Rails - Nov 2005 - Single Table Inheritance

Hello,

I''m trying to build out an app with a couple of tables (people,  
contacts) using single table inheritance. The people table has the  
type field and is for, clients, employees, managers etc. contacts  
simply holds phone numbers and email numbers. I scaffolded out person  
and contact and have created the basic files below. For the life of  
me can''t create a related phone number or email.

in people_controller.rb I have (model below):

  def create_phone
      person = Person.find(params[:id])
      Person.Phone.create
      redirect_to :action => ''edit'', :controller =>
''Phones'', :id =>
@phone
    end

with the idea this can be called from clients or employees.

and I get undefined method `Phone'' for Person:Class

Also if the scaffolded CRUD methods exist in person will they not be  
inherited by client? To get anything to work I had to scaffold client  
out as well.

person.rb
  class Person < ActiveRecord::Base
    has_many :contacts
  end

client.rb
  class Client < Person
  end

contact.rb
  class Contact < ActiveRecord::Base
    belongs_to :person
  end

phone.rb
  class Phone < Contact
  end

Thanks in advance for any help,
Hugh



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Instead of Person.Phone.create, you should have:
person.phone.create

When you capitalize, Ruby assumes that you''re talking about the class  
(Person and Phone) rather than an instance (person and phone).

-- Will

On Sat, 12 Nov 2005 10:57:39 -0500, Hugh Kelsey  
<hugh-EcXoqBC4F/kd5Ot1ntKM6ZqQE7yCjDx5@public.gmane.org> wrote:
> Hello,
>
> I''m trying to build out an app with a couple of tables (people,
> contacts) using single table inheritance. The people table has the
> type field and is for, clients, employees, managers etc. contacts
> simply holds phone numbers and email numbers. I scaffolded out person
> and contact and have created the basic files below. For the life of
> me can''t create a related phone number or email.
>
> in people_controller.rb I have (model below):
>
>   def create_phone
>       person = Person.find(params[:id])
>       Person.Phone.create
>       redirect_to :action => ''edit'', :controller =>
''Phones'', :id =>
> @phone
>     end
>
> with the idea this can be called from clients or employees.
>
> and I get undefined method `Phone'' for Person:Class
>
> Also if the scaffolded CRUD methods exist in person will they not be
> inherited by client? To get anything to work I had to scaffold client
> out as well.
>
> person.rb
>   class Person < ActiveRecord::Base
>     has_many :contacts
>   end
>
> client.rb
>   class Client < Person
>   end
>
> contact.rb
>   class Contact < ActiveRecord::Base
>     belongs_to :person
>   end
>
> phone.rb
>   class Phone < Contact
>   end
>
> Thanks in advance for any help,
> Hugh
>


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