changed_in_place?

# File activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb, line 945
        def changed_in_place?(raw_old_value, new_value)
          # Normalization is required because MySQL JSON data format includes
          # the space between the elements.
          super(serialize(deserialize(raw_old_value)), new_value)
        end