ActiveRecord::Base.execute_callstack_for_multiparameter_attributes doesn't appear to handle serialized columns

Hi Mike,

We're currently discussing refactoring of the multiparameter assignment in ticket 4346. You may want to have a look at that thread too but although that issue is related to multiparameter and time class, it is not dealing specifically with serialized attributes.

Additionally, i think the solution you are suggesting is only for serialized attributes which although an edge use case, it not the usual way to do things.

Currently the klass of the attribute is determined by reflection over an association OR by column_for_attribute(name_of_column). The class is finally determined by sending the method "klass" on the returned object. You need to update your model, to ensure that column_for_attribute(your_serialized_column) returns a Time Column object, so that running "klass" on it returns "Time", then you're set to go.

The code below should get you started.

  class YourModel < ActiveRecord::Base
    columns_hash["your_serialized_time_column"] = ActiveRecord::ConnectionAdapters::Column.new("your_serialized_time_column", nil, "time")
  end

Do let us know if this helps you.