Node convert variable value to variable name for use in destructuring assignment

Question

I have a models folder with an index.js file that looks like the following:

'use strict';
const {Dest1} = require('./destinations/dest1');
const {Dest2} = require('./destinations/dest2');
module.exports = {Dest1, Dest2};

I would like to dynamically load these objects based on a condition. I was thinking it might be interesting to have a middleware function that appends a value to the request that I could use to look up the correct object. I could just dynamically load the path, but I'm curious if this is possible.

Middleware:

 function checkDestination(req,res,next){
     if('destination1' in req.body){
          req.path = 'Dest1'
     }
     next()
 }

Router:

router.get('/', checkDestination, (req,res)=>{
    //convert req.path to variable name here
    const {Dest1} = require('./models')     
})

Symbols?

Yale Newman · Accepted Answer · 2018-04-15 09:09:05Z

1

Ok, decided to go with a hashtable or dictionary look up to avoid repeating a bunch of if statements. If the above is possible, it would be less code but this is pretty clean too.

Middleware:

function checkDestination(req,res,next){
     if('destination1' in req.body){
         req.destination = 'destination1'
     }
     next()
}

HashTable:

const {Dest1} = require('../models')

const destLookUp = {
    destination1:function(destObj){
        return Dest1.create({})
        .then(newDest=>return newDest})
        .catch(error=>{console.log(error)})
    }
}

module.exports = {destLookUp}

Router:

destLookUp[req.destination](destObj)

edited Apr 15, 2018 at 9:09

answered Apr 15, 2018 at 9:03

Yale Newman

1,2414 gold badges14 silver badges25 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Node convert variable value to variable name for use in destructuring assignment

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related