Rails - Sep 2008 - Serializing an AR object into an attribute in another

Hi,

I don''t know if this is a bug or it is the expected behavior but I am
trying to serialize an AR object into another.
I know this is not very usual but I don''t want to use a belongs_to
association because the object is transient.
I need an snapshot of how the 2nd object was at the moment of the
creation of the 1st.

class One < ActiveRecord::Base
end

class Two < ActiveRecord::Base
  serialize one
end

obj1 = One.find(:first)
obj2 = Two.create(...)
obj2.one = obj1
obj2.save

My problem is that it seems that AectiveRecord only saves the id of the
serialized object when create or update the second object and not all
the yaml format of the serialized.
There is not any association between the two objects.

Anyone knows if I am on the right track? Or I need to change the
direction?

Thanks
Juanma Cervera
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You might want to try doing your own "serializing".

class Two < ActiveRecord::Base
  def one=(new_one)
    self.write_attribute(:one, new_one.to_yaml)
  end
  def one
    @one ||= YAML.load(self.read_attribute(:one))
  end
end

I haven''t tested this, but it might be a place to start.


Juanma Cervera wrote:
> Hi,
>
> I don''t know if this is a bug or it is the expected behavior but I
am
> trying to serialize an AR object into another.
> I know this is not very usual but I don''t want to use a belongs_to
> association because the object is transient.
> I need an snapshot of how the 2nd object was at the moment of the
> creation of the 1st.
>
> class One < ActiveRecord::Base
> end
>
> class Two < ActiveRecord::Base
>   serialize one
> end
>
> obj1 = One.find(:first)
> obj2 = Two.create(...)
> obj2.one = obj1
> obj2.save
>
> My problem is that it seems that AectiveRecord only saves the id of the
> serialized object when create or update the second object and not all
> the yaml format of the serialized.
> There is not any association between the two objects.
>
> Anyone knows if I am on the right track? Or I need to change the
> direction?
>
> Thanks
> Juanma Cervera
> --
> Posted via http://www.ruby-forum.com/.
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It has been easy with your help.
Many thanks.

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