Rails - Sep 2006 - has_many relationship extensions and scoping rules

Hi all !

Is this supposed to work ?

class Email < ActiveRecord::Base
  has_many :to, :class_name => 'Recipient', :conditions =>
"recipients.source = 'to'" do
    def create!(*args)
      with_scope(:create => {:source => 'to'}) do
        super
      end
    end

    def build(*args)
      with_scope(:create => {:source => 'to'}) do
        super
      end
    end
  end
end

From my tests, if I call Email.to.create!, the recipient model
correctly has it's source attribute set to 'to'.  On the other hand,
if I call #build, the recipient's source is nil.

There must be something I'm doing wrong...

Thanks !
-- 
François Beausoleil
http://blog.teksol.info/
http://piston.rubyforge.org/

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On 9/8/06, Francois Beausoleil
<francois.beausoleil-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Hi all !
>
> Is this supposed to work ?
>
> class Email < ActiveRecord::Base
>   has_many :to, :class_name => ''Recipient'',
:conditions =>
> "recipients.source = ''to''" do
>     def create!(*args)
>       with_scope(:create => {:source => ''to''}) do
>         super
>       end
>     end
>
>     def build(*args)
>       with_scope(:create => {:source => ''to''}) do
>         super
>       end
>     end
>   end
> end
>
> From my tests, if I call Email.to.create!, the recipient model
> correctly has it''s source attribute set to ''to''.
On the other hand,
> if I call #build, the recipient''s source is nil.
>
> There must be something I''m doing wrong...
Using with_scope around build simply has no effect.  with_scope is
used for scoping the SQL query, which does not make sense in the
context of build (which just builds up an instance).  I think what you
want to do can be achieved by calling super, grabbing the returned
object, and forcibly setting the "source" attribute to your desired
value ("to") before returning.

-- 
Bosko Milekic <bosko.milekic-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
http://www.crowdedweb.com/

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