5 files changed, 23 insertions, 1 deletions
diff --git a/activerecord/test/cases/scoping/named_scoping_test.rb b/activerecord/test/cases/scoping/named_scoping_test.rb
index f0ad9ebb8a..f66b76a7ad 100644
--- a/activerecord/test/cases/scoping/named_scoping_test.rb
+++ b/activerecord/test/cases/scoping/named_scoping_test.rb
@@ -2,12 +2,13 @@ require "cases/helper"
 require 'models/post'
 require 'models/topic'
 require 'models/comment'
+require 'models/rating'
 require 'models/reply'
 require 'models/author'
 require 'models/developer'
 
 class NamedScopingTest < ActiveRecord::TestCase
-  fixtures :posts, :authors, :topics, :comments, :author_addresses
+  fixtures :posts, :authors, :topics, :comments, :author_addresses, :ratings
 
   def test_implements_enumerable
     assert !Topic.all.empty?
@@ -115,6 +116,10 @@ class NamedScopingTest < ActiveRecord::TestCase
     assert_equal 1,SpecialPost.containing_the_letter_a.count
   end
 
+  def test_scope_subquery_with_STI
+    assert_nothing_raised { VerySpecialComment.special_parent(SpecialRating.first).count }
+  end
+
   def test_has_many_through_associations_have_access_to_scopes
     assert_not_equal Comment.containing_the_letter_e, authors(:david).comments
     assert !Comment.containing_the_letter_e.empty?
diff --git a/activerecord/test/fixtures/ratings.yml b/activerecord/test/fixtures/ratings.yml
index 34e208efa3..2b45c5080e 100644
--- a/activerecord/test/fixtures/ratings.yml
+++ b/activerecord/test/fixtures/ratings.yml
@@ -2,13 +2,23 @@ normal_comment_rating:
   id: 1
   comment_id: 8
   value: 1
+  type: Rating
 
 special_comment_rating:
   id: 2
   comment_id: 6
   value: 1
+  type: Rating
 
 sub_special_comment_rating:
   id: 3
   comment_id: 12
   value: 1
+  type: Rating
+
+special_rating:
+  id: 4
+  comment_id: 10
+  value: 1
+  type: SpecialRating
+  special_comment_id: 3
diff --git a/activerecord/test/models/comment.rb b/activerecord/test/models/comment.rb
index ede5fbd0c6..6a9dfacf56 100644
--- a/activerecord/test/models/comment.rb
+++ b/activerecord/test/models/comment.rb
@@ -35,4 +35,5 @@ class SubSpecialComment < SpecialComment
 end
 
 class VerySpecialComment < Comment
+  scope :special_parent, -> (special_rating) { where parent_id: special_rating.special_comment.id }
 end
diff --git a/activerecord/test/models/rating.rb b/activerecord/test/models/rating.rb
index 25a52c4ad7..5409230c2e 100644
--- a/activerecord/test/models/rating.rb
+++ b/activerecord/test/models/rating.rb
@@ -2,3 +2,7 @@ class Rating < ActiveRecord::Base
   belongs_to :comment
   has_many :taggings, :as => :taggable
 end
+
+class SpecialRating < Rating
+  belongs_to :special_comment
+end
diff --git a/activerecord/test/schema/schema.rb b/activerecord/test/schema/schema.rb
index b44e72a67c..cbcdf93673 100644
--- a/activerecord/test/schema/schema.rb
+++ b/activerecord/test/schema/schema.rb
@@ -579,7 +579,9 @@ ActiveRecord::Schema.define do
 
   create_table :ratings, force: true do |t|
     t.integer :comment_id
+    t.integer :special_comment_id
     t.integer :value
+    t.string :type
   end
 
   create_table :readers, force: true do |t|