get_object_or_404 example

views.py

def product_detail(request, slug):
    try:
        product = Product.objects.get(slug=slug)
    except Product.DoesNotExist:
        raise Http404()
    return TemplateResponse(request, 'products/product_detail.html', {
        'product': product,
    })


# Shorter version

def product_detail(request, slug):
    return TemplateResponse(request, 'products/product_detail.html', {
        'product': get_object_or_404(Product.objects.all(), slug=slug),
    })