Python Object Relations Assessment

For this assignment, we'll be working with a Yelp-style domain. We have three models - Restaurant, Customer, and Review. For our purposes, a Restaurant is connected to a Customer only if that customer writes a review about the restaurant.

If you are not sketching out your domain, and thinking about single source of truth, you are doing it wrong :(

You can read about how to submit the assignment at the end.

Topics

• Classes vs Instances
• Object Relationships
• Lists and List Methods
• Class Methods

Notes

Your goal is to build out all of the methods listed in the deliverables.

Remember that to run your code, you can run python -i environment.rb. You'll be able to test out the methods that you write from there. Take a look at that file to see how you can pre-define variables and create object instances, rather than manually doing it each time.

To Submit - once you've completed all the deliverables, please copy/paste your three class definitions into the solution.rb file. Please don't submit the lab until we give you the signal.

Deliverables

Build the following methods on the Customer class

• Customer.all()
  • should return all of the customer instances
• Customer.find_by_name(name)
  • given a string of a full name, returns the first customer whose full name matches
• Customer.find_all_by_first_name(name)
  • given a string of a first name, returns an list containing all customers with that first name
• Customer.all_names()
  • should return a list of all of the customer full names
• Customer#add_review(restaurant, content)
  • given a restaurant object and some review content (as a string), creates a new review and associates it with that customer and restaurant. A Review belongs to a Customer and belongs to a Restaurant

Build out the following methods on the Review class

• Review.all()
  • returns all of the reviews
• Review#customer
  • returns the customer object for that given review
• Review#restaurant
  • returns the restaurant object for that given review

Build out the following methods on the Restaurant class

• Restaurant.all()
  • returns a list of all restaurants
• Restaurant.find_by_name(name)
  • given a string of restaurant name, returns the first restaurant that matches
• Restaurant#reviews
  • returns an array of all reviews for that restaurant
• Restaurant#customers
  • returns all of customers who have written reviews of that restaurant. A Restaurant has many Customers and a Customer has many Restaurants

Submitting your code challenge

We'll be submitting the form using the gist gem. The gist gem allows you to quickly make and get a link to a short github repository.

1. Place all of your code in solution.py
2. Install gist, by going to your terminal and typing gem install gist or brew install gist.
3. From the folder of your assessment, type into the terminal gist solution.py
4. (Optional) If you need to login with your credentials, simply run gist --login, and then when logged in type gist solution.py into your terminal again.
5. Running gist solution will return a link to your gist.
6. Go to this google form, and enter your name and a link to the gist.