Firestore tips

fir.js

// Firestore data from a Cloud Function 

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

exports.getData = functions.https.onRequest((req, res) => {
 const docRef = db.collection('my-collection').doc('doc-id');
 const getDoc = docRef.get()
   .then(doc => {
     if (!doc.exists) {
       console.log('No such document!');
       return res.send('Not Found')
     } 
       console.log(doc.data());
       return res.send(doc.data());
   })
   .catch(err => {
     console.log('Error getting document', err);
   });
});

fir.ts

// Firestore data from a Cloud Function 
-------------
// Async and TS

import * as functions from "firebase-functions";
import * as admin from "firebase-admin";

admin.initializeApp();

const db = admin.firestore();
export {admin, db};

const getDocById =
  functions.https.onRequest(async (
      request:functions.https.Request, response: functions.Response) => {
    if (request.method !== "GET") {
      response.status(400).send("Please send a GET request");
      return;
    }

    if (!request.query.id) {
      response.status(400).send("ID is missing");
      return;
    }

    const ID:string = request.query.id as string;

    const doc =
      await db.collection("my-collection").doc(ID).get();
    let data:any;
    if (!doc.exists) {
      data = null;
    } else {
      data = {...doc.data()};
    }
    response.send(data);
  });

export default getDocById;