Hello Nick,
If we use the createCommet mutation it will throw a TypeError.
It's just a single value in which you access insertIds array with 0 insetead of 1

To https://medium.com/the-ideal-system/graphql-and-mongodb-a-quick-example-34643e637e49

Hi

After cloning and doing yarn install and build, upon running yarn start I am getting this:

PS D:\work\repos\other\graphql-mongodb-example> yarn start
yarn run v1.17.3
$ node dist/index.js
RangeError: Wrong length!
    at validateArrayBufferArguments (D:\work\repos\other\graphql-mongodb-example\node_modules\core-js\modules\_typed-buffer.js:157:39)
    at new ArrayBuffer (D:\work\repos\other\graphql-mongodb-example\node_modules\core-js\modules\_typed-buffer.js:247:29)
    at zlib.js:334:28
    at NativeModule.compile (internal/bootstrap/loaders.js:300:5)
    at NativeModule.compileForPublicLoader (internal/bootstrap/loaders.js:217:8)
    at loadNativeModule (internal/modules/cjs/helpers.js:23:9)
    at Function.Module._load (internal/modules/cjs/loader.js:685:15)
    at Module.require (internal/modules/cjs/loader.js:830:19)
    at require (internal/modules/cjs/helpers.js:68:18)
    at Object.<anonymous> (D:\work\repos\other\graphql-mongodb-example\node_modules\body-parser\lib\read.js:18:12)

Could this be because of a dependency (or dependency of dependency) version?

If I try to build this repo using yarn build or npm run build, I get an error saying

ReferenceError: Unknown plugin "syntax-async-functions"

It looks like a dependency is affecting the process

$ yarn start
yarn run v1.3.2
$ node dist/index.js
{ MongoError: failed to connect to server [localhost:27017] on first connect
at Pool. (/Users/romandeputat/Projects/Test/GraphQL/graphql-mongo/node_modules/mongodb-core/lib/topologies/server.js:326:35)
at Pool.emit (events.js:160:13)
at Connection. (/Users/romandeputat/Projects/Test/GraphQL/graphql-mongo/node_modules/mongodb-core/lib/connection/pool.js:270:12)
at Object.onceWrapper (events.js:255:19)
at Connection.emit (events.js:160:13)
at Socket. (/Users/romandeputat/Projects/Test/GraphQL/graphql-mongo/node_modules/mongodb-core/lib/connection/connection.js:175:49)
at Object.onceWrapper (events.js:255:19)
at Socket.emit (events.js:160:13)
at emitErrorNT (internal/streams/destroy.js:64:8)
at process._tickCallback (internal/process/next_tick.js:152:19)
name: 'MongoError',
message: 'failed to connect to server [localhost:27017] on first connect' }
✨ Done in 1.97s.

https://hub.docker.com/_/mongo/