1 files changed, 4 insertions, 4 deletions
diff --git a/activerecord/lib/active_record/associations/association.rb b/activerecord/lib/active_record/associations/association.rb
index 7667c6ed8b..ca8c7794e0 100644
--- a/activerecord/lib/active_record/associations/association.rb
+++ b/activerecord/lib/active_record/associations/association.rb
@@ -156,9 +156,9 @@ module ActiveRecord
         reset
       end
 
-      # We can't dump @reflection since it contains the scope proc
+      # We can't dump @reflection and @through_reflection since it contains the scope proc
       def marshal_dump
-        ivars = (instance_variables - [:@reflection]).map { |name| [name, instance_variable_get(name)] }
+        ivars = (instance_variables - [:@reflection, :@through_reflection]).map { |name| [name, instance_variable_get(name)] }
         [@reflection.name, ivars]
       end
 
@@ -201,8 +201,8 @@ module ActiveRecord
           if (reflection.has_one? || reflection.collection?) && !options[:through]
             attributes[reflection.foreign_key] = owner[reflection.active_record_primary_key]
 
-            if reflection.options[:as]
-              attributes[reflection.type] = owner.class.base_class.name
+            if reflection.type
+              attributes[reflection.type] = owner.class.polymorphic_name
             end
           end