Rails - Dec 2007 - Reading Model data before update

Hi all,

here is the challenge:

I have this validation method, that basically prevents an object which
billed = true to be updated:

  def before_update
    if read_attribute(:billed)
      errors.add_to_base(''This service has already been billed
for'')
    end
    !read_attribute(:billed)
  end

The above code does not work in case I do something like:

object = Model.find(:first)
object.billed = true
object.save

because in my before_update filter I am reading the billed column,
that now has ''true'', so the validation returns false and the
record is
not saved.

The purpose of this validation is to prevent a record that has been
marked billed to be changed. But how then am I going to update billed
to true?

I''ve tried using
self.service.update_attribute(''billed'', true), doest
work. update_attribute_with_validation_skipping returns unknown method
error.

Thanks!
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

On Dec 15, 2007 1:35 AM, felipekk-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
<felipekk-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
>
> Hi all,
>
> here is the challenge:
>
> I have this validation method, that basically prevents an object which
> billed = true to be updated:
>
>   def before_update
>     if read_attribute(:billed)
>       errors.add_to_base(''This service has already been billed
for'')
>     end
>     !read_attribute(:billed)
>   end
>
> The above code does not work in case I do something like:
>
> object = Model.find(:first)
> object.billed = true
> object.save
>
> because in my before_update filter I am reading the billed column,
> that now has ''true'', so the validation returns false and
the record is
> not saved.
>
> The purpose of this validation is to prevent a record that has been
> marked billed to be changed. But how then am I going to update billed
> to true?
>
> I''ve tried using
self.service.update_attribute(''billed'', true), doest
> work. update_attribute_with_validation_skipping returns unknown method
> error.
>
> Thanks!
> >
>
Just find the old one:

old_model = Model.find id

and then verify some stuff on the old model.

Pat

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

I knew it was easy lol

Thanks a lot.

On Dec 15, 3:31 am, "Pat Maddox"
<perg...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> On Dec 15, 2007 1:35 AM, felip...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
<felip...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
>
>
>
>
> > Hi all,
>
> > here is the challenge:
>
> > I have this validation method, that basically prevents an object which
> > billed = true to be updated:
>
> >   def before_update
> >     if read_attribute(:billed)
> >       errors.add_to_base(''This service has already been
billed for'')
> >     end
> >     !read_attribute(:billed)
> >   end
>
> > The above code does not work in case I do something like:
>
> > object = Model.find(:first)
> > object.billed = true
> > object.save
>
> > because in my before_update filter I am reading the billed column,
> > that now has ''true'', so the validation returns false
and the record is
> > not saved.
>
> > The purpose of this validation is to prevent a record that has been
> > marked billed to be changed. But how then am I going to update billed
> > to true?
>
> > I''ve tried using
self.service.update_attribute(''billed'', true), doest
> > work. update_attribute_with_validation_skipping returns unknown method
> > error.
>
> > Thanks!
>
> Just find the old one:
>
> old_model = Model.find id
>
> and then verify some stuff on the old model.
>
> Pat
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---