3 files changed, 6 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb
index 0a3c7c6a60..634d4a181a 100755
--- a/activerecord/lib/active_record/associations.rb
+++ b/activerecord/lib/active_record/associations.rb
@@ -1398,7 +1398,7 @@ module ActiveRecord
                 primary_key = reflection.source_reflection.primary_key_name
                 send(through.name).select("DISTINCT #{through.quoted_table_name}.#{primary_key}").map!(&:"#{primary_key}")
               else
-                send(reflection.name).select("#{reflection.quoted_table_name}.#{reflection.klass.primary_key}").map!(&:id)
+                send(reflection.name).select("#{reflection.quoted_table_name}.#{reflection.klass.primary_key}").except(:includes).map!(&:id)
               end
             end
           end
diff --git a/activerecord/test/cases/associations/has_many_associations_test.rb b/activerecord/test/cases/associations/has_many_associations_test.rb
index b55b08bf9d..6e47967696 100644
--- a/activerecord/test/cases/associations/has_many_associations_test.rb
+++ b/activerecord/test/cases/associations/has_many_associations_test.rb
@@ -900,6 +900,10 @@ class HasManyAssociationsTest < ActiveRecord::TestCase
     assert !company.clients.loaded?
   end
 
+  def test_get_ids_ignores_include_option
+    assert_equal [readers(:michael_welcome).id], posts(:welcome).readers_with_person_ids
+  end
+
   def test_get_ids_for_unloaded_finder_sql_associations_loads_them
     company = companies(:first_firm)
     assert !company.clients_using_sql.loaded?
diff --git a/activerecord/test/models/post.rb b/activerecord/test/models/post.rb
index d092c4bf09..dd06822cfd 100644
--- a/activerecord/test/models/post.rb
+++ b/activerecord/test/models/post.rb
@@ -69,6 +69,7 @@ class Post < ActiveRecord::Base
   has_many :authors, :through => :categorizations
 
   has_many :readers
+  has_many :readers_with_person, :include => :person, :class_name => "Reader"
   has_many :people, :through => :readers
   has_many :people_with_callbacks, :source=>:person, :through => :readers,
               :before_add    => lambda {|owner, reader| log(:added,   :before, reader.first_name) },