calling model.dup with ruby 2.0.0 calls private method

[phoet]

switching my rails 3.2.12 project to ruby 2.0.0 fails a test:

NoMethodError:
  private method `initialize_dup' called for #<Event:0x007fe06c809428>

this is the code that gets called: https://github.com/phoet/on_ruby/blob/master/app/models/event.rb#L86

looks like initialize_dup is now a private method :sadpanda:

[sikachu]

Would you mind pasting in the whole stack trace?

[phoet]

rspec swallows a lot of it, but this is the stack from the rails console:

NoMethodError: private method `initialize_dup' called for #<Event:0x007fed83101c60>
    from /Users/paule/.rvm/gems/ruby-2.0.0-p0@on_ruby/gems/activemodel-3.2.12/lib/active_model/attribute_methods.rb:404:in `method_missing'
    from /Users/paule/.rvm/gems/ruby-2.0.0-p0@on_ruby/gems/activerecord-3.2.12/lib/active_record/attribute_methods.rb:149:in `method_missing'
    from /Users/paule/.rvm/gems/ruby-2.0.0-p0@on_ruby/gems/activemodel-3.2.12/lib/active_model/validations.rb:179:in `dup'
    from /Users/paule/.rvm/gems/ruby-2.0.0-p0@on_ruby/gems/activerecord-3.2.12/lib/active_record/base.rb:562:in `dup'
    from /Users/paule/Documents/rails/on_ruby/app/models/event.rb:86:in `duplicate!'
    from (irb):1
    from /Users/paule/.rvm/gems/ruby-2.0.0-p0@on_ruby/gems/railties-3.2.12/lib/rails/commands/console.rb:47:in `start'
    from /Users/paule/.rvm/gems/ruby-2.0.0-p0@on_ruby/gems/railties-3.2.12/lib/rails/commands/console.rb:8:in `start'
    from /Users/paule/.rvm/gems/ruby-2.0.0-p0@on_ruby/gems/railties-3.2.12/lib/rails/commands.rb:41:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>'

[sikachu]

It's indeed a legit bug. Do you want to submit a pull request with a test case for this?

$ rails c
Loading development environment (Rails 3.2.12)
irb(main):001:0> User.create name: 'foo'
   (0.0ms)  begin transaction
  SQL (3.4ms)  INSERT INTO "users" ("created_at", "name", "updated_at") VALUES (?, ?, ?)  [["created_at", Mon, 25 Feb 2013 16:00:43 UTC +00:00], ["name", "foo"], ["updated_at", Mon, 25 Feb 2013 16:00:43 UTC +00:00]]
   (0.7ms)  commit transaction
=> #<User id: 1, name: "foo", created_at: "2013-02-25 16:00:43", updated_at: "2013-02-25 16:00:43">
irb(main):002:0> User.first.dup
  User Load (0.2ms)  SELECT "users".* FROM "users" LIMIT 1
NoMethodError: private method `initialize_dup' called for #<User name: "foo", created_at: nil, updated_at: nil>
    from /Users/sikachu/.rvm/gems/ruby-2.0.0-p0/gems/activemodel-3.2.12/lib/active_model/attribute_methods.rb:404:in `method_missing'
    from /Users/sikachu/.rvm/gems/ruby-2.0.0-p0/gems/activerecord-3.2.12/lib/active_record/attribute_methods.rb:149:in `method_missing'
    from /Users/sikachu/.rvm/gems/ruby-2.0.0-p0/gems/activemodel-3.2.12/lib/active_model/validations.rb:179:in `dup'
    from /Users/sikachu/.rvm/gems/ruby-2.0.0-p0/gems/activerecord-3.2.12/lib/active_record/base.rb:562:in `dup'
    from (irb):2
    from /Users/sikachu/.rvm/gems/ruby-2.0.0-p0/gems/railties-3.2.12/lib/rails/commands/console.rb:47:in `start'
    from /Users/sikachu/.rvm/gems/ruby-2.0.0-p0/gems/railties-3.2.12/lib/rails/commands/console.rb:8:in `start'
    from /Users/sikachu/.rvm/gems/ruby-2.0.0-p0/gems/railties-3.2.12/lib/rails/commands.rb:41:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>'
irb(main):003:0> 

[phoet]

sure, give me a minute

[flop]

Seems to be the same thing as #7291 It's merged in 3-2-stable but it has not been released yet

[phoet]

that would explain why i am not able to reproduce the error in the tests :smile:

[sikachu]

Oh, good call. Since that was merged, I'm closing this. Thanks guys! :D

[sikachu]

(Oh, and I'll make sure we get another 3.2.x RC soon. :smile:)

[n8gard]

I just got this too. Rails 3.2.12 and Ruby 2.0.0-p0.

[sikachu]

@njnorrgard please wait for 3.2.13 or point your Gemfile to 3-2-stable for now.

[moomerman]

Any idea when this will get released? Its the only thing in Rails that breaks for me with Ruby 2.0

[phoet]

this should do it: https://rubygems.org/gems/rails/versions/3.2.13.rc2

[carlosantoniodasilva]

Yes, 3.2.13.rc2 is the version to use with 2.0, the final 3.2.13 should be released soon.

[moomerman]

Works perfectly. Thanks!

[jrep]

This seems to be back again, using Ruby 2.1.0, Rails 4.0.2 . See StackOverflow

[pixeltrix]

@jrep sorry, that question is something entirely unrelated - did you link to the wrong question or post in the wrong GH issue?