TypeError: bind argument must be an instance of #<Module:0x483af9f5>

[jcoyne]

Using: jruby 1.7.18 (1.9.3p551) 2015-01-06 625381c on Java HotSpot(TM) 64-Bit Server VM 1.7.0_72-b14 +jit [linux-amd64]

TypeError: bind argument must be an instance of #<Module:0x483af9f5>
             define_method at org/jruby/RubyModule.java:1554
   define_method_attribute at /home/travis/build/projecthydra/active_fedora/lib/active_fedora/attribute_methods/read.rb:54
               module_eval at org/jruby/RubyModule.java:2337
   define_method_attribute at /home/travis/build/projecthydra/active_fedora/lib/active_fedora/attribute_methods/read.rb:53
   define_attribute_method at /home/travis/build/projecthydra/active_fedora/gemfiles/vendor/bundle/jruby/1.9/gems/activemodel-4.2.0/lib/active_model/attribute_methods.rb:292
                      each at org/jruby/RubyArray.java:1613
   define_attribute_method at /home/travis/build/projecthydra/active_fedora/gemfiles/vendor/bundle/jruby/1.9/gems/activemodel-4.2.0/lib/active_model/attribute_methods.rb:285
  define_attribute_methods at /home/travis/build/projecthydra/active_fedora/gemfiles/vendor/bundle/jruby/1.9/gems/activemodel-4.2.0/lib/active_model/attribute_methods.rb:252
                      each at org/jruby/RubyArray.java:1613
  define_attribute_methods at /home/travis/build/projecthydra/active_fedora/gemfiles/vendor/bundle/jruby/1.9/gems/activemodel-4.2.0/lib/active_model/attribute_methods.rb:252
           generate_method at /home/travis/build/projecthydra/active_fedora/lib/active_fedora/attribute_methods.rb:117
               synchronize at org/jruby/ext/thread/Mutex.java:149
            mu_synchronize at /home/travis/.rvm/rubies/jruby-1.7.18-d19/lib/ruby/1.9/mutex_m.rb:62
           generate_method at /home/travis/build/projecthydra/active_fedora/lib/active_fedora/attribute_methods.rb:116
                      File at /home/travis/build/projecthydra/active_fedora/lib/active_fedora/file.rb:9
              ActiveFedora at /home/travis/build/projecthydra/active_fedora/lib/active_fedora/file.rb:4
                    (root) at /home/travis/build/projecthydra/active_fedora/lib/active_fedora/file.rb:1
                    (root) at /home/travis/build/projecthydra/active_fedora/lib/active_fedora/om_datastream.rb:1
              ActiveFedora at 
/home/travis/build/projecthydra/active_fedora/lib/active_fedora/om_datastream.rb:4
                    (root) at /home/travis/build/projecthydra/active_fedora/lib/active_fedora/om_datastream.rb:3
                    (root) at /home/travis/build/projecthydra/active_fedora/spec/samples/hydra-mods_article_datastream.rb:1
                   require at org/jruby/RubyKernel.java:1071
          require_relative at file:/home/travis/.rvm/rubies/jruby-1.7.18-d19/lib/jruby.jar!/jruby/kernel19/kernel.rb:24
                     Hydra at /home/travis/build/projecthydra/active_fedora/spec/samples/hydra-mods_article_datastream.rb:21
                   require at org/jruby/RubyKernel.java:1071
                    (root) at /home/travis/build/projecthydra/active_fedora/spec/samples/hydra-mods_article_datastream.rb:2
                   require at org/jruby/RubyKernel.java:1071
                    (root) at /home/travis/build/projecthydra/active_fedora/spec/samples/models/mods_article.rb:1
                   require at org/jruby/RubyKernel.java:1071
                    (root) at /home/travis/build/projecthydra/active_fedora/spec/samples/models/mods_article.rb:2
                      load at org/jruby/RubyKernel.java:1087
                    (root) at /home/travis/build/projecthydra/active_fedora/spec/samples/samples.rb:1
                      each at org/jruby/RubyArray.java:1613
                    (root) at /home/travis/build/projecthydra/active_fedora/spec/samples/samples.rb:2
                    (root) at /home/travis/build/projecthydra/active_fedora/spec/spec_helper.rb:1
                    (root) at /home/travis/build/projecthydra/active_fedora/spec/spec_helper.rb:30
                    (root) at /home/travis/build/projecthydra/active_fedora/spec/integration/associations_spec.rb:1
                    (root) at /home/travis/build/projecthydra/active_fedora/spec/integration/associations_spec.rb:1

[jcoyne]

It seems to be triggered by this code in my application: https://github.com/projecthydra/active_fedora/blob/master/lib/active_fedora/attribute_methods.rb#L117

[jcoyne]

Or rather here: https://github.com/projecthydra/active_fedora/blob/master/lib/active_fedora/attribute_methods/read.rb#L54

[kares]

the owner of the method you're trying to bind is likely not in the target's hierarchy ... you should verify that the same piece of code works on MRI before assuming this to be a JRuby bug, in which case a simple piece of script code reproducing the behaviour might be handy.

[grosscol]

I've just run into this issue as well. Looking around a bit I found a brief gist by @jamesotron https://gist.github.com/jamesotron/10336130 that is a minimal example for producing the error.

I'm going to check that this example is a model for what the active fedora code is doing as well. The rails project in which I encountered this runs on mri 2.2 and does not encounter this error.

[kares]

1.7 is not "that" 2.x compatible ... "transplantable" methods are a feature in 2.x which JRuby does not (yet) support and if it will it might land on 9K only - since 1.7 is primarily MRI 1.9.3 compatible ...

this should be reported with the gems that they do not support 1.9.3 (e.g. active_fedora declares Ruby >= 1.9.3) ... Rails does a similar work-around for generated methods on "older" Rubies.