Fixed hmp for edgerails 2.2

lib/has_many_polymorphs/reflection.rb

@@ -2,18 +2,17 @@ module ActiveRecord #:nodoc:
   module Reflection #:nodoc:
 
     module ClassMethods #:nodoc:
-
-      # Update the default reflection switch so that <tt>:has_many_polymorphs</tt> types get instantiated. It's not a composed method so we have to override the whole thing.
+
       def create_reflection(macro, name, options, active_record)
         case macro
           when :has_many, :belongs_to, :has_one, :has_and_belongs_to_many
-            reflection = AssociationReflection.new(macro, name, options, active_record)
+            klass = options[:through] ? ThroughReflection : AssociationReflection
+            reflection = klass.new(macro, name, options, active_record)
           when :composed_of
             reflection = AggregateReflection.new(macro, name, options, active_record)
-        # added by has_many_polymorphs #
+          # added by has_many_polymorphs #
           when :has_many_polymorphs
             reflection = PolymorphicReflection.new(macro, name, options, active_record)
-        # end added #
         end
         write_inheritable_hash :reflections, name => reflection
         reflection