Upgrading from rails 3.0 to 3.2

Hi,
I am new to ruby on rails development. Please excuse me if my question
is too obvious. I am trying to upgrade from rails 3.0 to 3.2. I am stuck
at a point. I am running into this following error.

INTERNAL ERROR!!! undefined method `abstract_class?' for
#<Class:0x007f8692ac2450>
  /Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/attr_encrypted-1.2.1/lib/attr_encrypted.rb:241:in
`method_missing'
  /Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activerecord-3.2.13/lib/active_record/dynamic_matchers.rb:55:in
`method_missing'
  /Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/attr_encrypted-1.2.1/lib/attr_encrypted/adapters/active_record.rb:50:in
`method_missing_with_attr_encrypted'
  /Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activerecord-3.2.13/lib/active_record/base.rb:421:in
`inspect'

What I found is that, the method 'abstract_class?' has been moved from
base.rb to inheritance.rb in rails 3.2.
I was actually trying to use execute the following statement when this
error happened.
ActiveRecord::Base.connection.column_exists? klass.table_name, :user_id

Any ideas on work arounds

Thanks in advance.
Chaitanya

That version of attr_encrypted is fairly old, but I don’t think it’s the culprit. Can you post the full stack trace?

–Matt Jones

Thanks Matt. Here's is the longer stack trace. I got past this error
when I copied
the abstract_class? and other methods from inheritance.rb to base.rb.
How can we make ActiveRecord bse.rb include inheritance.rb so we dont
have to so that?

/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/attr_encrypted-1.2.1/lib/attr_encrypted.rb:241:in
`method_missing': undefined method `abstract_class?' for
#<Class:0x007f9c0b678410> (NoMethodError)
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activerecord-3.2.13/lib/active_record/dynamic_matchers.rb:55:in
`method_missing'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/attr_encrypted-1.2.1/lib/attr_encrypted/adapters/active_record.rb:50:in
`method_missing_with_attr_encrypted'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activerecord-3.2.13/lib/active_record/model_schema.rb:142:in
`reset_table_name'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activerecord-3.2.13/lib/active_record/model_schema.rb:104:in
`table_name'
  from
/Users/CRalladoddi/ABC/deviceservice/app/models/concerns/acts_as_asset.rb:7:in
`included'
  from
/Users/CRalladoddi/ABC/deviceservice/app/models/notification.rb:26:in
`include'
  from
/Users/CRalladoddi/ABC/deviceservice/app/models/notification.rb:26:in
`<class:Notification>'
  from
/Users/CRalladoddi/ABC/deviceservice/app/models/notification.rb:20:in
`<top (required)>'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in
`require'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in
`block in require'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:236:in
`load_dependency'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in
`require'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:359:in
`require_or_load'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:502:in
`load_missing_constant'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:192:in
`block in const_missing'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:190:in
`each'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:190:in
`const_missing'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:514:in
`load_missing_constant'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:192:in
`block in const_missing'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:190:in
`each'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:190:in
`const_missing'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/inflector/methods.rb:230:in
`block in constantize'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/inflector/methods.rb:229:in
`each'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/inflector/methods.rb:229:in
`constantize'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/inflector/methods.rb:260:in
`safe_constantize'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/core_ext/string/inflections.rb:66:in
`safe_constantize'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/actionpack-3.2.13/lib/action_controller/metal/params_wrapper.rb:152:in
`_default_wrap_model'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/actionpack-3.2.13/lib/action_controller/metal/params_wrapper.rb:169:in
`_set_wrapper_defaults'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/actionpack-3.2.13/lib/action_controller/metal/params_wrapper.rb:133:in
`inherited'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/actionpack-3.2.13/lib/abstract_controller/railties/routes_helpers.rb:7:in
`block (2 levels) in with'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/actionpack-3.2.13/lib/action_controller/railties/paths.rb:7:in
`block (2 levels) in with'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/bundler/gems/aylauth-1e9668412cc5/app/controllers/aylauth/notifications_controller.rb:2:in
`<module:Aylauth>'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/bundler/gems/aylauth-1e9668412cc5/app/controllers/aylauth/notifications_controller.rb:1:in
`<top (required)>'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in
`require'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in
`block in require'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:236:in
`load_dependency'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in
`require'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:359:in
`require_or_load'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:313:in
`depend_on'
  from
/Users/CRalladoddi/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:225:in
`require_dependency'