define_default_attribute

# File activerecord/lib/active_record/attributes.rb, line 249
        def define_default_attribute(name, value, type, from_user))
          if value == NO_DEFAULT_PROVIDED
            default_attribute = _default_attributes[name].with_type(type)
          elsif from_user
            default_attribute = ActiveModel::Attribute::UserProvidedDefault.new(
              name,
              value,
              type,
              _default_attributes.fetch(name.to_s) { nil },
            )
          else
            default_attribute = ActiveModel::Attribute.from_database(name, value, type)
          end
          _default_attributes[name] = default_attribute
        end