codetombomb / sinatra-starter-code

Intro-to-Sinatra-2

Announcments

• We will be available next week for project help.

SWABATS

• Define User stories
• Create Entity Relationship Model (ERM)
• Create Database based on ERM
• Create CRUD Endpoints in Sinatra

Getting started with creating a Sinatra API - (The Process)

• Create a Entity Relationship Model
  • This will be something that will evolve over time
  • The more time that you spend on this, the easier it will be to write your code
• Translate ERM to Active Record
  • Create migrations
  • Create models
  • Add ActiveRecord relationship macros
  • Add seed data
  • Test model relationships
• Create CRUD endpoints
  • CREATE rider POST "localhost:9292/riders"
  • READ rider GET "localhost:9292/riders" (Same URL - different endpoint)
  • UPDATE rider PATCH "localhost:9292/riders/:id"
  • DESTROY rider DELETE "localhost:9292/riders/:id"

Domain Model (Relationships)

Researching the domain

• You will need to research and understand your domain at a high level and know what kind of data to store in each table. - Calendar: https://www.motogp.com/en/calendar - Each location has a track. We can model this data too using Ruby. - Riders: https://www.motogp.com/en/riders/MotoGP - What data is associated with each rider? - Teams: https://www.motogp.com/en/teams/MotoGP

ERM: https://lucid.app/lucidchart/f5d8bef7-7bc1-40c5-ab1e-e9caac7de84d/edit?view_items=kWBYMBmO7AJt&invitationId=inv_07e57e63-6b60-4ce2-b4fb-4265d3c37e5c#

Rider

- belongs_to :team
- has_many :rider_races
- has_many :races, through: :rider_races
- has_many :seasons, through: :races (How can we make modify this so that collection returned is uniq)

RiderRace (Join Table - many to many)

- belongs_to :rider
- belongs_to :race

Race

- has_many :rider_races
- has_many :riders, through: :rider_races
- belongs_to :track
- belongs_to :season

Team

• has_many :riders
• has_many :races
• has_many :seasons, through: :riders (How can we make modify this so that collection returned is uniq)

Season

- has_many :races
- has_many :tracks, through: :races
- has_many :riders
- has_many :teams

Track

- has_many :races
- belongs_to :location
- has_many :seasons, through: :races

Location

- has_many :tracks

Now we can code!

Setting up Active Record

• Create Migrations
• Create Models
• Add association macros
• Add Seed data
• Test the associations in a rake console
  • Rider.all
  • Rider.first.races
  • Rider.first.races.last.track
  • Rider.first.races.last.track.location
  • Location.first.tracks
  • Team.first.seasons
  • Team.first.seasons.first.races
  • Rider.first.rider_races
  • Rider.first.rider_races.first.rider_points
  • Rider.first.races.first.track.location

Setting up Sinatra

• Create Controller (Pay attention to naming convention here as well)
  • Inherit from ApplicationController (Base controller)
• Add use <controller> to config.ru file

Additional Endpoints

• Create endpoint for Season winner "localhost:9292/seasons/1/winner"
  • Create a method in the Rider model that returns the total amount of points that rider scored for a given season. Rider#season_points(season)
  • Create a method in the Season model that returns the winner of a particular season. Use the Rider#season_points method as a helper.