You can replace URL(...,args=id) with URL(...,vars=dict(id=id)) and
request.args(0) with request.vars.id.
I prefer the more restful syntax but there is no deep reason.
Massimo
On Aug 11, 3:37 pm, __future__ <wrigh...@gmail.com> wrote:
> Thanks a lot for that detailed explanation...
>
> Why do we use args instead of request.vars? Wouldn't using the
> request vars allow using named values in the controller? It is not
> the biggest thing in the world but whenever I see something like args
> (0), I feel like I am reading perl. I hate reading perl. :)
>
> __future__
>
> On Aug 11, 9:43 am, mdipierro <mdipie...@cs.depaul.edu> wrote:
>
> > > if db((db.attendance.event==event_id) &
> > > (db.attendance.user==auth.user.id)).delete():
> > > return 'Not Attending'
> > > else:
> > > db.attendance.insert(event=event_id, user=auth.user.id)
> > > return 'Attending'
>
> > > This obviously works but looks backwards to me for some reason. What
> > > am I missing?
>
> > db().delete() returns the number of affected records. If it returns 0
> > then there are no records to delete and it assumes you meant to insert
> > one, not delete one. This is the same as your code. I just removed the
> > explicit check.
>
> > > In the view:
>
> > > <button id="x{{=item.event.id}}"onclick="ajax(
> > > '{{=URL(r=request,f='toggle_attendance',
> > > args=item.event.id)}}',[],'x{{=item.event.id}}');">
>
> > > Can you step me through what is going on here.
>
> > This is a bit tricky. Say you have an item.event.id==1. Then it make a
> > button
>
> > <button id="x1" onclick="ajax('/yourapp/default/'toggle_attendance/1',
> > [],'x1')">...</button>
>
> > that when clicked sends anajaxrequest to /yourapp/
> > default/'toggle_attendance/1. The /1 implies request.args(0)=1. []
> > means it passes no request.vars. The last argument ofajax(...,'x1')
> > means that the value returned by theajaxfunction goes into the
> > innerHTML of the tag with id=='x1'.
> > So basically when you click the button is calls the server, the server
> > creates or deletes the record and returns the new name for the button.
>
> > > I'm not sure
> > > understand how the helpers work withajax. I get that you are
> > > creating a 'button' and that it is passing the event.id to the toggle
> > > function. I guess my confusion is still the confusion about how the
> > > toggle is deciding what to return. It seems like if it successfully
> > > deletes the attendance record, it returns that there IS an attendance,
> > > and if it inserts an attendance record it returns that is NOT an
> > > attendance. This is not what actually happens so why am I reading it
> > > this way? I also don't understand where what is actually returned is
> > > represented in the view.
>
> > Sorry. I had a type "Unattending" instead of "Attending".
>
> > Hope this makes more sense.
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