Cannot create proxy with a non-object as target or handler

[REQUIRED] Environment info

firebase-tools: 7.2.4

macOS: Mojave 10.14

[REQUIRED] Test case

const functions = require('firebase-functions')
const config = functions.config()

console.log(config)

const intialConfig = {
  DB_HOST: config.DB_HOST || 'localhost',
  DB_USER: config.DB_USER || 'root',
  DB_PASSWORD: config.DB_PASSWORD || 'root',
  DB_DATABASE: config.DB_DATABASE || 'database',
}


module.exports = intialConfig

And then initialising mysql

// Intializing SQL here
const mysql = require('mysql')
const config = require('./../../config')

const pool = mysql.createPool({
  host: config.DB_HOST,
  user: config.DB_USER,
  password: config.DB_PASSWORD,
  database: config.DB_DATABASE,
});


// Checking if it was connected sucessfully or not on server startup
pool.getConnection((err, connection) => {
  if (err) {
    console.error('error connecting: ' + err);
    return
  }
  console.log('connected as id ' + connection.threadId);
  connection.release();
  return;
});

Error

TypeError: Cannot create proxy with a non-object as target or handler
    at new Proxied (/Users/varunbindal/.nvm/versions/node/v10.15.3/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:60:22)
    at Proxied.any [as anyValue] (/Users/varunbindal/.nvm/versions/node/v10.15.3/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:475:20)
    at Object.get (/Users/varunbindal/.nvm/versions/node/v10.15.3/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:67:33)
    at Object.<anonymous> (/Users/varunbindal/Desktop/Dating App/backend-self/functions/src/config.js:8:19)
    at Module._compile (module.js:653:30)
    at Object.Module._extensions..js (module.js:664:10)
    at Module.load (module.js:566:32)
    at tryModuleLoad (module.js:506:12)
    at Function.Module._load (module.js:498:3)
    at Module.require (module.js:597:17)

[REQUIRED] Steps to reproduce

Above steps and then deploying by running following command export GOOGLE_APPLICATION_CREDENTIALS='./.keys/admin.keys.json && export dev=true && firebase emulators:start --only functions

[REQUIRED] Expected behavior

It would copy my runtime environment variable

[REQUIRED] Actual behavior

it throws the following error

TypeError: Cannot create proxy with a non-object as target or handler
    at new Proxied (/Users/varunbindal/.nvm/versions/node/v10.15.3/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:60:22)
    at Proxied.any [as anyValue] (/Users/varunbindal/.nvm/versions/node/v10.15.3/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:475:20)
    at Object.get (/Users/varunbindal/.nvm/versions/node/v10.15.3/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:67:33)
    at Object.<anonymous> (/Users/varunbindal/Desktop/Dating App/backend-self/functions/src/config.js:8:19)
    at Module._compile (module.js:653:30)
    at Object.Module._extensions..js (module.js:664:10)
    at Module.load (module.js:566:32)
    at tryModuleLoad (module.js:506:12)
    at Function.Module._load (module.js:498:3)
    at Module.require (module.js:597:17)

[samtstern]

@irohitb ah I found the issue. Your config is not valid. For example you have this config:

{
	"client_url": "http://localhost:3000",
	"db_user": "root",
	"db_password": "rohit123",
	"db_host": "localhost",
	"db_database": "blendtale"
}

But you actually need to always be two-levels deep, for example this fails:

$ firebase functions:config:set db_user="root"

Error: Invalid argument, each config value must have a 2-part key (e.g. foo.bar)

So you’d want to make your config something like:

{
	"datingapp": {
		"client_url": "http://localhost:3000",
		"db_user": "root",
		"db_password": "rohit123",
		"db_host": "localhost",
		"db_database": "blendtale"
	}
}

And then in your config.js file:

const functions = require('firebase-functions')
const config = functions.config().datingapp  // THIS LINE IS DIFFERENT
const dummyConfig = { ...config }

I was able to get your app to run using this:

$ npm run serve-locally

> functions@ serve-locally /tmp/tmp.6T1mQn6kjh/DatingApp-backend/functions
> npm run admin-keys && export dev=true && firebase emulators:start


> functions@ admin-keys /tmp/tmp.6T1mQn6kjh/DatingApp-backend/functions
> export GOOGLE_APPLICATION_CREDENTIALS='./.keys/admin.keys.json'

i  Starting emulators: ["functions","database","hosting"]
✔  functions: Using node@10 from host.
✔  functions: Emulator started at http://localhost:5001
i  database: Emulator logging to database-debug.log
✔  database: Emulator started at http://localhost:9000
i  database: For testing set FIREBASE_DATABASE_EMULATOR_HOST=localhost:9000
i  hosting: Serving hosting files from: public
✔  hosting: Local server: http://localhost:5000
✔  hosting: Emulator started at http://localhost:5000
i  functions: Watching "/tmp/tmp.6T1mQn6kjh/DatingApp-backend/functions" for Cloud Functions...
>  [2019-09-20T18:58:15.358Z] { client_url: 'http://localhost:3000',
>    db_user: 'root',
>    db_password: 'rohit123',
>    db_host: 'localhost',
>    db_database: 'blendtale' }
✔  functions[status]: http function initialized (http://localhost:5001/fir-dumpster/us-central1/status).
✔  functions[invite]: http function initialized (http://localhost:5001/fir-dumpster/us-central1/invite).
✔  All emulators started, it is now safe to connect.
>  [2019-09-20T18:58:15.400Z] error connecting: Error: connect ECONNREFUSED 127.0.0.1:3306

[irohitb]

@samtstern it just contains two endpoint and basic initialisation code (express, middleware and SQL). Can you have quick overview of it? if not, I will try to create a new separate project.