On April 5, 2011 08:55:51 am DJ wrote:
> Hi Henry
>
> Goog lord, that is a lot easier - and is, of course, what I tried
> first - but without the self.save. Arg.
>
Sorry, I forgot about that particular ruby quirk that a "self." is required to
change attributes (it continuously bites me), but I didn't think it was needed
on the save. I looked at my code to see if I had a "save" in a transition,
but could not find any because I always write a method that is closer to the
customer's language (e.g. "free_room!").
I'm glad you have it working.
Henry
> 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
--
Henry Baragar
Instantiated Software
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