自动删除集合中Mongodb中的某一类型文档

const MongoClient = require('mongodb').MongoClient;

// 连接到MongoDB数据库
MongoClient.connect('mongodb://localhost:27017', (err, client) => {
  if (err) {
    console.error('Failed to connect to MongoDB:', err);
    return;
  }

  // 选择要操作的数据库和集合
  const db = client.db('mydb');
  const collection = db.collection('mycollection');

  // 查找要删除的文档
  const query = { type: '某一类型' };
  collection.find(query).toArray((err, docs) => {
    if (err) {
      console.error('Failed to find documents:', err);
      return;
    }

    // 删除文档
    collection.deleteMany(query, (err, result) => {
      if (err) {
        console.error('Failed to delete documents:', err);
        return;
      }

      console.log('Deleted', result.deletedCount, 'documents');
      client.close();
    });
  });
});