Negative indexing is not supported in django - django

Question

I am trying to upload image and show the same in my site but instead i am getting this error
my current django-mptt version is 0.5.1
views.py-
def home(request):
print('here you go ')
images=[]
images=image_classification.objects.all()
url=images[len(images)-1].pic.url
return render(request,'home.html',{'print':'everything is ok','image':url})
#handles uploaded images
def uploadImage(request):
print('image handling ')
img= request.FILES['image']
image=image_classification(pic=img)
image.save()
return HttpResponseRedirect('/')
inside models.py
from django.db import models
class image_classification(models.Model):
pic=models.ImageField(upload_to='images')
and the error i am facing
Traceback (most recent call last):
File "C:\Users\prasa\Desktop\Pytorch-Django\venv\Lib\site-packages\django\core\handlers\exception.py", line 55, in inner
response = get_response(request)
File "C:\Users\prasa\Desktop\Pytorch-Django\venv\Lib\site-packages\django\core\handlers\base.py", line 197, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\prasa\Desktop\Pytorch-Django\MainApp\ImageClassifier\views.py", line 10, in home
url=images[len(images)-1].pic.url
File "C:\Users\prasa\Desktop\Pytorch-Django\venv\Lib\site-packages\django\db\models\query.py", line 425, in __getitem__
raise ValueError("Negative indexing is not supported.")
Exception Type: ValueError at /
Exception Value: Negative indexing is not supported.

Answer 1

images is empty (the queryset).you could handle if by using IF statment.
def home(request):
print('here you go ')
images=[]
images=image_classification.objects.all()
if len(imgaes) > 0:
url=images[len(images)-1].pic.url
else:
url="place holder image url"
return render(request,'home.html',{'print':'everything is ok','image':url})