Django: IndexError at /customerList/ tuple index out of range - django

Question

Can anyone help me with this. I don't understand this error
IndexError at /customerList/
tuple index out of range
and it came from this code
self.Customer = get_object_or_404(customer, name__iexact=self.args[0])
I want to be able to do ListView some of the fields from two forms that is from customerForm (F_NAME, L_NAME) and buildingForm (B_USE, B_TYPE). Any help is very much is very very much appreciated. Thank u.
Traceback:
File "c:\Python27\lib\site-packages\django\core\handlers\base.py" in get_response
111. response = callback(request, *callback_args, **callback_kwargs)
File "c:\Python27\lib\site-packages\django\views\generic\base.py" in view
48. return self.dispatch(request, *args, **kwargs)
File "c:\Python27\lib\site-packages\django\views\generic\base.py" in dispatch
69. return handler(request, *args, **kwargs)
File "c:\Python27\lib\site-packages\django\views\generic\list.py" in get
114. self.object_list = self.get_queryset()
File "f:\iqgit\amon\amonsolution\solution\views.py" in get_queryset
59. self.Customer = get_object_or_404(customer, name__iexact=self.args[0])
Exception Type: IndexError at /customerList/
Exception Value: tuple index out of range
views.py
class customerListView(ListView):
template_name = "customerList.html",
model = customer
context_object_name = "customer_list"
def get_queryset(self):
self.Customer = get_object_or_404(customer, name__iexact=self.args[0])
return building.objects.filter(Customer=self.Customer)
def get_context_data(self, **kwargs):
context = super(customerListView, self).get_context_data(**kwargs)
context['building_list'] = building.objects.all()
return context
forms.py
class customerForm(forms.ModelForm):
F_NAME = forms.CharField(widget=forms.TextInput()
L_NAME = forms.CharField(widget=forms.TextInput()
EMAIL = forms.CharField(widget=forms.TextInput()
ADD = forms.CharField(widget=forms.TextInput()
class Meta:
model = customer
class buildingForm(forms.ModelForm):
CUSTOMER = forms.CharField(widget=forms.TextInput()
B_FLOORSPACE = forms.CharField(widget=forms.TextInput()
B_YEAR = forms.CharField(widget=forms.TextInput()
B_USE = forms.ChoiceField(widget=forms.RadioSelect(), choices=c.Use)
B_TYPE = forms.ChoiceField(widget=forms.RadioSelect(), choices=c.Type)
class Meta:
model = building
exclude = ('CUSTOMER',)
urls.py
url(r'^customerList/',customerListView.as_view(), name= "customerList_view"),
customerList.html
...some of code...
{% for customer in customer_list %}
<tr class = {% cycle "row_even" "row_odd" %}>
<td>{{ customer.id }}</td>
<td class ="name"> {{ customer.F_NAME }} {{ customer.L_NAME }}</td>
<td class ="b_use"> {{ building.B_USE }}{{ building.B_TYPE }}</td>
...some of code...

Answer 1

You are trying to call a positional argument (self.args[0]) passed from the URL conf but you haven't added any positional arguments to your actual url. If you look at how a request is processed, you will notice that:
4 . Once one of the [url] regexes matches, Django imports and calls the given view, which is a simple Python function. The view gets passed an HttpRequest as its first argument and any values captured in the regex as remaining arguments.
You aren't passing any arguments (neither positional or named) to your view so there is nothing in self.args or self.kwargs. You need to change your URL to something like:
url(r'^customerList/(\w+)/',customerListView.as_view(), name= "customerList_view"),
or ideally make use of named arguments such as:
url(r'^customerList/(?P<name>\w+)/',customerListView.as_view(), name= "customerList_view"),
so that you can instead use self.kwargs.get("name", None)