Gcp/Firebase/Firestore/async

firestoreをasyncを使って取得する

asyncを使わないパターン

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

 .region('asia-northeast1')
 .https.onRequest((request, response) => {
 admin.firestore().collection('scores')
       .orderBy('maxKanaSpeed', 'desc')
       .limit(50)
       .get()
       .then((snapshot) =>
     {
       var scores = snapshot.docs.map(x => x.data());
       var json = JSON.stringify(scores);
       response.send("json" + json);
 });

});