> Hi All, > > Today, when I debug, I found that I don't understand a very basic > function "super". > > <code> > > class User < ActiveRecord::Base > def self.columns > puts "here....................." > @ret = super > return @ret > end > > end > </code> > > This return only one line of "here.....................". It is very > fine. However, when I called > > My codes are: > <code> > > class User < ActiveRecord::Base > def self.columns > puts "here....................." > super > end > > end > </code> > > The return is what I expected - a list of columns in User, but this > display 18 lines of "here....................." in the console (the > length of "columns" of my User is 17. > > What is the difference between the two super call?
These two methods should both print the line "here....................." to standard output before they return an array of column objects. I'm not sure why you're getting different results. Note that the super keyword has different semantics in Ruby than for example Java -- I'd suggest consulting the Pickaxe or Ruby for Rails if you're confused about its behaviour. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
