TypeError: Cannot read property 'lookup' of undefined

[jcochran]

On my mac, the chat example is having trouble locating the 'racer-db-mongo' module.

derby.use(require 'racer-db-mongo') in server/index.coffee

There are no npm install build errors. I have mongo setup on my local machine. I can connect to "derby-chat" in the mongo REPL.

It is included in the package.json file.

{

  "name": "derby-chat-example",

  "description": "Demo chat application for Derby",

  "version": "0.0.0",

  "main": "./server.js",

  "dependencies": {

    "derby": "*",

    "express": "3.0.0beta4",

    "gzippo": ">=0.1.4",

    "racer-db-mongo": "*",

    "connect-mongo": ">=0.1.9"

  },

  "private": true,

  "devDependencies": {

    "coffee-script": ">=1.3.1"

  }

}

======= index.coffee ==========

http = require 'http'

path = require 'path'

express = require 'express'

gzippo = require 'gzippo'

derby = require 'derby'

chat = require '../chat'

serverError = require './serverError'

## SERVER CONFIGURATION ##

expressApp = express()

server = http.createServer expressApp

module.exports = server

derby.use(require 'racer-db-mongo')

store = derby.createStore

  db: {type: 'Mongo', uri: 'mongodb://localhost/derby-chat'}

  listen: server

======= stack trace ==========

$ node server.js

Error requiring server module from `/Users/jcochran/Projects/chat/src/server`

/Users/jcochran/Projects/chat/node_modules/derby/lib/derby.server.js:46

      throw e;

            ^

TypeError: Cannot read property 'lookup' of undefined

    at plugin (/Users/jcochran/Projects/chat/node_modules/racer-db-mongo/lib/index.js:18:27)

    at EventEmitter.module.exports.use (/Users/jcochran/Projects/chat/node_modules/derby/node_modules/racer/lib/plugin.js:39:7)

    at Object.<anonymous> (/Users/jcochran/Projects/chat/src/server/index.coffee:24:9)

    at Object.<anonymous> (/Users/jcochran/Projects/chat/src/server/index.coffee:53:4)

    at Module._compile (module.js:449:26)

    at Object.require.extensions..coffee (/Users/jcochran/Projects/chat/node_modules/coffee-script/lib/coffee-script/coffee-script.js:22:21)

    at Module.load (module.js:356:32)

    at Function.Module._load (module.js:312:12)

    at Module.require (module.js:362:17)

    at require (module.js:378:17)

[Carl-Johan Blomqvist]

I believe you might not have racer-db-mongo installed. You'll have to run npm install inside of the chat folder to make it become installed (or ´npm install racer-db-mongo´ in derby-examples).

[jcochran]

Yes racer-db-mongo is installed.

~ Jason

[Krzysztof Baranowski]

racer-db-mongo 0.3.12-0 and the 0.3.12-1 are broken it seems. Use the previous version:

"racer-db-mongo": "0.3.11"

Chris

[jcochran]

I have changed my package.json file:

{

  "name": "derby-chat-example",

  "description": "Demo chat application for Derby",

  "version": "0.0.0",

  "main": "./server.js",

  "dependencies": {

    "derby": "*",

    "express": "3.0.0beta4",

    "gzippo": ">=0.1.4",

    "racer-db-mongo": "0.3.11",

    "connect-mongo": ">=0.1.9"

  },

  "private": true,

  "devDependencies": {

    "coffee-script": ">=1.3.1"

  }

}

I deleted all the modules and ran npm install. No errors.

I now get the following error after node server.js:

Error requiring server module from `/Users/jcochran/Projects/chat/src/server`

/Users/jcochran/Projects/chat/node_modules/derby/lib/derby.server.js:46

      throw e;

            ^

TypeError: Cannot call method 'replace' of undefined

    at DbMongo.loadConf [as _loadConf] (/Users/jcochran/Projects/chat/node_modules/racer-db-mongo/lib/index.js:58:35)

    at new DbMongo (/Users/jcochran/Projects/chat/node_modules/racer-db-mongo/lib/index.js:34:21)

    at exports.createAdapter (/Users/jcochran/Projects/chat/node_modules/derby/node_modules/racer/lib/adapters/index.js:34:15)

    at new Store (/Users/jcochran/Projects/chat/node_modules/derby/node_modules/racer/lib/Store.js:60:23)

    at EventEmitter.racer.createStore (/Users/jcochran/Projects/chat/node_modules/derby/node_modules/racer/lib/racer.server.js:69:17)

    at Object.<anonymous> (/Users/jcochran/Projects/chat/src/server/index.coffee:26:17)

    at Object.<anonymous> (/Users/jcochran/Projects/chat/src/server/index.coffee:53:4)

    at Module._compile (module.js:449:26)

    at Object.require.extensions..coffee (/Users/jcochran/Projects/chat/node_modules/coffee-script/lib/coffee-script/coffee-script.js:22:21)

[jcochran]

I forgot that I changed the path to the mongo db. I had it localhost. Now it is: localhost/derby-chat.

I now get the following error:

$ node server.js

   info  - socket.io started

Starting cluster with 1 workers in undefined mode

`kill -s SIGUSR2 8191` to force cluster reload

Go to: http://localhost:3002/

module.js:340

    throw err;

          ^

Error: Cannot find module '/Users/jcochran/Projects/chat/src/server'

    at Function.Module._resolveFilename (module.js:338:15)

    at Function.Module._load (module.js:280:25)

    at Module.require (module.js:362:17)

    at require (module.js:378:17)

    at Object.<anonymous> (/Users/jcochran/Projects/chat/node_modules/derby/node_modules/up/lib/worker.js:7:14)

    at Module._compile (module.js:449:26)

    at Object.Module._extensions..js (module.js:467:10)

    at Module.load (module.js:356:32)

    at Function.Module._load (module.js:312:12)

    at Module.runMain (module.js:492:10)

path.existsSync is now called `fs.existsSync`.

[yuklai]

Are you still having this problem?

I was stuck at the issue above where changing racer-db-mongo's version resolved mine, thanks to your original question. So I was able to run the chat sample now. But I never ran into the last error you mentioned.

These are the steps I used:

1. npm install derby-examples
2. cd node_modules/derby-examples/[project]
3. npm install
4. make 
5. node server.js

http://yuklai.blogspot.com/2012/08/running-derbyjs-examples_17.html

[Tyler Renelle]

https://github.com/codeparty/racer-db-mongo/issues/5

[Krzysztof Baranowski]

jcochran and yuklai

Try pointing to chat/lib/server instead of chat/src/server. Compile (of module is in coffeescript) or move js into that directory first if necessary.

Chris

[yuklai]

Just to clarify, I didn't hit the last issue jcochran last pointed out.

But you seem to be right, the server.js might have been mistakenly modified?

This is what I have:

require('derby').run(__dirname + '/lib/server', 3002);

When I changed lib to src it seem to repro the same error that jcochran posted.