在Firebase云函数中返回地图为空

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

exports.getMaps = functions.https.onRequest(async (req, res) => {
  try {
    const snapshot = await admin.firestore().collection('maps').get();
    const maps = snapshot.docs.map(doc => doc.data());
    res.status(200).json(maps);
  } catch (error) {
    console.error('Error fetching maps:', error);
    res.status(500).send('Internal Server Error');
  }
});

service cloud.firestore {
  match /databases/{database}/documents {
    match /maps/{map} {
      allow read: if request.auth != null;
    }
  }
}

{
  "maps": [
    {
      "id": "1",
      "name": "Map 1",
      "location": {
        "lat": 37.7749,
        "lng": -122.4194
      }
    },
    {
      "id": "2",
      "name": "Map 2",
      "location": {
        "lat": 40.7128,
        "lng": -74.0060
      }
    }
  ]
}

exports.getMaps = functions.https.onRequest(async (req, res) => {
  try {
    const snapshot = await admin.firestore().collection('maps').get();
    const maps = snapshot.docs.map(doc => doc.data());
    res.status(200).json(maps);
  } catch (error) {
    console.error('Error fetching maps:', error);
    res.status(500).send('Internal Server Error');
  }
});

exports.getMaps = functions.https.onRequest(async (req, res) => {
  try {
    const snapshot = await admin.firestore().collection('maps').get();
    console.log('Snapshot:', snapshot);
    const maps = snapshot.docs.map(doc => doc.data());
    res.status(200).json(maps);
  } catch (error) {
    console.error('Error fetching maps:', error);
    res.status(500).send('Internal Server Error');
  }
});