Django IndexError at / list index out of range










0















I was having problems migrating and when it finally worked this appeared on the home page. Some of the other pages work, and it seems to just be the home page.



Error Messages:



Internal Server Error: /
Traceback (most recent call last):
File "C:Userspcformula_zonelibsite-
packagesdjangocorehandlersexception.py", line 34, in inner
response = get_response(request)
File "C:Userspcformula_zonelibsite-
packagesdjangocorehandlersbase.py", line 126, in _get_response
response = self.process_exception_by_middleware(e, request)
File "C:Userspcformula_zonelibsite-
packagesdjangocorehandlersbase.py", line 124, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:UserspcDownloadsformula_zonemysiteracingviews.py", line 15,
in racing_stats
ra = races[0]
File "C:Userspcformula_zonelibsite-packagesdjangodbmodelsquery.py",
line 303, in __getitem__
return qs._result_cache[0]
IndexError: list index out of range


I think its on the views.py so here's that code as well.



def racing_stats(request, race_id=None):
drivers = Driver.objects.all().order_by('lap_time')
races = Race.objects.all()
for racer in drivers:
driver_controller.update_race_time(racer)

if race_id:
ra = Race.objects.get(rac_id=race_id)
else:
ra = races[0]

buttons =
for r in races:
buttons.append((r.rac_id, r.race_name))
context =
'drivers': drivers,
'active_race': ra,
'buttons': buttons

return render(request, 'racing/racing_stats.html', context)


def race_list(request):
races = Race.objects.all()

context =
'races': races,


return render(request, 'racing/races.html', context)


def race_detail(request, pk):
race_ds = get_object_or_404(Race, pk=pk)
print(race_ds)
return render(request, 'racing/race_detail.html',
'race_detail': race_ds)









share|improve this question

















  • 2





    ra = races[0] is the problematic line. Looks like Race.objects.all() returns an empty queryset.

    – Dušan Maďar
    Nov 15 '18 at 9:16












  • Thank you! I had to delete my database, so that may explain that problem. Going to add some items in there and then check

    – Max Loyd
    Nov 15 '18 at 9:18















0















I was having problems migrating and when it finally worked this appeared on the home page. Some of the other pages work, and it seems to just be the home page.



Error Messages:



Internal Server Error: /
Traceback (most recent call last):
File "C:Userspcformula_zonelibsite-
packagesdjangocorehandlersexception.py", line 34, in inner
response = get_response(request)
File "C:Userspcformula_zonelibsite-
packagesdjangocorehandlersbase.py", line 126, in _get_response
response = self.process_exception_by_middleware(e, request)
File "C:Userspcformula_zonelibsite-
packagesdjangocorehandlersbase.py", line 124, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:UserspcDownloadsformula_zonemysiteracingviews.py", line 15,
in racing_stats
ra = races[0]
File "C:Userspcformula_zonelibsite-packagesdjangodbmodelsquery.py",
line 303, in __getitem__
return qs._result_cache[0]
IndexError: list index out of range


I think its on the views.py so here's that code as well.



def racing_stats(request, race_id=None):
drivers = Driver.objects.all().order_by('lap_time')
races = Race.objects.all()
for racer in drivers:
driver_controller.update_race_time(racer)

if race_id:
ra = Race.objects.get(rac_id=race_id)
else:
ra = races[0]

buttons =
for r in races:
buttons.append((r.rac_id, r.race_name))
context =
'drivers': drivers,
'active_race': ra,
'buttons': buttons

return render(request, 'racing/racing_stats.html', context)


def race_list(request):
races = Race.objects.all()

context =
'races': races,


return render(request, 'racing/races.html', context)


def race_detail(request, pk):
race_ds = get_object_or_404(Race, pk=pk)
print(race_ds)
return render(request, 'racing/race_detail.html',
'race_detail': race_ds)









share|improve this question

















  • 2





    ra = races[0] is the problematic line. Looks like Race.objects.all() returns an empty queryset.

    – Dušan Maďar
    Nov 15 '18 at 9:16












  • Thank you! I had to delete my database, so that may explain that problem. Going to add some items in there and then check

    – Max Loyd
    Nov 15 '18 at 9:18













0












0








0








I was having problems migrating and when it finally worked this appeared on the home page. Some of the other pages work, and it seems to just be the home page.



Error Messages:



Internal Server Error: /
Traceback (most recent call last):
File "C:Userspcformula_zonelibsite-
packagesdjangocorehandlersexception.py", line 34, in inner
response = get_response(request)
File "C:Userspcformula_zonelibsite-
packagesdjangocorehandlersbase.py", line 126, in _get_response
response = self.process_exception_by_middleware(e, request)
File "C:Userspcformula_zonelibsite-
packagesdjangocorehandlersbase.py", line 124, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:UserspcDownloadsformula_zonemysiteracingviews.py", line 15,
in racing_stats
ra = races[0]
File "C:Userspcformula_zonelibsite-packagesdjangodbmodelsquery.py",
line 303, in __getitem__
return qs._result_cache[0]
IndexError: list index out of range


I think its on the views.py so here's that code as well.



