How do I use an UpdateView to update a Django Model?

Question

I'm trying to update a model in Django using the class-based generic view UpdateView.

I read the page Updating User model in Django with class based UpdateView to try and get me started, but I'm getting an error 'WSGIRequest' object has no attribute 'id'

I'm a fresh face to Django, so please be forgiving if I'm doing something stupid.

//urls.py

url(r'^portfolios/update/(?P<id>\d+)/$',PortfoliosUpdateView.as_view()), 

//views.py

class PortfoliosUpdateView(UpdateView):     form_class = PortfoliosCreateForm     model = Portfolios     template_name = 'portfolios/create.html'      def get(self, request, **kwargs):         self.object = Portfolios.objects.get(id=self.request.id)         form_class = self.get_form_class()         form = self.get_form(form_class)         context = self.get_context_data(object=self.object, form=form)         return self.render_to_response(context)      def get_object(self, queryset=None):         obj = Portfolios.objects.get(id=self.request.id)         return obj 

It's mostly just a modified version of the code originally posted, but I thought it'd work. I know that I'm trying to retrieve the id passed as a GET parameter, but that doesn't seem to come through in the request variable. Am I going about this the wrong way?

Thanks

Edit: I think I fixed it, but this may be wrong: I changed the lines

self.object = Portfolios.objects.get(id=self.request.id) obj = Portfolios.objects.get(id=self.request.id) 

to

self.object = Portfolios.objects.get(id=self.kwargs['id']) obj = Portfolios.objects.get(id=self.kwargs['id']) 

I could be wrong.

Answer 1

It should be:

def get_object(self, queryset=None):     obj = Portfolios.objects.get(id=self.kwargs['id'])     return obj 

Look at class based generic view dispatch explains that keyword arguments are assigned to self.kwargs.:

def dispatch(self, request, *args, **kwargs):     # Try to dispatch to the right method; if a method doesn't exist,     # defer to the error handler. Also defer to the error handler if the     # request method isn't on the approved list.     if request.method.lower() in self.http_method_names:         handler = getattr(self, request.method.lower(), self.http_method_not_allowed)     else:         handler = self.http_method_not_allowed     self.request = request     self.args = args     self.kwargs = kwargs     return handler(request, *args, **kwargs)