1. What is activerecord? dynamic orm object relational mapper database people -> Person songs -> Song song row -> <@name="thriller" @year=1982> object

2. How does it make our lives easier? reduces the amount of code that we have to write Song.find_by_year() conventions -> primary_key column Artist -> artists

3. How does it make our lives harder? may not follow conventions...

4. How does it work? Introspects on our tables, writes methods,

5. What questions do we have ActiveRecord::Base module ActiveRecord class Base end end

   class ApplicationRecord < ActiveRecord::Base def self.find_by_id_and_name(id, name) end

    def self.all
        raise 'no method'
    end
   

   end

   class User < ApplicationRecord end

   class Song < ApplicationRecord end 5 minutes..