使用Mongoose迭代数组并从MongoDB返回第一个匹配项

const mongoose = require('mongoose');

mongoose.connect('mongodb://localhost/mydatabase', { useNewUrlParser: true, useUnifiedTopology: true })
  .then(() => {
    console.log('Connected to MongoDB');
  })
  .catch((error) => {
    console.error('Error connecting to MongoDB', error);
  });

const userSchema = new mongoose.Schema({
  items: [String]
});

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

User.findOne({ items: 'apple' }, (error, user) => {
  if (error) {
    console.error('Error finding user', error);
  } else if (user) {
    console.log('First user with "apple" item:', user);
  } else {
    console.log('No user found with "apple" item');
  }
});