def racing_stats(request, race_id=None):
drivers = Driver.objects.all().order_by('lap_time')
races = Race.objects.all()
for racer in drivers:
driver_controller.update_race_time(racer)

if race_id:
ra = Race.objects.get(rac_id=race_id)
else:
ra = races[0]

buttons =
for r in races:
buttons.append((r.rac_id, r.race_name))
context =
'drivers': drivers,
'active_race': ra,
'buttons': buttons

return render(request, 'racing/racing_stats.html', context)


def race_list(request):
races = Race.objects.all()

context =
'races': races,


return render(request, 'racing/races.html', context)


def race_detail(request, pk):
race_ds = get_object_or_404(Race, pk=pk)
print(race_ds)
return render(request, 'racing/race_detail.html',
'race_detail': race_ds)









share|improve this question














I was having problems migrating and when it finally worked this appeared on the home page. Some of the other pages work, and it seems to just be the home page.



Error Messages:



Internal Server Error: /
Traceback (most recent call last):
File "C:Userspcformula_zonelibsite-
packagesdjangocorehandlersexception.py", line 34, in inner
response = get_response(request)
File "C:Userspcformula_zonelibsite-
packagesdjangocorehandlersbase.py", line 126, in _get_response
response = self.process_exception_by_middleware(e, request)
File "C:Userspcformula_zonelibsite-
packagesdjangocorehandlersbase.py", line 124, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:UserspcDownloadsformula_zonemysiteracingviews.py", line 15,
in racing_stats
ra = races[0]
File "C:Userspcformula_zonelibsite-packagesdjangodbmodelsquery.py",
line 303, in __getitem__
return qs._result_cache[0]
IndexError: list index out of range


I think its on the views.py so here's that code as well.



def racing_stats(request, race_id=None):
drivers = Driver.objects.all().order_by('lap_time')
races = Race.objects.all()
for racer in drivers:
driver_controller.update_race_time(racer)

if race_id:
ra = Race.objects.get(rac_id=race_id)
else:
ra = races[0]

buttons =
for r in races:
buttons.append((r.rac_id, r.race_name))
context =
'drivers': drivers,
'active_race': ra,
'buttons': buttons

return render(request, 'racing/racing_stats.html', context)


def race_list(request):
races = Race.objects.all()

context =
'races': races,


return render(request, 'racing/races.html', context)


def race_detail(request, pk):
race_ds = get_object_or_404(Race, pk=pk)
print(race_ds)
return render(request, 'racing/race_detail.html',
'race_detail': race_ds)






python django






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share|improve this question










asked Nov 15 '18 at 9:14









Max LoydMax Loyd

559




559







  • 2





    ra = races[0] is the problematic line. Looks like Race.objects.all() returns an empty queryset.

    – Dušan Maďar
    Nov 15 '18 at 9:16












  • Thank you! I had to delete my database, so that may explain that problem. Going to add some items in there and then check

    – Max Loyd
    Nov 15 '18 at 9:18












  • 2





    ra = races[0] is the problematic line. Looks like Race.objects.all() returns an empty queryset.

    – Dušan Maďar
    Nov 15 '18 at 9:16












  • Thank you! I had to delete my database, so that may explain that problem. Going to add some items in there and then check

    – Max Loyd
    Nov 15 '18 at 9:18







2




2





ra = races[0] is the problematic line. Looks like Race.objects.all() returns an empty queryset.

– Dušan Maďar
Nov 15 '18 at 9:16






ra = races[0] is the problematic line. Looks like Race.objects.all() returns an empty queryset.

– Dušan Maďar
Nov 15 '18 at 9:16














Thank you! I had to delete my database, so that may explain that problem. Going to add some items in there and then check

– Max Loyd
Nov 15 '18 at 9:18





Thank you! I had to delete my database, so that may explain that problem. Going to add some items in there and then check

– Max Loyd
Nov 15 '18 at 9:18












1 Answer
1






active

oldest

votes


















0














Try something like this:



ra = None
if race_id:
ra = Race.objects.get(rac_id=race_id)
elif races:
ra = races[0]


and don't forget to handle None ra in your template.






share|improve this answer






















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    1 Answer
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    1 Answer
    1






    active

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    active

    oldest

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    active

    oldest

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    0














    Try something like this:



    ra = None
    if race_id:
    ra = Race.objects.get(rac_id=race_id)
    elif races:
    ra = races[0]


    and don't forget to handle None ra in your template.






    share|improve this answer



























      0














      Try something like this:



      ra = None
      if race_id:
      ra = Race.objects.get(rac_id=race_id)
      elif races:
      ra = races[0]


      and don't forget to handle None ra in your template.






      share|improve this answer

























        0












        0








        0







        Try something like this:



        ra = None
        if race_id:
        ra = Race.objects.get(rac_id=race_id)
        elif races:
        ra = races[0]


        and don't forget to handle None ra in your template.






        share|improve this answer













        Try something like this:



        ra = None
        if race_id:
        ra = Race.objects.get(rac_id=race_id)
        elif races:
        ra = races[0]


        and don't forget to handle None ra in your template.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Nov 15 '18 at 10:24









        Mohammad UmairMohammad Umair

        2,1831721




        2,1831721





























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