Fixes for django 4 (remove is_ajax)

longs/views.py

@@ -590,7 +590,7 @@ def create_examination(request):
 
 @csrf_exempt
 def get_examination_id(request):
-    if request.is_ajax():
+    if request.accepts("application/json")():
         examination_name = request.GET["examination_name"]
         examination_id = Examination.objects.get(name=examination_name).id
         data = {
@@ -1210,7 +1210,7 @@ class UserAnswerDelete(SuperuserRequiredMixin, DeleteView):
 
 @user_passes_test(lambda u: u.is_superuser)
 def user_answer_delete_multiple(request):
-    if request.is_ajax():
+    if request.accepts("application/json")():
         answer_ids = json.loads(request.POST["answer_ids"])
 
         # We could probably delete them all at once....
@@ -1244,7 +1244,7 @@ def question_review(request, pk):
     """
     Return a json representation of the question when the exam is active
     """
-    if request.is_ajax():
+    if request.accepts("application/json")():
         exam = get_object_or_404(Exam, pk=pk)
 
         if not exam.publish_results: