UpdateView is missing a QuerySet Error - django

Question

As of today, my UpdateView no longer works. Whenever I select the icon to edit an item I get the following error:
EntryUpdate is missing a QuerySet. Define EntryUpdate.model, EntryUpdate.queryset, or override EntryUpdate.get_queryset().
I have never had to have a QuerySet within my UpdateView before, so I am unsure why it is asking for one now. My understanding of the Generic UpdateView is that the self-query was built in, but I may be wrong.
Any help would be much appreciated.
views.py
class IndexView(generic.ListView):
template_name = 'argent/index.html'
# paginate_by = 10
def get_queryset(self):
return Entry.objects.all()
def get_context_data(self, **kwargs):
ctx = super(IndexView, self).get_context_data(**kwargs)
# TODAY'S ENTRY
ctx['entry_qs'] = Entry.objects.filter(date=today_date)
# CURRENT SAVINGS TOTALS
ctx['savings_qs'] = Savings.objects.filter(id=1)
# MONTHLY TOTALS
# November
ctx['November16_qs'] = MonthYear.objects.filter(month='November')
# December
ctx['December16_qs'] = MonthYear.objects.filter(month='December')
# January
ctx['January17_qs'] = MonthYear.objects.filter(month='January')
# February
ctx['February17_qs'] = MonthYear.objects.filter(month='February')
# March
ctx['March17_qs'] = MonthYear.objects.filter(month='March')
# # April
# ctx['April_qs'] = MonthYear.objects.filter(month='April')
# # May
# ctx['May_qs'] = MonthYear.objects.filter(month='May')
return ctx
class DetailView(generic.DetailView):
model = Entry
template_name = 'argent/detail.html'
#
# def get_context_data(self, **kwargs):
# ctx = super(DetailView, self).get_context_data(**kwargs)
# ctx['savings_qs'] = Savings.objects.filter(id=1)
# return ctx
class EntryCreate(CreateView):
form_class = EntryForm
template_name = 'argent/entry_form.html'
def form_valid(self, form):
if form.save(self):
# total_euros_spent
sum_euros = Entry.objects.aggregate(s=Sum('euros_sum')).get('s')
sum_euros_f = "{0:.2f}".format(sum_euros)
# total_dollars_spent
sum_dollars = Entry.objects.aggregate(s=Sum('dollars_sum')).get('s')
sum_dollars_f = "{0:.2f}".format(sum_dollars)
# total_sum
sum_savings = Entry.objects.aggregate(s=Sum('daily_savings_dollars')).get('s')
sum_format = "{0:.2f}".format(sum_savings)
# total_sum_format
sum_abs_savings = Entry.objects.aggregate(s=Sum('daily_savings_dollars')).get('s')
absolute = abs(sum_abs_savings)
sum_abs = "{0:.2f}".format(absolute)
Savings.objects.filter(id=1).update(total_savings=sum_format, total_savings_display=sum_abs,
total_spent_dollars=sum_dollars_f, total_spent_euros=sum_euros_f)
return super(EntryCreate, self).form_valid(form)
else:
return self
class EntryUpdate(UpdateView):
form_class = EntryForm
template_name = 'argent/entry_form.html'
def form_valid(self, form):
if form.save(self):
# total_euros_spent
sum_euros = Entry.objects.aggregate(s=Sum('euros_sum')).get('s')
sum_euros_f = "{0:.2f}".format(sum_euros)
# total_dollars_spent
sum_dollars = Entry.objects.aggregate(s=Sum('dollars_sum')).get('s')
sum_dollars_f = "{0:.2f}".format(sum_dollars)
# total_sum
sum_savings = Entry.objects.aggregate(s=Sum('daily_savings_dollars')).get('s')
sum_format = "{0:.2f}".format(sum_savings)
# total_sum_format
sum_abs_savings = Entry.objects.aggregate(s=Sum('daily_savings_dollars')).get('s')
absolute = abs(sum_abs_savings)
sum_abs = "{0:.2f}".format(absolute)
Savings.objects.filter(id=1).update(total_savings=sum_format, total_savings_display=sum_abs, total_spent_dollars=sum_dollars_f, total_spent_euros=sum_euros_f)
return super(EntryUpdate, self).form_valid(form)
else:
return self
urs.py
urlpatterns = [
url(r'^$', views.IndexView.as_view(), name='index'),
url(r'entry/detail/(?P<pk>[0-9]+)/$', views.DetailView.as_view(), name='detail'),
url(r'entry/add/$', views.EntryCreate.as_view(), name='entry-add'),
url(r'entry/update/(?P<pk>[0-9]+)/$', views.EntryUpdate.as_view(), name='entry-update'),
]
template
{% if object_list %}
{% for Entry in object_list %}
<div class="col-md-3 col-sm-4 col-xs-6">
<div class="thumbnail" style="background: #ebebeb" >
<h3 align="center" style="font-weight: bold; color: #337ab7;">{{ Entry.date }}</h3>
<div class="caption">
<h4 align="center" style="color: #FF5A09">€{{ Entry.euros_sum }}
<!-- View Details -->
<a href="{% url 'argent:detail' Entry.id %}"><button type="button" class="btn btn-link btn-lg">
<span class="glyphicon glyphicon-info-sign" aria-hidden="true"></span>
</button></a>
<!-- Update -->
<a href="{% url 'argent:entry-update' Entry.id %}"><button type="button" class="btn btn-link btn-lg" style="padding: 0">
<span class="glyphicon glyphicon-pencil" aria-hidden="true"></span>
</button>
</a>
</h4>
</div>
</div>
</div>
{% endfor %}
{% endif %}

Answer 1

SOLUTION:
Fixed it. It turns out I accidentally deleted model=Entry from the view. Once I added it back, it started to work again.
class EntryUpdate(UpdateView):
model = Entry
form_class = EntryForm
template_name = 'argent/entry_form.html'
def form_valid(self, form):
....