insertMany方法在对象中返回insertedIds，而不是在Mongoose 5中返回数组

const mongoose = require('mongoose');

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

// 定义一个简单的模型
const UserSchema = new mongoose.Schema({
    name: String,
    age: Number
});

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

// 使用 insertMany 插入多个文档
async function insertUsers() {
    try {
        const users = [
            { name: 'Alice', age: 30 },
            { name: 'Bob', age: 25 },
            { name: 'Charlie', age: 35 }
        ];

        const result = await User.insertMany(users);
        
        console.log('Inserted Count:', result.insertedCount);
        console.log('Inserted IDs:', result.insertedIds);
    } catch (error) {
        console.error('Error inserting users:', error);
    } finally {
        mongoose.connection.close();
    }
}

insertUsers();