How to alias a class method in rails model?

You can use:

class Foo  
   def instance_method       
   end  

   alias_method :alias_for_instance_method, :instance_method

   def self.class_method
   end  

   class <<self  
     alias_method :alias_for_class_method, :class_method
   end  
 end  

OR Try:

self.singleton_class.send(:alias_method, :new_name, :original_name)