1 files changed, 18 insertions, 0 deletions
diff --git a/activerecord/test/cases/validations/uniqueness_validation_test.rb b/activerecord/test/cases/validations/uniqueness_validation_test.rb
index 8abb6c9844..4c14d93c66 100644
--- a/activerecord/test/cases/validations/uniqueness_validation_test.rb
+++ b/activerecord/test/cases/validations/uniqueness_validation_test.rb
@@ -53,6 +53,14 @@ class CoolTopic < Topic
   validates_uniqueness_of :id
 end
 
+class TopicWithAfterCreate < Topic
+  after_create :set_author
+
+  def set_author
+    update_attributes!(:author_name => "#{title} #{id}")
+  end
+end
+
 class UniquenessValidationTest < ActiveRecord::TestCase
   INT_MAX_VALUE = 2147483647
 
@@ -469,6 +477,16 @@ class UniquenessValidationTest < ActiveRecord::TestCase
     assert t.save, "Should still save t as unique"
   end
 
+  def test_validate_uniqueness_with_after_create_performing_save
+    TopicWithAfterCreate.validates_uniqueness_of(:title)
+    topic = TopicWithAfterCreate.create!(:title => "Title1")
+    assert topic.author_name.start_with?("Title1")
+
+    topic2 = TopicWithAfterCreate.new(:title => "Title1")
+    refute topic2.valid?
+    assert_equal(["has already been taken"], topic2.errors[:title])
+  end
+
   def test_validate_uniqueness_uuid
     skip unless current_adapter?(:PostgreSQLAdapter)
     item = UuidItem.create!(uuid: SecureRandom.uuid, title: 'item1')