It depends whether there are more than one or not. A class is the blueprint of an instance object. Thus a physician class describes one object, of class physician. Has many means one physician has a collection of some other kind of object. Belongs to means a physician can be part of A collection of physicians for another class of object and is therefore the other 'side' if you will.
Blog: http://random8.zenunit.com/ Learn rails: http://sensei.zenunit.com/ On 12/02/2009, at 3:19 AM, Valentino Lun <rails-mailing-l...@andreas-s.net > wrote: > > Dear all > > Refer to http://guides.rails.info/association_basics.html > > Why :physician and :patient some with (s), and some not...? It > actually > refer to the class name or table name? ** really confuse >_<. Can > someone explain it? Is it a convention of rail? Thank you. > > class Physician < ActiveRecord::Base > has_many :appointments > has_many :patients, :through => :appointments > end > > class Appointment < ActiveRecord::Base > belongs_to :physician > belongs_to :patient > end > > class Patient < ActiveRecord::Base > has_many :appointments > has_many :physicians, :through => :appointments > end > > Many thanks > Valentino > -- > Posted via http://www.ruby-forum.com/. > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
