Rails - Nov 2008 - STI updating the :type attribute of an STI instance

Hi !

i''ve different users subclasses organised thanks to STI under a user
mother class, problem is that i can''t find a way to exchange a user
form
a certain type to an other , any light ???

class User < ActiveRecord::Base

end

class Guest < User
  has_and_belongs_to_many :hosts,
    :join_table => ''invitations''
end

class Host < User
  has_and_belongs_to_many :guests,
    :join_table => ''invitations''
end


#i''d like to change a Guest user to make him become Host
:
>> g = Guest.first
=> #<Guest id: 418519017, type: "Guest", ...#>
g.update_attributes!(:type=>''Host'')
=> true
>> g
=> #<Guest id: 418519017, type: "Guest", ...#>


#It seems that this "type" attribute is protected is there a way to
by-pass this ?

you can find the pastie of the above code here :
http://pastie.org/317885
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On Nov 18, 4:35 pm, nico Itkin
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
> => #<Guest id: 418519017, type: "Guest", ...#>
> g.update_attributes!(:type=>''Host'')
> => true>> g
>
> => #<Guest id: 418519017, type: "Guest", ...#>
>
> #It seems that this "type" attribute is protected is there a way
to
> by-pass this ?
Yup (and if you check your logs you''d probably see a warning about not
being able to mass assign a protected attribute)

There''s two things you can play with: Directly setting the type
attribute or playing with the becomes method.

Fred
>
> you can find the pastie of the above code here :http://pastie.org/317885
> --
> Posted viahttp://www.ruby-forum.com/.
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Frederick Cheung wrote:
> On Nov 18, 4:35�pm, nico Itkin
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
> wrote:
>> => #<Guest id: 418519017, type: "Guest", ...#>
>> g.update_attributes!(:type=>''Host'')
>> => true>> g
>>
>> => #<Guest id: 418519017, type: "Guest", ...#>
>>
>> #It seems that this "type" attribute is protected is there a
way to
>> by-pass this ?
> Yup (and if you check your logs you''d probably see a warning about
not
> being able to mass assign a protected attribute)
> 
> There''s two things you can play with: Directly setting the type
> attribute or playing with the becomes method.
> 
> Fred
I had found update_attribute_with_validation_skipping which updates the 
protected attribute , but becomes is really what i need !! thanks a lot 
!
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On Nov 18, 5:25 pm, nico Itkin
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
> Frederick Cheung wrote:
>
> I had found update_attribute_with_validation_skipping which updates the
> protected attribute , but becomes is really what i need !! thanks a lot
> !
You don;t need to dig that deep even for updating the attribute - just
foo.type = ''Blah'' would do it.
Mass protection just means that it''s ignored if you do
update_attributes, create, new or things like that.

Fred
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Frederick Cheung wrote:
> On Nov 18, 5:25�pm, nico Itkin
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
> wrote:
>> Frederick Cheung wrote:
>>
>> I had found update_attribute_with_validation_skipping which updates the
>> protected attribute , but becomes is really what i need !! thanks a lot
>> !
> 
> You don;t need to dig that deep even for updating the attribute - just
> foo.type = ''Blah'' would do it.
> Mass protection just means that it''s ignored if you do
> update_attributes, create, new or things like that.
> 
> Fred
Realize that later, get mad cause update_attribute was not working

thanks for the explanation

nico
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I guess it is not the right thing to do. You should use something like
roles and change it, not inheritance.

On Nov 18, 4:09 pm, nico Itkin
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
> Frederick Cheung wrote:
> > On Nov 18, 5:25 pm, nico Itkin
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
> > wrote:
> >> Frederick Cheung wrote:
>
> >> I had found update_attribute_with_validation_skipping which
updates the
> >> protected attribute , but becomes is really what i need !! thanks
a lot
> >> !
>
> > You don;t need to dig that deep even for updating the attribute - just
> > foo.type = ''Blah'' would do it.
> > Mass protection just means that it''s ignored if you do
> > update_attributes, create, new or things like that.
>
> > Fred
>
> Realize that later, get mad cause update_attribute was not working
>
> thanks for the explanation
>
> nico
> --
> Posted viahttp://www.ruby-forum.com/.
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