I am going through my first node.js project. I've installed mongodb, have a server.js file, and when I try to run it I get this error
module.js:340 throw err; ^ Error: Cannot find module 'mongodb' 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)
I am quite certain I have mongodb installed, I am new to unix coming from a C# windows background, but I think this is a path not being configured properly?
The error you are getting indicates that the NPM package for MongoDB is not correctly installed.
The fix here depends on how you plan to leverage NPM. The NPM package manager operates has two different modes of operation: local and global.
The first (and default) mode is "local".
If you go to the folder with
server.js you will see a sub-folder named
node_modules. Under that folder will be a
mongodb folder. If that folder is not present, then the
mongodb module is not installed on that path.
To correct this,
cd to that folder and type
npm install mongodb. When the process is done you should have the
node_modules/mongodb folder available.
You can also install MongoDB package globally using
npm install -g mongodb. This is useful if you are using lots of node.js command-line stuff, but less useful if you are deploying the whole thing.
Side Note: there is an evolving standard around
package.json is a standardized way of including all dependencies for a given module. This allows you to run
npm update or
npm install at the root of a project / package and effectively "pull in" all of the dependencies. This greatly simplifies the deployment process and the process of keeping your dependencies in-line.
After trying for some time to install it without success (since I'm new to mongo and node), I was missing the npm link step indeed. So just to summarize, I did this:
With that in place, I could do this in my application file: require('mongodb').
Here are some references, in case you need them: