ar.rb

# Require any necessary gems
require 'active_record'
require 'pry'
require 'sqlite3'

ActiveRecord::Base.establish_connection(
  adapter: 'sqlite3',
  database: ':memory:'
)

ActiveRecord::Schema.define do
  create_table :shows, force: true do |t|
    t.string :name
    t.timestamps
  end

  create_table :episodes, force: true do |t|
    t.string :name
    t.belongs_to :show
    t.timestamps
  end
end

class Show < ActiveRecord::Base
  validates :name 
  has_many :episodes
end

class Episode < ActiveRecord::Base
  belongs_to :show, required: true
end

big_bang_theory = Show.create(name: "Big Bang")
seinfeld = Show.create(name: "seinfeld")
one_tree_hill = Show.create(name: "One Tree Hill")

big_bang_theory.episodes.create(name: "Fly to the moon")
big_bang_theory.episodes.create(name: "Jump higher")
big_bang_theory.episodes.create(name: "Ya mon")

binding.pry