init_attributes

# File activemodel/lib/active_model/dirty.rb, line 253
    def init_attributes(other) # :nodoc:
      attrs = super
      if other.persisted? && self.class.respond_to?(:_default_attributes)
        self.class._default_attributes.map do |attr|
          attr.with_value_from_user(attrs.fetch_value(attr.name))
        end
      else
        attrs
      end
    end