Rails - Jun 2005 - has_and_belongs_to_many issues with before_destroy callback

Has anyone noticed that the row in the join table in a
has_and_belongs_to_many relationship is deleted *before* the
before_destroy callback gets triggered?


class Album < ActiveRecord::Base
  has_and_belongs_to_many :rankings
  before_destroy :delete_rankings
  
  private
  def delete_rankings
    info.logger "IN DELETE RANKINGS"
  end
end

class Ranking < ActiveRecord::Base
  has_and_belongs_to_many :albums
end


If I have an album with rankings, and I call album.destroy with full
logging turn on, I see this :

[4;35mSQL (0.000000)[m   [0;37mDELETE FROM albums_rankings WHERE album_id = 10[m
IN DELETE RANKINGS

This does not seem right. There is some logic I want to implement when
rankings get destroyed, and I am forced to use triggers to do it.

On 6/11/05, Shane Sherman <wtf242-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Has anyone noticed that the row in the join table in a
> has_and_belongs_to_many relationship is deleted *before* the
> before_destroy callback gets triggered?
> 
> 
> class Album < ActiveRecord::Base
>   has_and_belongs_to_many :rankings
>   before_destroy :delete_rankings
> 
>   private
>   def delete_rankings
>     info.logger "IN DELETE RANKINGS"
>   end
> end
> 
> class Ranking < ActiveRecord::Base
>   has_and_belongs_to_many :albums
> end
> 
> 
> If I have an album with rankings, and I call album.destroy with full
> logging turn on, I see this :
> 
> [4;35mSQL (0.000000)[m   [0;37mDELETE FROM albums_rankings WHERE album_id =
10[m
> IN DELETE RANKINGS
> 
> This does not seem right. There is some logic I want to implement when
> rankings get destroyed, and I am forced to use triggers to do it.
You''ve found http://dev.rubyonrails.com/ticket/1183,  It''s
marked for
1.0 at present
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> 

-- 
Cheers

Koz