How to fix request.META.HTTP_REFERER reading error?

Question

Django

Hello, I want to change the variable in views by the presence of a specific referrer with the following code:

def startpage(request):
    success = False
    if request.META.HTTP_REFERER == 'http://127.0.0.1:8000/success':
        success = True
    return render(request, './index.html', {'success': success})

I placed a button on the page http://127.0.0.1:8000/successthat redirects to http://127.0.0.1:8000, i.e. to the start page displayed by startpage() By clicking on the button, an error page is displayed with the following content:
<a href="./">To start page</a>

AttributeError at /
'dict' object has no attribute 'HTTP_REFERER'

But moving a little lower down the page with the Django error, I see this:

Added print request.META to the beginning of the startpage method:

Please tell me where the jamb is in my implementation, how to fix it, or maybe some other options for implementing this idea, thanks to everyone in advance

Answer 1

request.META['HTTP_REFERER']