Add :from to has_many, belongs_to, etc

Currently, we have the need for the following in our app:

class Game < ActiveRecord::Base
  has_many :summarized_game_players, :from => 'v_game_player_statuses',
           :class_name => 'GamePlayer', :readonly => true
end

This is to create an association that loads a GamePlayer object, but gets the data from v_game_player_statuses.

The workaround we have is this:

class Game < ActiveRecord::Base
  has_many :summarized_game_players, :finder_sql => 'SELECT * FROM v_game_player_statuses where game_id = #{id}',
         :class_name => 'GamePlayer', :readonly => true
end

Which works, but having :from support to be consistent with find() would be really nice.

I will gladly attempt a patch and required tests, but I'm just trying to sift through active_record/associations and I'm a bit lost where to add it. Suggestions or thoughts?

Thanks, Nate