使用mongoose 5.12从数组中删除对象($pull不起作用)

const mongoose = require('mongoose');

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

// 定义一个简单的模式
const userSchema = new mongoose.Schema({
  name: String,
  hobbies: [{ type: String }]
});

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

// 假设我们要从一个用户的 hobbies 数组中移除 "swimming"
async function removeHobby(userId, hobbyToRemove) {
  try {
    // 使用 $pull 操作符移除指定的爱好
    const result = await User.findByIdAndUpdate(
      userId,
      { $pull: { hobbies: hobbyToRemove } },
      { new: true, useFindAndModify: false }
    );

    console.log('Updated user:', result);
  } catch (error) {
    console.error('Error updating user:', error);
  }
}

// 示例调用
removeHobby('someUserId', 'swimming');