('Failed to update data:', error);
  });

javascript
User.deleteOne({ name: 'Alice' })
  .then((result) => {
    console.log('Data deleted successfully:', result);
  })
  .catch((error) => {
    console.error('Failed to delete data:', error);
  });