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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