class Foo < ActiveRecord::Base
  named_scope :a,lambda { |a| :conditions => { :a => a } }
  named_scope :b,lambda { |b| :conditions => { :b => b } }
end

我想要

class Foo < ActiveRecord::Base
  named_scope :ab,lambda { |a,b| :conditions => { :a => a,:b => b } }
end

但我宁愿以干燥的方式做这件事.我可以通过使用获得相同的效果

Foo.a(something).b(something_else)

但它并不是特别可爱.