Monday, May 28, 2012
What belongs_to and their counterparts does is create a method to access an existing relationship, the actual relationship is made in the tables themselves by adding model_id columns, for instance:
class User < ActiveRecord::Base
has_one :address
end
class Address < ActiveRecord::Base
belongs_to :user
end
# Shows the address whose addresses.user_id = users.id
User.last.address
# Shows the user whose users.id = addresses.user_id
Address.last.user
If you don't need to access the relationship in the Address model just delete `belongs_to :user`:
class Address < ActiveRecord::Base
end
User.last.address # Shows address
Address.last.user # NoMethodError: undefined method `user'
On Sunday, May 27, 2012 12:34:44 PM UTC-5, Ruby-Forum.com User wrote:
-- Folks
Can a model just have a belongs_to only? or do you have to have a
belongs_to and a has_many or has_one on the other model?
--
Posted via http://www.ruby-forum.com/.
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