Maintain a consistent order in `ActiveRecord::Base#attributes`

Fixes #18871

1 files changed, 10 insertions, 0 deletions

diff --git a/activerecord/test/cases/attribute_set_test.rb b/activerecord/test/cases/attribute_set_test.rb
index 8025c7c4d2..112cd2fb14 100644
--- a/activerecord/test/cases/attribute_set_test.rb
+++ b/activerecord/test/cases/attribute_set_test.rb
@@ -65,6 +65,16 @@ module ActiveRecord
       assert_equal({ foo: 1, bar: 2.2 }, attributes.to_h)
     end
 
+    test "to_hash maintains order" do
+      builder = AttributeSet::Builder.new(foo: Type::Integer.new, bar: Type::Float.new)
+      attributes = builder.build_from_database(foo: '2.2', bar: '3.3')
+
+      attributes[:bar]
+      hash = attributes.to_h
+
+      assert_equal [[:foo, 2], [:bar, 3.3]], hash.to_a
+    end
+
     test "values_before_type_cast" do
       builder = AttributeSet::Builder.new(foo: Type::Integer.new, bar: Type::Integer.new)
       attributes = builder.build_from_database(foo: '1.1', bar: '2.2')