Question

I have implemented single table inheritance for a person class

class Person < ActiveRecord::Base

end


class Teacher < Person

end

class Student < Person

end

class Outsider < Person

end

And the create person seems to work creating Teacher, Student or Person according to the what is chosen in the form.select and the type attribute is added.

However, I seem to have broken the routes

<%= link_to ‘Edit’, edit_person_path(@deal) %> |
<%= link_to ‘Back’, persons_path %>

They seem to point to teacher_path, student_path and outsider_path instead of person_path.

What changes need to be made in the routes?

Answer 1

first generate controllers for your models…

rails generate controller Persons
rails generate controller Teachers
rails generate controller Students
rails generate controller Outsiders

then in routes.rb (rails 3)

resources :persons
resources :teachers
resources :students
resources :outsiders

gives you REST routes

e.g.

persons GET    /persons(.:format) {:action=>"index", :controller=>"persons"}
new_person GET    /person/new(.:format) {:action=>"new", :controller=>"persons"}
edit_person GET    /persons/:id/edit(.:format) {:action=>"edit", :controller=>"persons"}
person GET    /persons/:id(.:format) {:action=>"show", :controller=>"persons"} 
persons POST   /spersons(.:format) {:action=>"create", :controller=>"persons"}    
person PUT    /persons/:id(.:format) {:action=>"update", :controller=>"persons"}    
person DELETE /persons/:id(.:format) {:action=>"destroy", :controller=>"persons"}

the same for teacher, student and outsider

check rake routes
or rake routes | grep teachers