错误：找不到模块“ mongodb”

Question

I'm using Visual Studio with node.js tools. My project won't start up and it's throwing the error.

Error: Cannot find module 'mongodb'

This is a package I had previously installed, I figured maybe the global package directory might be a useful place to look, does anyone know where this is located?

I've narrowed it down to when I

require('mongoose')

I have the mongoose package, I have mongodb installed (correctly I think, and not the package but the actual thing, this stuff confuses the hell out of me), so not sure why it's complaining.

Answer 1

Quick Fix:

The mongoose package.json file lists mongodb as a dependency. The mongodb package will be in the mongoose package's node_modules directory. This won't be a global install problem...

The easiest fix to try is to run this in the project's root directory:

npm install mongoose

If you require a specific version of mongoose , use this format:

npm install mongoose@x.y.z

...where xyz is the version, like 3.8.8 .

If the Quick Fix Fails

There's a good chance that the mongodb build failed during mongoose installation and will fail again because of an incompatible Windows VisualStudio/SDK version or a missing Python dependency. This is based upon personal experience and from helping other Windows users with npm install failures...

If there are errors on a second try and they are from the mongodb build, the messages will usually be clear about what dependency isn't being met and what you can install to fix things. If not, you can check the node-gyp dependency requirements and verify you meet those requirements.