ActiveRecord::UnknownPrimaryKey: Unknown primary key for table line_items in model LineItem.
        from c:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activerecord-4.0.0.rc1/lib/active_record/reflection.rb:391:in `primary_key'
        from c:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activerecord-4.0.0.rc1/lib/active_record/reflection.rb:226:in `association_primar
y_key'
        from c:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activerecord-4.0.0.rc1/lib/active_record/associations/has_many_association.rb:131
:in `foreign_key_present?'
        from c:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activerecord-4.0.0.rc1/lib/active_record/associations/association.rb:170:in `find
_target?'
        from c:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activerecord-4.0.0.rc1/lib/active_record/associations/collection_association.rb:3
57:in `load_target'
        from c:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activerecord-4.0.0.rc1/lib/active_record/associations/collection_proxy.rb:45:in `
load_target'
        from c:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activerecord-4.0.0.rc1/lib/active_record/associations/collection_proxy.rb:920:in
`to_ary'
        from c:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activerecord-4.0.0.rc1/lib/active_record/relation.rb:549:in `inspect'
        from c:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-4.0.0.rc1/lib/rails/commands/console.rb:90:in `start'
        from c:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-4.0.0.rc1/lib/rails/commands/console.rb:9:in `start'
        from c:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-4.0.0.rc1/lib/rails/commands.rb:66:in `<top (required)>'
        from bin/rails:4:in `require'
        from bin/rails:4:in `<main>'