from django.shortcuts import render
from tidings.models import Watch
[docs]def unsubscribe(request, watch_id):
"""Unsubscribe from (i.e. delete) the watch of ID ``watch_id``.
Expects an ``s`` querystring parameter matching the watch's secret.
GET will result in a confirmation page (or a failure page if the secret is
wrong). POST will actually delete the watch (again, if the secret is
correct).
The templates assume use of the Jinja templating engine via jingo.Loader
and the presence of a ``base.html`` template containing a ``content``
block.
If you aren't using Jinja via jingo.Loader, you can replace the templates
with your own django templates.
"""
# Grab the watch and secret; complain if either is wrong:
try:
watch = Watch.objects.get(pk=watch_id)
# 's' is for 'secret' but saves wrapping in mails
secret = request.GET.get('s')
if secret != watch.secret:
raise Watch.DoesNotExist
except Watch.DoesNotExist:
return render(request, 'tidings/unsubscribe_error.html')
if request.method == 'POST':
watch.delete()
return render(request, 'tidings/unsubscribe_success.html')
return render(request, 'tidings/unsubscribe.html')