FAQ: Setting up a Server with HTTP - Interacting with a Database

Frequently Asked Questions Uncategorized
1

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This community-built FAQ covers the “Interacting with a Database” exercise from the lesson “Setting up a Server with HTTP”.

Paths and Courses
This exercise can be found in the following Codecademy content:

Learn Node.js

FAQs on the exercise Interacting with a Database

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2

I was reviewing the function makeDatabaseRequest, in this function fs.readFile has an anonymous function as its third argument where this function has an argument of payload, my doubt is what is this payload and where does it come from? The code of the makeDatabaseRequest is pasted below for reference. Please help me solve this doubt.

function makeDatabaseRequest(type, cb) {

fs.readFile(’./database.json’, ‘utf8’, function (err, payload) {

if (err) {

  cb(err, null); 

} else {

  cb(null, JSON.parse(payload)[type]);

}

});

}

3

playload is the result of the success readFile operation - information inside database.json
fs.readFile - runs asynchronous and get error-first callback function as the third argument. This callback function has two parameters -error and playload - the result of the success readFile operation.

2 Likes
4

What are we supposed to type inside the terminal?

When I type node app.js, I only receive the console.log(Server is listening on http:::4001) message.
Are we supposed to see more?

1 Like
5

this exercise doesnt seem to bring the desired result which i guess should be to console log data from the json file, or am i wrong?

1 Like
6

I have the same issue i don’t think the server is working the right way

7

Yep. The exercise is completely broken. Skipping ahead.
(Even by copying “the solution”, and following the correct steps, the console still awaits input and does nothing upon starting up app.js.)