Written by Jan Kaiponen
on 

New Project, Callback Hell

I have been working a couple of days on my new project, which is to solve a realistic business problem.

This is a server app/API for a Coffee Shop, which sells monthly coffee memberships.

For a single montly payment, the customer gets free coffee up to the following limits:

Given this is a very simple problem to solve; I have already ran into issues with complexity called callback-hell.

Promises

I learned about how promises work, as I knew this can make the source code more easy to read and maintain.

The prescribed course tutorials use callbacks entirely. I realised that I will have to restructure my code to use Promises to keep it more maintainable.

Mongoose Models

In order to keep my code clean, I needed to implement many virtual fields to my Mongoose models. I also learned how these are (and are not) populated when Mongoose returns queried data.

Making my project more simple

I have rescoped and redefined the MVP several times during this project to keep to my budget and schedule. However, I do want to keep and implement the business rules (requirements) that I set for myself and the final project.