I also want to find the association name dynamically from a dynamic object. I was looking for something to help me on this. ' ActiveRecord::Reflection' a nice module to get association info.
Thanks Peter. - Abhi Peter wrote in post #1032176: > On Nov 15, 12:27pm, PandaR1 <fabio.montars...@gmail.com> wrote: >> belongs_to :currency, :class_name => "Measureunit" , :foreign_key => >> "currency_id" >> >> How can I recover the class name from the association name (eg. I have the >> string 'Currency' and I look for >> a method that return 'Measureunit') >> >> I found class_name() and klass() but I can't figure the syntax... > > I believe what you're saying is that you have the Vendor class, and > the name of the association as a string, 'Currency'. You want to look > at The ActiveRecord::Reflection documentation, specifically > reflect_on_association (http://apidock.com/rails/ActiveRecord/ > Reflection/ClassMethods/reflect_on_association). That gives you back > an AssociationReflection, which has a bunch of information for you: > http://apidock.com/rails/ActiveRecord/Reflection/AssociationReflection. > Specifically again, you likely want klass on that, which should return > the class of the association; do be aware that its a little bit more > complex for polymorphic relationships if that's necessary to support. > > So in summary what you likely want is something like > s = "Currency" > association_name = s.underscore # Or > whatever transformation takes your string to your association name > reflection = Vendor.reflect_on_association(association_name) # > Returns the AssociationReflection object > reflection.klass # > Returns the class object, in this case Measureunit > > HTH, > \Peter -- 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 unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscr...@googlegroups.com. To post to this group, send email to rubyonrails-talk@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/27b8fe84844d4d2c5e31a023fcaa314b%40ruby-forum.com. For more options, visit https://groups.google.com/d/optout.
