Flask-RESTful with Firebase随机返回Null

import firebase_admin
from firebase_admin import credentials, db

# 初始化 Firebase
cred = credentials.Certificate('path/to/your/firebase/credentials.json')
firebase_admin.initialize_app(cred, {
    'databaseURL': 'https://your-database-url.firebaseio.com'
})

# 读取数据
ref = db.reference('path/to/data')
data = ref.get()
if data is None:
    print("No data found")
else:
    print(data)

from flask import Flask
from flask_restful import Api, Resource
import asyncio

app = Flask(__name__)
api = Api(app)

class MyResource(Resource):
    async def get(self):
        result = await self.fetch_data_async()
        return {'data': result}

    async def fetch_data_async(self):
        # 模拟异步操作
        await asyncio.sleep(1)
        return {'key': 'value'}

api.add_resource(MyResource, '/data')

if __name__ == '__main__':
    app.run(debug=True)

try:
    data = ref.get()
except Exception as e:
    print(f"Error reading data: {e}")
    data = None

{
  "rules": {
    ".read": "auth != null",
    ".write": "auth != null"
  }
}