Create revision for initial question contribution

Without this fix, the initial contribution gets lost in the reversion
history, and the first edit by a moderator is the first one to get
logged, meaning we always lose the user's actual contributed version.

Author: knatten

quiz/models.py

@@ -5,6 +5,7 @@
 from django.core.exceptions import ValidationError
 from django.db import models
 from django.utils import timezone
+import reversion
 
 from quiz import formatting
 
@@ -13,6 +14,7 @@ def generate_preview_key():
     return ''.join(random.sample(string.ascii_lowercase + string.digits, 10))
 
 
+@reversion.register()
 class Question(models.Model):
     RESULT_CHOICES = (
         ('OK', 'The program is guaranteed to output:'),

quiz/views.py

@@ -8,6 +8,8 @@
 from django.shortcuts import get_object_or_404, render
 from django.views.decorators.cache import never_cache
 
+import reversion
+
 from quiz import fixed_quiz
 from quiz.answer import Answer
 from quiz.forms import QuestionForm
@@ -65,9 +67,11 @@ def create(request):
     if request.method == 'POST':
         form = QuestionForm(request.POST)
         if form.is_valid():
-            form.save()
-            mail_admins('Someone made a question!', 'https://' + request.get_host() + '/admin/quiz/question/?state=NEW')
-            return HttpResponseRedirect('/quiz/created')
+            with reversion.create_revision():
+                form.save()
+                reversion.set_comment("User contribution")
+                mail_admins('Someone made a question!', 'https://' + request.get_host() + '/admin/quiz/question/?state=NEW')
+                return HttpResponseRedirect('/quiz/created')
     else:
         form = QuestionForm()
     return render(request, 'quiz/create.html',