Using Ruby on Rails, can a polymorphic database be created in a few steps (with polymorphic associat
- by Jian Lin
I thought it could be created in a few steps but it can't yet:
rails poly
cd poly
ruby script/generate scaffold animal name:string obj_type:string obj_id:integer
rake:migrate
ruby script/generate scaffold human name:string passportNumber:string
rake:migrate
ruby script/generate scaffold dog name:string registrationNumber:string
rake:migrate
and now change app/models/animal.rb to:
class Animal < ActiveRecord::Base
belongs_to :obj, :polymorphic => true
end
and run
ruby script/server
and go to
http://localhost:3000
I thought on the server then if I create an Michael, Human, J123456
and then Woofie, Dog, L23456
then the database will have entries in the Dogs table and "Humen" or "Humans" table as well as in the Animals table? But only the Animals table has records, Dogs and "Humen" do not for some reason. Is there some steps missing?
