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-rw-r--r--activerecord/test/cases/validations/uniqueness_validation_test.rb11
1 files changed, 11 insertions, 0 deletions
diff --git a/activerecord/test/cases/validations/uniqueness_validation_test.rb b/activerecord/test/cases/validations/uniqueness_validation_test.rb
index 7502a55391..e601c53dbf 100644
--- a/activerecord/test/cases/validations/uniqueness_validation_test.rb
+++ b/activerecord/test/cases/validations/uniqueness_validation_test.rb
@@ -469,4 +469,15 @@ class UniquenessValidationTest < ActiveRecord::TestCase
assert_match(/\AUnknown primary key for table dashboards in model/, e.message)
assert_match(/Can not validate uniqueness for persisted record without primary key.\z/, e.message)
end
+
+ def test_validate_uniqueness_ignores_itself_when_primary_key_changed
+ Topic.validates_uniqueness_of(:title)
+
+ t = Topic.new("title" => "This is a unique title")
+ assert t.save, "Should save t as unique"
+
+ t.id += 1
+ assert t.valid?, "Should be valid"
+ assert t.save, "Should still save t as unique"
+ end
end