Fix `Type::Date#serialize` to return a date object correctly

Currently `Type::Date#serialize` does not cast a value to a date object.
It should be cast to a date object for finding by date column correctly
working.

Fixes #25354.

1 files changed, 4 insertions, 0 deletions

diff --git a/activemodel/lib/active_model/type/date.rb b/activemodel/lib/active_model/type/date.rb
index f74243a22c..edd07ac38c 100644
--- a/activemodel/lib/active_model/type/date.rb
+++ b/activemodel/lib/active_model/type/date.rb
@@ -7,6 +7,10 @@ module ActiveModel
         :date
       end
 
+      def serialize(value)
+        cast(value)
+      end
+
       def type_cast_for_schema(value)
         "'#{value.to_s(:db)}'"
       end