Django: Why am I getting a Value Error?

Question

The variables are defined before the if statement.

if (len(Item.objects.filter(owner=request.session['id'])) > 0):
    for x in Item.objects.filter(owner=request.session['id']):
        if (x.item == forageitem):
            x.amount = x.amount + 1
            x.save()
            messages.success(request, "You found a " + forageitem +".")
            return redirect("/dashboard")
        else:
            continue

The function passes through the if statement just fine, but if the item in question is not found, it will not create a new object in the Item class, instead it will give me an error.

For some reason, I am getting a ValueError (didn't get an HttpResponse. Instead it reutunred None.) at this part of my code:

else:
    Item.objects.create(item=forageitem, owner=User.objects.get(id = request.session['id']), description=item[forageitem], amount=1)
    messages.success(request, "You found a " + forageitem +".")
    return redirect("/dashboard")

I am almost certain I didn't change anything here, it was working before. Ideas, anyone? Please help.

EDIT: The problem turned out to be int the logic. I erased the else: statement and made it into a code that runs if it passes through the if: statement without finding anything.