2 files changed, 14 insertions, 2 deletions
diff --git a/activerecord/lib/active_record/associations/preloader/association.rb b/activerecord/lib/active_record/associations/preloader/association.rb
index 253998fb23..b4c3908b10 100644
--- a/activerecord/lib/active_record/associations/preloader/association.rb
+++ b/activerecord/lib/active_record/associations/preloader/association.rb
@@ -77,7 +77,7 @@ module ActiveRecord
             # Some databases impose a limit on the number of ids in a list (in Oracle it's 1000)
             # Make several smaller queries if necessary or make one query if the adapter supports it
             sliced  = owner_keys.each_slice(model.connection.in_clause_length || owner_keys.size)
-            records = sliced.map { |slice| records_for(slice) }.flatten
+            records = sliced.map { |slice| records_for(slice).to_a }.flatten
           end
 
           # Each record may have multiple owners, and vice-versa
@@ -93,7 +93,8 @@ module ActiveRecord
         end
 
         def build_scope
-          scope = klass.scoped
+          scope = klass.unscoped
+          scope.default_scoped = true
 
           scope = scope.where(interpolate(options[:conditions]))
           scope = scope.where(interpolate(preload_options[:conditions]))
diff --git a/activerecord/test/cases/associations/eager_test.rb b/activerecord/test/cases/associations/eager_test.rb
index b27a93f857..efdb7cbb36 100644
--- a/activerecord/test/cases/associations/eager_test.rb
+++ b/activerecord/test/cases/associations/eager_test.rb
@@ -1169,4 +1169,15 @@ class EagerAssociationTest < ActiveRecord::TestCase
     assert_no_queries { assert_equal 1, posts[0].categories[1].categorizations.length }
     assert_no_queries { assert_equal 2, posts[1].categories[0].categorizations.length }
   end
+
+  test "scoping with a circular preload" do
+    assert_equal Comment.find(1), Comment.preload(:post => :comments).scoping { Comment.find(1) }
+  end
+
+  test "preload ignores the scoping" do
+    assert_equal(
+      Comment.find(1).post,
+      Post.where('1 = 0').scoping { Comment.preload(:post).find(1).post }
+    )
+  end
 end