BACKEND CODING CHALLENGE

This is the coding challenge for people who applied to a backend developer position at SeQura. It's been designed to be a simplified version of the same problems we deal with.

Setup

To initialize the project just clone the repo. Open a terminal and go to your project folder. Then run the following command to install all dependencies

bundle install

After that run the database migrations

bin/rails db:migrate

And populate orders table

bin/rails db:seed

Last but not least, bring up the server

rails s

Now you should be ready to test the project.

API Endpoints

There are only two available API endpoints at the moment. The first one is when provided a merchant_id, you will see the disbursements for desired merchant.

{base_url} /api/v1/disbursement/:merchant_id

In this case the base_url would be your localhost.

{base_url} /api/v1/disbursement

In case you do not provide a merchant_id, you will get all the disbursements for all merchants.

Project

I want to highlight some of the decisions I made regarding the structure of the challenge and also the missing parts.

• First of all, I decided to use Ruby in order to starting to get used to it for the future and also to learn something new (really enjoyed it).
• Created four models to interact with the database (Merchant, Shopper, Order, Disbursement).
• Populated just the orders database.
• Created just one controller (DisbursementController) to handle the index and show functions connected to the provided endpoints.
• Created a service (DisbursementCalculator) to separate the calculations responsibility.
• Created a job (CalculateDisbursementJob) to execute every day at certain time so it calculates disbursements on the background.

Missing

• I was not able to connect the job to execute every day at certain time. I wanted it to be executed every day at 5am so when the day starts we had the disbursements available.
• I wanted to populate all the tables but decided not to because it was taking me too much time.

Tests

We can ran all tests with the command

bin/rails test

or by passing the bin/rails test command the filename containing the test cases. Example:

bin/rails test tests/models/example_test.rb

Credits

Proper credits to the SeQura development team, thank you for the challenge and the opportunity.