I could handle it better, but by catching the exception I get a list of
all of the reservations that are 'in the way'
In the view code:
try:
new_reservation =
server.add_reservation(trainer=trainer,start=start,end=end)
except AlreadyReserved, e:
error = 'Please choose another server, %s' % e
Then I use the normail error display to tell the user its already
reserved.
I have to run, but I can post a full example if you need it
Thanks,
-Aaron
JirkaJ wrote:
> Hi Aaron,
> i have one question-how do u handle AlreadyReserved exception? I woould
> like to make some checks before saving some things in admin interface
> but i dont know how may i tell the user that there is some error...
>
>
> Aaron wrote:
> > I just wanted to drop a note about a new app that I deployed.
> >
> > I recently launched a prototype and users are happy.
> >
> > Basically it uses the gamespy API to query gamespy for a list of active
> > game servers, then contacts each server in turn to obtain critical
> > stats (map being player, number of players, scores....)
> >
> > Players can come to the website and reserve a particular server for a
> > number of hours.
> >
> > The players then get a unique URL that they can pass around. Going to
> > the URL will start the game and connect you to the reserved server.
> >
> > All that happens in 121 python statements outside of django (according
> > to pylint).
> >
> > All of the heavy lifting (gamespy, activeX, apache/http) was done in C,
> > but all of the business logic was handled in Python.
> >
> > After this little project I'm starting to get the model API.
> >
> > I thought this bit was tricky, so I'll share:
> >
> > English:
> > If you try to make a reservation but that server is already reserved
> > for any part of the time period then that reservation should fail,
> > unless you are the person that made the original reservation.
> >
> > Django:
> > class Reservation(meta.Model):
> > ....
> > def _pre_save(self):
> > '''A server is already reserved if there is another reservation
> > with a start of end date in the
> > same range as the new reservation'''
> > from django.models.regservers import AlreadyReserved,
> > reservations, servers
> > from django.core.meta import Q
> > server = servers.get_object(id__exact=self.server_id)
> > blockers = server.get_reservation_list(complex=(
> > Q(start__range=(self.start,self.end)) |
> >
> > Q(end__range=(self.start,self.end)) ) )
> > # custom logic to determine if I need to stop the reservation
> > blockers = [b for b in blockers if b.user <> self.user]
> > if len(blockers)>0:
> > raise AlreadyReserved(blockers)
> >
> >
> > It needs a little finishing, like transactional support and error
> > handling - but so far the system works really well and is agile in
> > every sense of the word.
> >
> > Thanks again,
> > -Aaron Held
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Django users" group.
To post to this group, send email to django-users@googlegroups.com
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/django-users
-~----------~----~----~----~------~----~------~--~---
