2 files changed, 17 insertions, 0 deletions
diff --git a/activerecord/test/cases/scoping/named_scoping_test.rb b/activerecord/test/cases/scoping/named_scoping_test.rb
index 418a2ae04e..27f9df295f 100644
--- a/activerecord/test/cases/scoping/named_scoping_test.rb
+++ b/activerecord/test/cases/scoping/named_scoping_test.rb
@@ -447,6 +447,16 @@ class NamedScopingTest < ActiveRecord::TestCase
     assert_equal [posts(:sti_comments)], Post.with_special_comments.with_post(4).to_a.uniq
   end
 
+  def test_chaining_doesnt_leak_conditions_to_another_scopes
+    expected = Topic.where(approved: false).where(id: Topic.children.select(:parent_id))
+    assert_equal expected.to_a, Topic.rejected.has_children.to_a
+  end
+
+  def test_nested_scoping
+    expected = Reply.approved
+    assert_equal expected.to_a, Topic.rejected.nested_scoping(expected)
+  end
+
   def test_scopes_batch_finders
     assert_equal 4, Topic.approved.count
 
diff --git a/activerecord/test/models/topic.rb b/activerecord/test/models/topic.rb
index a6a47687a2..fdb461ed7f 100644
--- a/activerecord/test/models/topic.rb
+++ b/activerecord/test/models/topic.rb
@@ -10,6 +10,9 @@ class Topic < ActiveRecord::Base
   scope :approved, -> { where(approved: true) }
   scope :rejected, -> { where(approved: false) }
 
+  scope :children, -> { where.not(parent_id: nil) }
+  scope :has_children, -> { where(id: Topic.children.select(:parent_id)) }
+
   scope :scope_with_lambda, lambda { all }
 
   scope :by_lifo, -> { where(author_name: "lifo") }
@@ -88,6 +91,10 @@ class Topic < ActiveRecord::Base
     write_attribute(:approved, val)
   end
 
+  def self.nested_scoping(scope)
+    scope.base
+  end
+
   private
 
     def default_written_on