Object Relations Code Challenge - Articles

For this assignment, you will be working with a Magazine domain.

We have three models: Author, Article, and Magazine.

For our purposes, an Author has many Articles, a Magazine has many Articles, and Articles belong to both Author and Magazine.

Author - Magazine 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.

Topics

• Classes and Instances
• Class and Instance Methods
• Variable Scope
• Object Relationships
• lists and list Methods

Instructions

To get started, run pipenv install while inside of this directory.

Build out all of the methods listed in the deliverables. The methods are listed in a suggested order, but you can feel free to tackle the ones you think are easiest. Be careful: some of the later methods rely on earlier ones.

Writing error-free code is more important than completing all of the deliverables listed - prioritize writing methods that work over writing more methods that don't work. You should test your code in the console as you write.

Similarly, messy code that works is better than clean code that doesn't. First, prioritize getting things working. Then, if there is time at the end, refactor your code to adhere to best practices. When you encounter duplicated logic, extract it into a shared helper method.

Before you submit! Save and run your code to verify that it works as you expect. If you have any methods that are not working yet, feel free to leave comments describing your progress.

Deliverables

Write the following methods in the classes in the files provided. Feel free to build out any helper methods if needed.

Initializers, Readers, and Writers

Author

• Author __init__(self, name)
  • An author is initialized with a name, as a string.
• Author get_name()
  • Returns the name of the author

Magazine

• Magazine __init__(self, name, category)
  • A magazine is initialized with a name as a string and a category as a string
• Magazine get_name()
  • Returns the name of this magazine
• Magazine get_category()
  • Returns the category of this magazine

Article

• Article __init__(self, author, magazine, title)
  • An article is initialized with an author as an Author object, a magazine as a Magazine object, and title as a string.
• Article get_title()
  • Returns the title for that given article

Object Relationship Methods

Article

• Article get_author()
  • Returns the author for that given article
• Article get_magazine()
  • Returns the magazine for that given article

Author

• Author get_articles()
  • Returns an list of Article instances the author has written
• Author get_magazines()
  • Returns a list of Magazine instances for which the author has contributed to

Associations and Aggregate Methods

Author

• Author add_article(magazine, title)
  • Given a magazine (as Magazine instance) and a title (as a string), creates a new Article instance and associates it with that author and that magazine.
• Author topic_areas()
  • Returns a list of strings with the categories of the magazines the author has contributed to

Magazine

• Magazine article_titles()
  • Returns an list strings of the titles of all articles written for that magazine
• Magazine get_contributors()
  • Returns an list of Author instances who have written for this magazine