Hi Henry
Goog lord, that is a lot easier - and is, of course, what I tried
first - but without the self.save. Arg.
Thanks
Final code simply reads:
transition :disharge_patient, { :admitted => :discharged } ,
:available_to => :all do
self.location_id = nil
self.save
end
Easy.
On Apr 5, 1:31 pm, Henry Baragar <[email protected]>
wrote:
> On April 5, 2011 07:18:49 am DJ wrote:
>
>
>
>
>
> > Having not got a reply to this, perhaps I should add something about
> > what I already tried ... ?
>
> > My sense from the Hobo documentation is that the important thing is to
> > keep model-related stuff in the model, so I assume that the changing
> > the value of a field during a transition involves an assignment within
> > a method in the model.rb file.
>
> > So ... I did an assignment to what I thought would be the instance
> > variable of the current patient as so ...
>
> > transition :disharge_patient, { :admitted => :discharged },
>
> > :available_to => :all do
>
> > @patient.location_id = nil
> > end
>
> Two things:
> The "do" blocks works on the current object (a patient in this case) so you
> can call its methods directly, namely: "location_id = nil" (or "location =
> nil").
> The assignment works on on the object in memory: you have to save the object
> after making the assignment (i.e. "save")
> Regards,
> Henry
>
>
>
>
>
> > but that doesn't work since it thinks location_id is a method ... and
> > the console tells me @patient is not defined.
>
> > I've tried a few other things within the Lifecycle statement - but
> > most of them crash, indicating that I'm a Ruby-Noobie.
>
> > Any help on this gratefully received. I'm a bit stuck on this.
>
> > Thanks
>
> > DJ
>
> > On Apr 4, 12:46 am, DJ <[email protected]> wrote:
> > > Apologies if this is ridiculously straightforward - my learning-curve
> > > is near vertical and I've got a bit lost on the Hobo/Rails cliff-face
> > > (but enjoying it). Thanks in advance to any suggestions.
>
> > > I have a very simple patient database with a lifecycle which holds
> > > whether the patient is admitted or discharged - this is working
> > > wonderfully using TablePlus and <transition-buttons/>.
>
> > > However, I want to 'blank-out' (set to nil probably) the location
> > > when a patient is discharged.
>
> > > My question is how best to do this.
>
> > > Any help gratefully received. Many thanks
>
> > > DJ
>
> > > __________________________
>
> > > Relevant code in patient.rb is as follows:
>
> > > class Patient < ActiveRecord::Base
>
> > > hobo_model # Don't put anything above this
>
> > > fields do
> > > first_name :string
> > > last_name :string
> > > # etc - field-list cut for clarity ...
> > > timestamps
> > > end
>
> > > belongs_to :location
> > > # etc - other relationships cut for clarity
>
> > > lifecycle :state_field => :admission_status do
>
> > > state :admitted
> > > state :discharged , :default => true
>
> > > transition :admit_patient, { :discharged => :admitted } , :params
> > > => [ :location ] ,
> > > :available_to => :all do
>
> > > end
>
> > > transition :disharge_patient, { :admitted => :discharged },
> > > :available_to => :all do
>
> > > end
>
> > > end
>
> --
> Henry Baragar
> Instantiated Software
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