post - Cannot force an update in save() with no primary key. Horror ! -

i don't know do, i'm 'blank'...

i have function querys database using request.get , fills form, can change contents , save updating information. problem id isn't passed function , django opts insert instead of update, here's code:

look @ mess:

def meet_save(request):   if request.method == 'post':     form = meetingform(request.post)       if form.is_valid():         creator = get_object_or_404(submitter, name=request.user)         meeting = meeting(creator=creator)         meeting.ave = form.cleaned_data['ave']         meeting.st = form.cleaned_data['st']         meeting.date = form.cleaned_data['date']         #it supposed work save()         #i tryed meeting.save(force_update=true)         #and figured out id missing         meeting.save()         people in form.cleaned_data['people']:             meeting.people.add(people)         return httpresponseredirect('/meeting/register/')   elif request.get.has_key('meeting'):     id = request.get['meeting']             people = ''     ave = ''     st = ''     date = ''     try:       meeting = meeting.objects.get(id=id)       #id = unicode(request.get['meeting'])       #have tryed different ways no luck       id = request.get['meeting']       ave = meeting.ave       st = meeting.st       date = meeting.date       except:         pass       form = meetingform({          'id':id, 'ave' : ave, 'st' : st,'date' : date       })   else:     form = meetingform()   variables = requestcontext(request, {       'form': form,   })   return render_to_response('meeting/meeting_save.html', variables) 

it receives meeting=id passed in request (like /meeting/register/meeting=3) , form gets data when saving creates new row instead of updating it,but doesn't wirk in django, maybe php not django !!!

this right code django:

def meet_save(request):   pk=request.get['meeting'] #get meeteng id url   form = meetingform(request.post)   if form.is_valid():     meeting, created = meeting.objects.get_or_create(id=pk)     meeting.ave = form.cleaned_data['ave']     meeting.st = form.cleaned_data['st']     meeting.date = form.cleaned_data['date']     meeting.people = form.claned_data['people']     meeting.save()     #for people in form.cleaned_data['people']:       #meeting.people.add(people)     return httpresponseredirect('/meeting/register/')   else:     meeting = get_object_or_404(meeting, pk=request.get['meeting'])# id passed     form = meetingform(instance=meeting)   variables = requestcontext(request, {         'form': form,   })   return render_to_response('meeting/meeting_save.html', variables) 

i guess mess maybe work fixed template because post this: method=post action="." , figured out url fine when page when sending data in post clears out meeting=id , think real horror!! changed action="" have not seen anithing in documentation , have read it's same, aware it's not.
django rocks !!!

is there reason why aren't using django built-in mechanism fill form associated object? example:

meeting = meeting.objects.get(pk=id) form = meetingform(instance=meeting) 

also, should use django shortcut get_object_or_404 can evade unwanted behavior. so, instead of creating new object, send 404. no harm done.