[Full register] Get lessons and child groups in view and prefetch data there

aleksis/apps/alsijil/templates/alsijil/print/full_register.html

@@ -175,7 +175,7 @@
       </thead>
 
       <tbody>
-      {% for lesson in group.lessons.all %}
+      {% for lesson in lessons %}
         <tr>
           <td>{{ lesson.subject.name }}</td>
           <td>{{ lesson.teachers.all|join:', ' }}</td>
@@ -206,7 +206,7 @@
       </thead>
 
       <tbody>
-      {% for child_group in group.child_groups.all %}
+      {% for child_group in child_groups %}
         {% for lesson in child_group.lessons.all %}
           <tr>
             <td>{{ child_group.name }}</td>

aleksis/apps/alsijil/views.py

@@ -471,7 +471,18 @@ def full_register_group(request: HttpRequest, id_: int) -> HttpResponse:
     context["periods_by_day"] = periods_by_day
     context["lesson_periods"] = lesson_periods
     context["today"] = date.today()
-
+    context["lessons"] = (
+        group.lessons.all()
+        .select_related("validity", "subject")
+        .prefetch_related("teachers", "lesson_periods")
+    )
+    context["child_groups"] = group.child_groups.all().prefetch_related(
+        "lessons",
+        "lessons__validity",
+        "lessons__subject",
+        "lessons__teachers",
+        "lessons__lesson_periods",
+    )
     return render(request, "alsijil/print/full_register.html", context)