Intro

Gymtastic is a small fitness center with big dreams of helping their community become active and healthy. They've been using an Excel spreadsheet to manage their business, but they'd like your help to build a more powerful system using Python, Django, Django REST Framework and SQL.

So far, they've built some basic models and endpoints for class types, class sessions, customers and bookings. An example of a class type is yoga, and a class session is specific date and time for a yoga class. Bookings link customers to the class sessions they attend.

Please follow the setup steps below and follow the project instructions to help Gymtastic grow their business.

Setup

The project requires Python 3.8 or higher.

Steps:

• Create a Python virtual environment by running python3 -m venv .venv in the project root.
• Activate the environment with source .venv/bin/activate
• Install dependencies with pip install -r requirements.txt
• Run python manage.py migrate to create the database tables in a local SQLite database.
• Create some fixture data by running python manage.py genfixtures.
• Start the web server by running python manage.py runserver.

Congrats! Now you can browse the existing API endpoints at the following URLs:

• http://localhost:8000/api/class_sessions
• http://localhost:8000/api/class_types
• http://localhost:8000/api/customers
• http://localhost:8000/api/bookings

Project Instructions

Please read over the feature descriptions below and pick two for implementation in the REST API. Please don't spend more than 3 hours on this project. For simplicity, don't implement any authentication or permissions. Assume a trusted client will be making all the requests. If you have time to write tests or you like to use TDD, that's nice, but please focus on extending the domain model and implementing the required business logic for the features.

The first step is to clone this repository to your workstation. Once you're done, make sure all your changes are on the main branch and send an email to robert@goteamup.com.

If it's been a while since you've used this project stack, you'd likely want to reference the documentation for Django and Django REST Framework.

In summary:

• Pick two features below and implement them
• Don't spend more than 3 hours on this project
• Don't implement any authentication or permissions
• Tests are always nice, but prioritize data modeling and business logic
• All changes go on main
• Email robert@goteamup.com when complete

Features

Global Booking Limit

Gymtastic loves enthusiastic and active customers, but some have been booking multiple sessions per day, which means less capacity for prospective customers.

Implement logic to return an HTTP error response if a customer attempts to book more than one class session in a single day.

Late Cancels

Gymastic has had a problem lately with customers cancelling at the last moment. This hurts revenue because it leaves little time for another customer to purchase the open slot. They'd like to be able to configure a late cancel cutoff for each class type, and be able to track which bookings are cancelled past the cutoff.

Pointers:

• Gymtastic's app doesn't yet capture a booking status or allow changing it via the REST API. This functionality should be added when building this feature.

Priority Booking

Gymtastic would like to allow some customers to book in advance of other customers. Some classes are popular and can fill up fast, so the business wants to ensure its most valued customers can get spots. Design a system that sets a default for how early customers can book classes before their start time and that allows the business to define segments of customers who can book classes on custom timelines.

Attendance Milestones

Gymtastic would like to recognize customers who are persistent and book classes regularly.

Extend the app to allow defining milestones, so that the business can specify an interval (e.g. 1 month, 1 year, 2 weeks) and a session count. When a customer books a session and hits the count, the system should automatically trigger an congratulatory email to the customer.

Premium Class Types

Gymtastic sees an upselling opportunity. They recently invested in a pool and would like to offer swimming lessons to customers who purchase a premium membership.

Extend the app to model any new domain objects and logic required to support this use case.

Pointers:

• Don't implement any logic related to online payments or transactions. Gymtastic deals only in cash :)

Evaluation Criteria

We'll focus on the following aspects:

• Correctness
• Readability
• Efficiency of SQL queries
• Familiarity with Django and Django REST Framework best practices