I have two related models such as this:
class PartCategory < ActiveRecord::Base has_many :part_types scope :engine, where(:name => 'Engine') end
class PartType < ActiveRecord::Base belongs_to :part_category end
I would like to add a scope to the PartType model such as:
scope :engine_parts, lambda { joins(:part_category).engine }
But when I try that, I get the following error:
NoMethodError: undefined method `default_scoped?' for ActiveRecord::Base:Class from /Users/bappelt/RubymineProjects/MyStreetMachine/idunno42!/ruby/ 1.9.1/gems/activerecord-3.1.0/lib/active_record/base.rb:1082:in `method_missing' from /Users/bappelt/RubymineProjects/MyStreetMachine/idunno42!/ruby/ 1.9.1/gems/activerecord-3.1.0/lib/active_record/relation/ spawn_methods.rb:11:in `merge' from /Users/bappelt/RubymineProjects/MyStreetMachine/idunno42!/ruby/ 1.9.1/gems/activerecord-3.1.0/lib/active_record/named_scope.rb:182:in `block in scope' from (irb):1 from /Users/bappelt/RubymineProjects/MyStreetMachine/idunno42!/ruby/ 1.9.1/gems/railties-3.1.0/lib/rails/commands/console.rb:45:in `start' from /Users/bappelt/RubymineProjects/MyStreetMachine/idunno42!/ruby/ 1.9.1/gems/railties-3.1.0/lib/rails/commands/console.rb:8:in `start' from /Users/bappelt/RubymineProjects/MyStreetMachine/idunno42!/ruby/ 1.9.1/gems/railties-3.1.0/lib/rails/commands.rb:40:in `<top (required)>' from script/rails:6:in `require' from script/rails:6:in `<main>'
I don't have a lot of experience with the scope thing, so I am probably missing something fundamental here. Can someone please tell me what it is.
