如何使用mongoose在mongoDB中删除重复项(NodeJS)

const mongoose = require('mongoose');

const userSchema = new mongoose.Schema({
  name: String,
  email: String,
  // 其他字段...
});

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

User.aggregate([
  {
    $group: {
      _id: { name: "$name", email: "$email" },
      duplicates: { $addToSet: "$_id" },
      count: { $sum: 1 }
    }
  },
  {
    $match: {
      count: { $gt: 1 }
    }
  }
], (err, result) => {
  if (err) {
    console.error(err);
    return;
  }

  // 处理重复项
});

result.forEach((group) => {
  const { duplicates } = group;
  const [keepId, ...deleteIds] = duplicates;

  User.deleteMany({ _id: { $in: deleteIds } }, (err) => {
    if (err) {
      console.error(err);
      return;
    }

    console.log(`Deleted ${deleteIds.length} duplicate documents.`);
  });
});