Node.js没有在Heroku上部署

Question

I've got a Node.JS+express app running using express-hbs. Everything works when running locally, but fails when deploying to Heroku.

I have tried some of the obvious troubleshooting steps such as:

var port = process.env.PORT || 80;

But the issue still persists.

Here is the full error:

/app/node_modules/express-hbs/lib/hbs.js:90
   var matches = str.match(layoutPattern);
 TypeError: Cannot read property 'match' of undefined
     at ExpressHbs.declaredLayoutFile (/app/node_modules/express-hbs/lib/hbs.js:90:21)
     at parseLayout (/app/node_modules/express-hbs/lib/hbs.js:476:27)
     at /app/node_modules/express-hbs/lib/hbs.js:598:7
     at getSourceTemplate (/app/node_modules/express-hbs/lib/hbs.js:572:16)
     at compileFile (/app/node_modules/express-hbs/lib/hbs.js:594:5)
     at /app/node_modules/express-hbs/lib/hbs.js:647:16
     at ReaddirpReadable.<anonymous> (/app/node_modules/express-hbs/lib/hbs.js:196:17)
     at emitNone (events.js:106:13)
     at ReaddirpReadable.emit (events.js:208:7)
     at endReadableNT (/app/node_modules/readable-stream/lib/_stream_readable.js:1010:12)
 npm ERR! code ELIFECYCLE
 npm ERR! errno 1

Locally I am running Node.js v6.11.4 and NPM v3.10.10, both of which are included in package.json

Answer 1

This may be an issue with you package-lock.json file getting out of sorts... Especially, since the error is originating from within your express-hbs node module:

app/node_modules/express-hbs/lib/hbs.js:90

Maybe you could try deleting your local package-lock.json file, as well as your node_modules directory, and then try reinstalling your dependent libraries?

For example, once your package-lock.json and node_modules have been deleted:

rm package-lock.json
rm -rf node_modules

Try reinstalling your project's dependent npm libraries with an: npm install

Once these libraries have been reinstalled, you will have a fresh up-to-date package-lock.json file, since this file is autogenerated and serves almost like the " source of truth " for the building of your project to others. Now try pushing and publishing your code to Heroku and see if this resolves your issue.

Hopefully that helps!