如何在mongoose中搜索所有集合中的查询

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 mySchema = new mongoose.Schema({
  // 定义模型的结构
  // ...
});

const MyModel = mongoose.model('MyModel', mySchema);

mongoose.connection.db.collections((error, collections) => {
  if (error) {
    console.error('Error getting collections', error);
    return;
  }

  // 遍历所有集合
  collections.forEach((collection) => {
    // 使用模型执行查询
    collection.find({}, (error, documents) => {
      if (error) {
        console.error('Error querying collection', collection.collectionName, error);
        return;
      }

      // 处理查询结果
      console.log('Documents in collection', collection.collectionName, documents);
    });
  });
});