初めてのActiveRecord

actR.rb

require 'active_record'                                                         
require 'pp'

ActiveRecord::Base.establish_connection(
  adapter: "sqlite3",
  database: "./yatoday.db"
)

class Code < ActiveRecord::Base
  self.table_name = "Code2018_01_05"
  self.primary_key = "code"
end

users = Code.select('code, company')
# users = Code.all
pp users.first.code
pp users.first.company
# 参考url
# https://qiita.com/gctfuji/items/80625a75959591c2b7cd
# https://railsguides.jp/active_record_basics.html