在Express中哪里可以找到Mongo集合？

npm install mongoose

const mongoose = require('mongoose');

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

const Schema = mongoose.Schema;

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

const MyModel = mongoose.model('MyModel', mySchema);

const doc = new MyModel({ name: 'John', age: 25, email: 'john@example.com' });
doc.save();

MyModel.find({ name: 'John' }, (err, docs) => {
  if (err) {
    console.error(err);
  } else {
    console.log(docs);
  }
});

MyModel.updateOne({ name: 'John' }, { age: 26 }, (err) => {
  if (err) {
    console.error(err);
  } else {
    console.log('Document updated successfully');
  }
});

MyModel.deleteOne({ name: 'John' }, (err) => {
  if (err) {
    console.error(err);
  } else {
    console.log('Document deleted successfully');
  }
});