[UPD] action_send_end_training_data: add filter for present students

models/training.py

@@ -88,7 +88,14 @@ class Training(models.Model):
         self.ensure_one()
         self.action_done()
         end_template_id = self.env.ref("training_survey.mail_template_training_end")
-        student_ids = self.student_ids.filtered(lambda s: s.state == "confirmed")
+        student_ids = self.student_ids.filtered(
+            lambda s: s.state == "confirmed"
+            and any(
+                s.student_slot_ids.mapped(
+                    lambda slot: True if slot.state == "present" else False
+                )
+            )
+        )
         for student in student_ids:
             aect_answer = student._create_answer(self.aect_survey_id)
             satisfaction_answer = student._create_answer(self.satisfaction_survey_id)