SA-01: Code Challenge - Coffee Shop (Object Relationships) [COMPULSORY]

Due May 20 by 11:59pm
Points 15
Submitting a website url
Available after May 15 at 10am

**Project Overview

For this assignment, we'll be working with a Coffee shop-style domain. We have three models: Coffee, Customer, and Order. For our purposes, a Coffee has many Orders, a Customer has many Orders, and an Order belongs to a Customer and to a Coffee. Coffee - Customer is a many-to-many relationship. Note: You should draw your domain on paper or on a whiteboard before you start coding. Remember to identify a single source of truth for your data.

Project Setup & Folder Structure

Create a new repository
- Name it (for example) coffee-shop-challenge.
- Initialize with a README.md.
Clone locally
Initialize your Python environment
Define your folder & file layout
Initial commit

☕ Coffee-Shop Challenge: Requirements

1. Models & Initializers

Customer

__init__(self, name)
- Store a name (must be a str, 1–15 characters).
Property name
- Getter returns the customer’s name.
- Setter enforces str type and 1–15 character length.

Coffee

__init__(self, name)
- Store a name (must be a str, at least 3 characters).
Property name
- Getter returns the coffee’s name.
- Immutable once initialized.

Order

__init__(self, customer, coffee, price)
- Accepts a Customer instance, a Coffee instance, and a price (float, 1.0–10.0).
Property price
- Getter returns the order price.
- Immutable once initialized; enforces type and range.

2. Object Relationships

Order.customer → returns the Customer instance (type-checked)
Order.coffee → returns the Coffee instance (type-checked)
Customer.orders() → all Order instances for that customer
Customer.coffees() → unique list of Coffee instances they’ve ordered
Coffee.orders() → all Order instances for that coffee
Coffee.customers() → unique list of Customer instances who’ve ordered it

3. Aggregates & Associations

Customer.create_order(coffee, price)
Instantiate a new Order, link it to this customer and the given coffee.
Coffee.num_orders()
Total count of orders for this coffee (0 if none).
Coffee.average_price()
Mean of all order prices for this coffee (0 if none).

4. Bonus (Optional)

Customer.most_aficionado(coffee) (classmethod)
Return the Customer Who’s spent the most on the given coffee (or None If no orders)

Happy Coding

Keep in mind that 165 students have already been assessed using this rubric. Changing it will affect their evaluations.

SA: Mock Code Challenge - Coffee Shop (Object Relationships) Rubric

Criteria	Ratings	Pts
Customer initializer & name property Edit criterion description	2 pts Points Initializer and name getter/setter both enforce type and length correctly (1–15 chars) and setter works 1 pts Partial Partial enforcement: either type or length checks are missing, or the setter/getter is only partly functional 0 pts No Marks No implementation or completely incorrect	pts 2 pts --
Coffee initializer & name property Edit criterion description	2 pts Full Marks Initializer and name getter enforce type and ≥3-char length correctly, and name is immutable after init 1 pts Partial Partial enforcement: type or length check missing, or immutability not enforced 0 pts No Marks No implementation or completely incorrect	pts 2 pts --
Order initializer & price property Edit criterion description	2 pts Full Marks Initializer takes Customer, Coffee, float price (1.0–10.0) and price is immutable 1 pts Partial Partial enforcement: wrong type/range checks or immutability not enforced 0 pts No Marks No implementation or completely incorrect	pts 2 pts --
Relationship methods & properties Edit criterion description	4 pts Full Marks All `Order.customer`, `Order.coffee`, `Coffee.orders()`, `Coffee.customers()`, `Customer.orders()`, `Customer.coffees()` work correctly and return proper unique lists 3 pts Partial One method has minor bug (e.g. duplicates or wrong type), but the rest work 2 pts Partial Some methods work correctly, others missing or majorly flawed 1 pts Partial Only one or two relationship methods implemented correctly 0 pts Partial No relationship methods are implemented	pts 4 pts --
Aggregate/association methods Edit criterion description	3 pts Full Marks Customer.create_order()`, `Coffee.num_orders()`, and `Coffee.average_price()` are all correct 2 pts Partial One of the three methods is missing or has a bug 1 pts Partial Aggregate methods exist but are mostly incorrect 0 pts No Marks No aggregate/association methods implemented	pts 3 pts --
Bonus: Customer.most_aficionado(coffee) Edit criterion description	2 pts Full Marks Correctly returns the customer who spent the most or `None` if no orders 1 pts Partial Method exists but fails on edge cases (e.g. ties or empty orders) 0 pts No Marks Not implemented or completely incorrect	pts 2 pts --