Hi,
I have 2 models
class Product < ActiveRecord::Base belongs_to :supplier
class Supplier < ActiveRecord::Base has_many :products
It can happen that a product has record where the supplier_id = 0. When in my views I list all products and one of the columns has the product.supplier.description field. This fails because there is no record where the supplier_id = 0.
The user must set the supplier_id later on in the process but I want to show the word "UNKNOWN" in the supplier.description while the supplier.id is stil zero.
I cannot make a record in the database with supplier_id = 0 
any ideas ?
Jeroen