callbacks for to-one associations?

rubyonrails-talk
1

To-many associations have those nice before/after_add/remove callbacks. What's the best way to hook in custom code for to-one associations? I want to update a date field every time a certain belongs_to association gets changed.

Thanks, Christian

2

I wrote:

To-many associations have those nice before/after_add/remove callbacks. What's the best way to hook in custom code for to-one associations? I want to update a date field every time a certain belongs_to association gets changed.

The following seems to do the trick. Is there a more elegant solution, though?

class Foo < ActiveRecord::Base    belongs_to :bar

   alias_method :_bar=, :bar=

   def bar=(new_bar)      update_date      self._bar = new_bar    end

Thanks, Christian