Thanks for the tip I didn't know you could define the formclass like
that. Definately makes it more readable.
Paddy
On Sep 28, 11:28 pm, Steve Holden <[EMAIL PROTECTED]> wrote:
> Steve Holden wrote:
> > Paddy Joy wrote:
>
> >> I have a model with a 'User' foreign key.
>
> >> class Domain(models.Model):
> >> .
> >> owner = models.ForeignKey(User)
>
> >> I have a requirement to only allow superuers to change the 'owner'
> >> field.
>
> >> I can do this by creating two model forms and excluding the 'owner'
> >> field from one:
>
> >> class DomainForm_superuser(ModelForm):
> >> class Meta:
> >> model = Domain
>
> >> class DomainForm(ModelForm):
> >> class Meta:
> >> model = Domain
> >> exclude = ('owner',)
>
> >> and then in my view I check if the current user is a superuser
>
> >> @login_required()
> >> def update_domain(request, domain_id):
>
> >> d = Domain.objects.get(id=domain_id)
>
> >> if request.method == 'POST':
> >> if request.user.is_superuser:
> >> form = DomainForm_superuser(data=request.POST,
> >> instance=d)
> >> else:
> >> form = DomainForm(data=request.POST,
> >> instance=d)
>
> >> if form.is_valid():
> >> form.save()
> >> return HttpResponseRedirect("/")
> >> else:
> >> if request.user.is_superuser:
> >> form = DomainForm_superuser(instance=d)
> >> else:
> >> form = DomainForm(instance=d)
>
> >> return render_to_response('domain_form.html', {"form": form},
> >> context_instance=RequestContext(request))
>
> >> This works but can anyone suggest a better/more efficient way of doing
> >> this?
>
> > You could make your code slightly more readable by setting the form
> > class initially according to the user's type and then using it without
> > decisions lower down. This should work because the two forms have
> > exactly the same signatures:
>
> > @login_required()
> > def update_domain(request, domain_id):
>
> > d = Domain.objects.get(id=domain_id)
>
> > if request.user.is_superuser:
> > formclass = DomainForm_superuser
> > else:
> > formclass = DomainForm
>
> > if request.method == 'POST':
> > form = formclass(data=request.POST, instance=d)
> > if form.is_valid():
> > form.save()
> > return HttpResponseRedirect("/")
> > else:
> > if request.user.is_superuser:
> > form = formclass(instance=d)
>
> The above should, of course, have read
>
> else:
> form = formclass(instance=d)
>
> Sorry about that.
>
> regards
> Steve
>
> > return render_to_response('domain_form.html', {"form": form},
> > context_instance=RequestContext(request))
>
> > I've tried to adjust your code's indentation to 4-per-level, so pardon me
> > if I've screwed up the logic at the same time. I find 8 spaces makes the
> > code much more difficult to read (especially after being wrapped by an
> > email client).
>
> > regards
> > Steve
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