Django UpdateView get name error: pk is not defined - django

Question

I get a name error: pk is not defined although I can see that the pk is passed to the view from the url.
urls.py:
from django.conf.urls import url
from cashflow.views import cashflowView, SelectAccountView, CashflowEditView
from django.urls import path
app_name = 'cashflow'
urlpatterns = [
url(r'^select_account', SelectAccountView.as_view(), name="select_account"),
url(r'^$', cashflowView.as_view(), name="cashflow_processing"),
path('edit/<pk>/', CashflowEditView.as_view(), name="cashflow_editing"),
]
views.py:
class CashflowEditView(UpdateView):
model = ttransactions
template_name = 'cashflow/cashflow_processing.html'
form_class = CashflowForm
success_url = 'cashflow'
def get_form_kwargs(self):
kwargs = super(CashflowEditView, self).get_form_kwargs()
kwargs['request'] = self.request
return kwargs
def get_queryset(self, **kwargs):
transaction = ttransactions.objects.filter(pk=pk)
transaction_lines = transaction_lines.objects.filter(transaction=transaction.id)
return transaction, transaction_lines
I get the error on the line transaction = ttransactions.objects.filter(pk=pk)
When I run in debug I can see that pk is send to the view but when I use it on the object I get the error.
I will appreciate help to resolve the problem for me.
I added the print(kwargs) as specified and got this in the terminal:
Internal Server Error: /cashflow/edit/42/
Traceback (most recent call last):
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\core\handlers\exception.py", line 4
7, in inner
response = get_response(request)
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\core\handlers\base.py", line 179, i
n _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\views\generic\base.py", line 70, in
view
return self.dispatch(request, *args, **kwargs)
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\views\generic\base.py", line 98, in
dispatch
return handler(request, *args, **kwargs)
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\views\generic\edit.py", line 189, i
n get
self.object = self.get_object()
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\views\generic\detail.py", line 30,
in get_object
queryset = self.get_queryset()
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\aberni\cashflow\views.py", line 274, in get_queryset
transaction = ttransactions.objects.filter(pk=pk)
NameError: name 'pk' is not defined
[06/Jan/2021 16:01:25] "GET /cashflow/edit/42/ HTTP/1.1" 500 86062
Internal Server Error: /favicon.ico/
Traceback (most recent call last):
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\db\models\fields\__init__.py", line
1774, in get_prep_value
return int(value)
ValueError: invalid literal for int() with base 10: 'favicon.ico'
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\core\handlers\exception.py", line 4
7, in inner
response = get_response(request)
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\core\handlers\base.py", line 179, i
n _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\views\generic\base.py", line 70, in
view
return self.dispatch(request, *args, **kwargs)
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\views\generic\base.py", line 98, in
dispatch
return handler(request, *args, **kwargs)
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\views\generic\detail.py", line 106,
in get
self.object = self.get_object()
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\views\generic\detail.py", line 36,
in get_object
queryset = queryset.filter(pk=pk)
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\db\models\query.py", line 942, in f
ilter
return self._filter_or_exclude(False, *args, **kwargs)
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\db\models\query.py", line 962, in _
filter_or_exclude
clone._filter_or_exclude_inplace(negate, *args, **kwargs)
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\db\models\query.py", line 969, in _
filter_or_exclude_inplace
self._query.add_q(Q(*args, **kwargs))
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\db\models\sql\query.py", line 1358,
in add_q
clause, _ = self._add_q(q_object, self.used_aliases)
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\db\models\sql\query.py", line 1377,
in _add_q
child_clause, needed_inner = self.build_filter(
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\db\models\sql\query.py", line 1319,
in build_filter
condition = self.build_lookup(lookups, col, value)
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\db\models\sql\query.py", line 1165,
in build_lookup
lookup = lookup_class(lhs, rhs)
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\db\models\lookups.py", line 24, in
__init__
self.rhs = self.get_prep_lookup()
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\db\models\lookups.py", line 76, in
get_prep_lookup
return self.lhs.output_field.get_prep_value(self.rhs)
File "C:\Users\94ber\PycharmProjects\pythonProject\dev\venv\lib\site-packages\django\db\models\fields\__init__.py", line
1776, in get_prep_value
raise e.__class__(
ValueError: Field 'id' expected a number but got 'favicon.ico'.
[06/Jan/2021 16:01:26] "GET /favicon.ico/ HTTP/1.1" 500 138586

Answer 1

transaction = ttransactions.objects.filter(pk=pk)
Where are you getting the variable pk from? Are you expecting it to come from kwargs? If so then it should be:
transaction = ttransactions.objects.filter(pk=kwargs['pk'])

Answer 2

You have to fetch pk value from kwargs dictionary.
Try this:
def get_queryset(self, **kwargs):
pk = int(kwargs['pk'])
transaction = ttransactions.objects.filter(pk=pk)
transaction_lines = transaction_lines.objects.filter(transaction=transaction.id)
return transaction, transaction_lines