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/. -- 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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
Of course you can. On Sunday, 27 May 2012 20:34:44 UTC+3, 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/. >-- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To view this discussion on the web visit https://groups.google.com/d/msg/rubyonrails-talk/-/V_d2qxNa_TUJ. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
On Sun, May 27, 2012 at 1:34 PM, brent brent <lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> 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? > > --http://guides.rubyonrails.org/association_basics.html#the-belongs_to-association -- Greg Akins http://twitter.com/akinsgre -- 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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
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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