Allow filtering for amended and amending LessonEvents in get_objects

aleksis/apps/chronos/managers.py

@@ -902,3 +902,9 @@ class LessonEventQuerySet(PolymorphicQuerySet):
         return self.filter(
             Q(teachers=person) | Q(groups__members=person) | Q(pk__in=amended)
         ).distinct()
+
+    def not_amended(self):
+        return self.filter(amended_by__isnull=True)
+
+    def not_amending(self):
+        return self.filter(amends__isnull=True)

aleksis/apps/chronos/models.py

@@ -1538,6 +1538,14 @@ class LessonEvent(CalendarEvent):
         if params:
             obj_id = int(params.get("id", 0))
             type_ = params.get("type", None)
+            not_amended = params.get("not_amended", False)
+            not_amending = params.get("not_amending", False)
+
+            if not_amended:
+                objs = objs.not_amended()
+
+            if not_amending:
+                objs = objs.not_amending()
 
             if type_ and obj_id:
                 if type_ == "TEACHER":