如何摆脱错误：无法在Heroku上找到模块'模型'

Question

I keep receiving this error: "Error: Cannot find module 'models'" on Heroku. I'm using Node.JS. I'm using this Node.JS project .

I copied out the logs from Heroku and put them in a gist due to length.

Here's an excerpt:

2013-08-27T12:56:27.792568+00:00 app[web.1]: module.js:340
2013-08-27T12:56:27.791930+00:00 app[web.1]: 
2013-08-27T12:56:27.792873+00:00 app[web.1]:     throw err;
2013-08-27T12:56:27.792873+00:00 app[web.1]:           ^
2013-08-27T12:56:27.794658+00:00 app[web.1]:     at Function.Module._load (module.js:280:25)
2013-08-27T12:56:27.794658+00:00 app[web.1]: Error: Cannot find module 'models'

I setup my configs on Heroku and have a mongolab mongodb setup and the config val MONGO_URL is setup and the NODE_ENV is set to production.

You can find the site here .

Does anyone know what's going on? Thank you for your help!

Answer 1

You need to set NODE_PATH=lib to heroku's configuration variables.

NODE_PATH tells node where to find modules besides node_modules directory.

Also, you need to tell the app to read env variables in a production environment.

So...

$ heroku config:set NODE_ENV=production
$ heroku config:set NODE_PATH=lib

There is no need to modify any file for a heroku deployment.

Answer 2

You are missing "models" in the "dependencies" property of your package.json. (I checked the github repo).

EDIT: sorry, looks like you are trying to use the module under /lib/models/ folder. So in this line https://github.com/gravityonmars/nodejs-starter/blob/master/index.js#L20 you can do this instead:

require('./lib/models')(app);

Answer 3

You just need to re-install models.

Do npm install models --save then re-deploy your app to Heroku.

This should solve your problem.