express-mongodb | MongoDB Session Storage for ExpressJS | Runtime Evironment library

In your connectToServer method you just returning the callback. But you actually need to call it as well.

So change this

The error in your title:

I got this error yesterday. It's because you are sending 2 responses to the client at the same time.

Try this solution: Error: EBUSY: resource busy or locked, rmdir

As convert is an async function, and thus returns a promise, replace:

I asked you version in comments because from version 4.4 database tools needs to downloaded separately. Earlier it was part of maongodb installation.

This is from official website.

Starting with MongoDB 4.4, the MongoDB Database Tools are now released separately from the MongoDB Server and use their own versioning, with an initial version of 100.0.0. Previously, these tools were released alongside the MongoDB Server and used matching versioning.

• So go ahead and download database-tools from here :-

https://www.mongodb.com/try/download/database-tools?tck=docs_databasetools

• As you can see in the screenshot, you have all the database tools.

• Open new command prompt and cd to the location where you have downloaded database tools.

• From there run the following command. Replace with database name and with absolute/relative path to track you want to store.

A resolver can optionally accept four positional arguments: (parent, args, context, info).

In order to work just need to specify first argument like this:

You should define function expression first and then use them. That's the reason.

Function expressions in JavaScript are not hoisted, unlike function declarations. You can't use function expressions before you create them:

See Function expression

E.g.

Image src needs absolute path for rendering dynamic image path from the ejs file that you want to generate as a pdf file.

inside your controller, instead of doing this: