node.js - Using handlebars in Cloud Functions for Firebase -


i trying develop prototype using firebase.

i using firebase function. package.json file in function directory is:

{   "name": "functions",   "description": "cloud functions firebase",   "dependencies": {     "express": "^4.15.4",     "firebase-admin": "~4.2.1",     "firebase-functions": "^0.5.7",     "hbs": "^4.0.1"   },   "private": true }

my index.js file looks like:

const functions = require('firebase-functions'); const express = require('express'); const hbs = require('hbs');  var app = express(); app.set('view engine', hbs);  const admin = require('firebase-admin');  admin.initializeapp(functions.config().firebase);  exports.getmessages = functions.https.onrequest((req, res) => {     var abc = admin.database().ref('/messages').on("value", function(snapshot) {         res.send(snapshot.val());       }, function (errorobject) {         console.log("the read failed: " + errorobject.code);       });    });    exports.showmessage = functions.https.onrequest((req, res) => {     res.render('about.hbs' , {       pagetitle : 'about page',       currentyear  : new date().getfullyear()     });   });

while "getmessage" function works fine, error while executing "showmessage" function uses third party module hbs.

function logs show 

error: cannot find module 'hbs'     @ function.module._resolvefilename (module.js:469:15)     @ function.module._load (module.js:417:25)     @ module.require (module.js:497:17)     @ require (internal/module.js:20:19)     @ new view (/var/tmp/worker/node_modules/express/lib/view.js:50:49)     @ eventemitter.app.render (/var/tmp/worker/node_modules/express/lib/application.js:545:12)     @ serverresponse.res.render (/var/tmp/worker/node_modules/express/lib/response.js:938:7)     @ exports.showmessage.functions.https.onrequest (/user_code/index.js:46:9)     @ cloudfunction (/user_code/node_modules/firebase-functions/lib/providers/https.js:26:47)     @ /var/tmp/worker/worker.js:635:7

what you've done here created new express app , set default view engine hbs:

var app = express(); app.set('view engine', hbs);

but doesn't cause cloud functions app. app object created sitting there, unused.

if want use express app cloud functions, you'll have pass along onrequest:

exports.app = functions.https.onrequest(app);

this means you'll have configure endpoints on express app knows url paths service.

if want use handlebars cloud functions, why don't start this sample project firebase team?


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