Sinatra App - app.rb changes - http://bit.ly/2V9p6OL

app_4.rb

# Changes to file app.rb
# ...
require 'sinatra/activerecord'
require_relative 'models/speaker'
class ConferenceApp < Sinatra::Base
  # ...
  get '/speakers' do
    @speakers = Speaker.all
    json @speakers
  end
end