'lazyrouter' undefined

[ThatTonybo]

I started a fresh project today, installing all my usual modules (express, body-parser and such). After setting everything up, as usual, I ran into this new error on node server.js`:

C:\Users\ThatTonybo\Desktop\discussion\node_modules\express\lib\application.js:214
  this.lazyrouter();
       ^

TypeError: Cannot read property 'lazyrouter' of undefined
    at use (C:\Users\ThatTonybo\Desktop\discussion\node_modules\express\lib\application.js:214:8)
    at module.exports (C:\Users\ThatTonybo\Desktop\discussion\router.js:3:5)
    at Object.<anonymous> (C:\Users\ThatTonybo\Desktop\discussion\server.js:25:20)
    at Module._compile (internal/modules/cjs/loader.js:689:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
    at Module.load (internal/modules/cjs/loader.js:599:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
    at Function.Module._load (internal/modules/cjs/loader.js:530:3)
    at Function.Module.runMain (internal/modules/cjs/loader.js:742:12)
    at startup (internal/bootstrap/node.js:279:19)

I've done a little investigating and searching, and it seems to occur at ln 214. this.lazyrouter(); in express/lib/application.js.

Is there a quick fix to this?

[wesleytodd]

Hey @ThatTonybo, This looks like you are binding app.use to something other than the express app instance. Maybe if you provide a code example we could help more?

[ThatTonybo]

Not sure where I'd be binding this at all @wesleytodd, could it be due to the fact I'm using app.use deconstructed?

const { use } = app;
use('/', Router); // and so on..

[wesleytodd]

Yep that would do it. Deconstructing changes the context. You would either need to bind use to app, or .call with app.

[ChuckJonas]

Can someone explain why you cannot do this? I'm trying to dynamically register routes & http operation using some metadata and running into this same issue...