Firebase云函数返回2个集合的数据

const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp();

exports.getCombinedData = functions.https.onRequest((req, res) => {
  const db = admin.firestore();

  // 查询第一个集合的数据
  db.collection('collection1').get()
    .then(snapshot1 => {
      const data1 = [];
      snapshot1.forEach(doc => {
        data1.push(doc.data());
      });

      // 查询第二个集合的数据
      db.collection('collection2').get()
        .then(snapshot2 => {
          const data2 = [];
          snapshot2.forEach(doc => {
            data2.push(doc.data());
          });

          // 整合数据
          const combinedData = {
            collection1: data1,
            collection2: data2
          };

          // 返回数据
          res.json(combinedData);
        })
        .catch(error => {
          console.log('Error getting collection2 documents: ', error);
          res.status(500).send('Internal Server Error');
        });
    })
    .catch(error => {
      console.log('Error getting collection1 documents: ', error);
      res.status(500).send('Internal Server Error');
    });
});