#79 ✓resolved
john (at psynix)

"undefined method `abstract_class?' for Object:Class" with collectiveidea-awesome_nested_set and searchlogic

Reported by john (at psynix) | April 1st, 2009 @ 07:41 AM

I've run into a slight incompatibility with awesome_nested_set (1.1.1), searchlogic (1.6.4) and scoped acts_as_nested_set.

With everything in place:


class SomeModel < ActiveRecord::Base
  acts_as_nested_set :scope => :account
end

Calling any nested set method fails with:


NoMethodError: undefined method `abstract_class?' for Object:Class
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:2212:in `class_of_active_record_descendant'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:1467:in `base_class'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:1143:in `reset_table_name'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:1139:in `table_name'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:1276:in `columns'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:1289:in `column_names'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/searchlogic-1.6.4/lib/searchlogic/conditions/base.rb:106:in `needed?'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/searchlogic-1.6.4/lib/searchlogic/search/base.rb:37:in `needed?'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/searchlogic-1.6.4/lib/searchlogic/active_record/base.rb:159:in `filter_options_with_searchlogic'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/searchlogic-1.6.4/lib/searchlogic/active_record/base.rb:46:in `with_scope'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/named_scope.rb:94:in `named_scope'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/named_scope.rb:177:in `call'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/named_scope.rb:177:in `method_missing'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/collectiveidea-awesome_nested_set-1.1.1/lib/awesome_nested_set.rb:312:in `self_and_descendants'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/collectiveidea-awesome_nested_set-1.1.1/lib/awesome_nested_set.rb:319:in `descendants'

If I remove either the :scope on the nested set or the searchlogic config.gem (installing as a plugin makes no diff btw) then it won't generate any errors.

TIA,

John

Comments and changes to this ticket

  • john (at psynix)

    john (at psynix) April 1st, 2009 @ 07:53 AM

    Sorry, forgot to mention that I'm using Rails v2.3.2.

  • Ben Johnson

    Ben Johnson April 16th, 2009 @ 03:30 AM

    • State changed from “new” to “open”

    Yeah that's strange, search logic build on the defaults of active record, so those plugins change default I would imagine something might not go right. I'll try t out in my console and see what i come up with.

  • mtyaka

    mtyaka May 23rd, 2009 @ 05:38 PM

    • Tag set to anonymous scope, awesome_nested_set, patch, scopes

    I also came across this problem when using the awesome_nested_set plugin. I didn't use the :scope option and most of the things worked fine except some nested set methods like siblings, left_sibling, etc.

    I tracked the problem down to anonymous scopes (awesome_nested_set uses them a lot internally). Chained anonymous scopes are the reason for the above error. This fails:

    MyModel.scoped({:conditions => {:id => 1}).scoped(:order => :id)
    

    scoped which looks like a method is in fact just a named_scope, defined in ActiveRecord::Base as:

    named_scope :scoped, lambda { |scope| scope }
    

    The problem is that named scope "scoped" is defined in the context of ActiveRecord::Base and not in the context of its subclass (e.g. MyModel). Searchlogic hooks into AR methods and expects self to be MyModel, not ActiveRecord::Base.

    I found out I could avoid this problem if I redefined the "scoped" named scope in my models:

    class MyModel < ActiveRecord::Base
      named_scope :scoped, lambda { |scope| scope }
      ...
    end
    

    I am attaching a patch that extends AR's inherited method and automatically redefines scoped named scope on subclasses of ActiveRecord::Base.

  • Ben Johnson

    Ben Johnson July 30th, 2009 @ 01:38 PM

    • State changed from “open” to “resolved”

    This should be fixed in 2.0. Thanks!

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