Question

I just started using rails,

I have a model generated with a set of 3 attributes, and I have controllers and views written for it, now I need another database or a model which has 4 attributes, where the second and the third attributes of the new model have to be linked to the 2 attributes in the original database, how do I create or generate this model?

Primary database (Books)

BookID, Bookname , no.of.books

Secondary database (Usage)
Customername, Bookname , noofbooks_rented.

The changes have to reflect on the original database.
Thanks for the help in advance..

Answer 1

In your books model

class BooK < ActiveRecord::Base
belongs_to :customer

def count_books
  //count all books on a particular user
end

end

In your customer model

class Customer <ActiveRecord::Base
has_many :books
end