prepare

# File activerecord/lib/active_record/store.rb, line 250
        def self.prepare(object, store_attribute)
          attribute = object.send(store_attribute)
          unless attribute.is_a?(ActiveSupport::HashWithIndifferentAccess)
            attribute = IndifferentCoder.as_indifferent_hash(attribute)
            object.public_send :"#{store_attribute}=", attribute
          end
          attribute
        end