Object-Relational Mapping (ORM) Challenge: E-commerce Back End

Description

Build the back end for an e-commerce site. Take a working Express.js API and configure it to use Sequelize to interact with a MySQL database.

App Demo

• Create Schema and Seed data

• GET routes to return all categories, all products

• GET routes to return a single category, a single product, and a single tag

• POST, PUT, and DELETE routes for categories

• POST, PUT, and DELETE routes for Tags

• POST, PUT, and DELETE routes for products

User Story

AS A manager at an internet retail company
I WANT a back end for my e-commerce website that uses the latest technologies
SO THAT my company can compete with other e-commerce companies

Acceptance Criteria

GIVEN a functional Express.js API
WHEN I add my database name, MySQL username, and MySQL password to an environment variable file
THEN I am able to connect to a database using Sequelize
WHEN I enter schema and seed commands
THEN a development database is created and is seeded with test data
WHEN I enter the command to invoke the application
THEN my server is started and the Sequelize models are synced to the MySQL database
WHEN I open API GET routes in Insomnia for categories, products, or tags
THEN the data for each of these routes is displayed in a formatted JSON
WHEN I test API POST, PUT, and DELETE routes in Insomnia
THEN I am able to successfully create, update, and delete data in my database

Database Models

• Category

  • id

    • Integer
    • Doesn't allow null values
    • Set as primary key
    • Uses auto increment

  • category_name

    • String
    • Doesn't allow null values

• Product

  • id

    • Integer
    • Doesn't allow null values
    • Set as primary key
    • Uses auto increment

  • product_name

    • String
    • Doesn't allow null values

  • price

    • Decimal
    • Doesn't allow null values
    • Validates that the value is a decimal

  • stock

    • Integer
    • Doesn't allow null values
    • Set a default value of 10
    • Validates that the value is numeric

  • category_id

    • Integer
    • References the category model's id

• Tag

  • id

    • Integer
    • Doesn't allow null values
    • Set as primary key
    • Uses auto increment

  • tag_name

    • String

• ProductTag

  • id

    • Integer
    • Doesn't allow null values
    • Set as primary key
    • Uses auto increment

  • product_id

    • Integer
    • References the product model's id

  • tag_id

    • Integer
    • References the tag model's id

Associations

You'll need to execute association methods on your Sequelize models to create the following relationships between them:

• Product belongs to Category, as a category can have multiple products but a product can only belong to one category.

• Category has many Product models.

• Product belongs to many Tag models. Using the ProductTag through model, allow products to have multiple tags and tags to have many products.

• Tag belongs to many Product models.

Instructions on how to run the app

• Add a .env file to the root of the app with the following details

DB_NAME='ecommerce_db'
DB_USER='root'
DB_PW='xxx'