运行多个Firestore查询并等待所有查询完成

// 导入Firestore模块
const { Firestore } = require('@google-cloud/firestore');

// 创建Firestore实例
const firestore = new Firestore();

// 创建查询函数
function runQuery(query) {
  return new Promise((resolve, reject) => {
    query.get()
      .then(snapshot => {
        const results = [];
        snapshot.forEach(doc => {
          results.push(doc.data());
        });
        resolve(results);
      })
      .catch(error => {
        reject(error);
      });
  });
}

// 创建查询对象
const query1 = firestore.collection('collection1').where('field1', '==', 'value1');
const query2 = firestore.collection('collection2').where('field2', '==', 'value2');

// 创建Promise数组
const promises = [];

// 添加查询Promise对象到数组
promises.push(runQuery(query1));
promises.push(runQuery(query2));

// 等待所有查询完成
Promise.all(promises)
  .then(results => {
    // 处理查询结果
    const query1Results = results[0];
    const query2Results = results[1];
    // ...
  })
  .catch(error => {
    console.error(error);
  });