packtpublishing/node.js-14-cookbook

Node Cookbook - Fourth Edition, Published by Packt

node.js-14-cookbook's Issues

Chapter 7 - MongoDB Recipe: listTasks find().each() is broken

Hello,

So when running the recipe under Node (be 14 or the latest), the recipe will fail to execute.

Under Node 14 I'm obtaining the following error message:

New Task:  Walk the dog
(node:4973) UnhandledPromiseRejectionWarning: TypeError: tasks.find(...).each is not a function
    at listTasks (/home/heinervg/dev/nodejs-learning/mongodb-app/tasks.js:39:16)
    at /home/heinervg/dev/nodejs-learning/mongodb-app/tasks.js:33:7
    at /home/heinervg/dev/nodejs-learning/mongodb-app/node_modules/mongodb/lib/utils.js:349:28
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:4973) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:4973) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

While under Node 19, the output is different:

New Task:  Walk the dog
/home/heinervg/dev/nodejs-learning/mongodb-app/tasks.js:39
  tasks.find().each((err, doc) => {
               ^

TypeError: tasks.find(...).each is not a function
    at listTasks (/home/heinervg/dev/nodejs-learning/mongodb-app/tasks.js:39:16)
    at /home/heinervg/dev/nodejs-learning/mongodb-app/tasks.js:33:7
    at /home/heinervg/dev/nodejs-learning/mongodb-app/node_modules/mongodb/lib/utils.js:349:28
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)

I checked my code vs what's on GitHub and it's exactly the same, I even copied and pasted it in case I was messing up something and VSCode reported no changes.

I'm running everything under WSL2 through an Ubuntu image running on Windows 11. So far everything else has worked perfectly except this recipe.