Question

I am using django forms to add a new objects to the db. The code I currently have is:

if request.method == 'POST':
    form = MyForm(data=request.POST)

    if form.is_valid():
        obj = form.save()
 else:
    form = MyForm()

return render_to_response('reflections/add_reflection.html', {'form':form},context_instance=RequestContext(request))

The code above currently adds a new object each time the form is submitted. What I want to happen is that the object is edited the next time the save button is pressed rather than adding a new record.

How would I do this?

Answer 1

Use

 instance_id = None
 if request.method == 'POST':
    try:
        instance = MyType.objects.get(id=request.POST.get('instance_id'))
    except MyType.DoesNotExist:
        instance = None
    form = MyForm(data=request.POST, instance=instance)

    if form.is_valid():
        obj = form.save()
        instance_id = obj.id
 else:
    form = MyForm(instance=None)

return render_to_response('reflections/add_reflection.html', {'form':form, 'instance_id': instance_id or ''},context_instance=RequestContext(request))

Once the object is saved, pass it’s id in context to page
and add it to a hidden input field inside the form as name=’instance_id’.

Happy Coding.