Implement HTMX support for CID and User candidates lists, and add submitted candidates summary

generic/views.py

@@ -2183,23 +2183,20 @@ class ExamViews(View, LoginRequiredMixin):
             if not request.user.is_superuser:
                 raise PermissionDenied
 
-        cid_users = (
-            exam.valid_cid_users.all()
-        )  # .order_by("cid")#.prefetch_related("*")
-        cid_user_count = len(cid_users)
+        # Avoid loading large querysets here — the detailed lists are
+        # rendered by HTMX partials which will fetch the data separately.
+        cid_user_count = exam.valid_cid_users.count()
+        user_user_count = exam.valid_user_users.count()
 
-        user_users = exam.valid_user_users.all()  # .order_by("username")
-        user_user_count = len(user_users)
-
-        user_exam_data = exam.cid_users.all().prefetch_related("cid_user", "user_user")
+        # Provide a lightweight indicator if there are any submissions so the
+        # template can decide whether to load the submitted-list partial.
+        has_submissions = exam.cid_users.exists()
 
         context = {
             "exam": exam,
-            "cid_users": cid_users,
             "cid_user_count": cid_user_count,
-            "user_exam_data": user_exam_data,
-            "user_users": user_users,
             "user_user_count": user_user_count,
+            "has_submissions": has_submissions,
             "app_name": self.app_name,
         }
 
@@ -2208,6 +2205,36 @@ class ExamViews(View, LoginRequiredMixin):
 
         return render(request, "exam_cids.html", context)
 
+    def exam_cids_cid_list(self, request, exam_id):
+        """HTMX partial returning the CID candidates list for an exam."""
+        exam = get_object_or_404(self.Exam, pk=exam_id)
+        if request.user not in exam.author.all() and not request.user.is_superuser:
+            raise PermissionDenied
+
+        cid_users = exam.valid_cid_users.all()
+
+        return render(request, "generic/partials/exam_cids_cid_list.html", {"cid_users": cid_users, "exam": exam})
+
+    def exam_cids_user_list(self, request, exam_id):
+        """HTMX partial returning the User candidates list for an exam."""
+        exam = get_object_or_404(self.Exam, pk=exam_id)
+        if request.user not in exam.author.all() and not request.user.is_superuser:
+            raise PermissionDenied
+
+        user_users = exam.valid_user_users.all()
+
+        return render(request, "generic/partials/exam_cids_user_list.html", {"user_users": user_users, "exam": exam})
+
+    def exam_cids_submitted_list(self, request, exam_id):
+        """HTMX partial returning the submitted candidates summary."""
+        exam = get_object_or_404(self.Exam, pk=exam_id)
+        if request.user not in exam.author.all() and not request.user.is_superuser:
+            raise PermissionDenied
+
+        user_exam_data = exam.cid_users.all().prefetch_related("cid_user", "user_user")
+
+        return render(request, "generic/partials/exam_cids_submitted_list.html", {"user_exam_data": user_exam_data, "exam": exam})
+
     # def exam_groups_edit(self, request, exam_id):
     #    exam = get_object_or_404(self.Exam, pk=exam_id)