Update not delete `CourseSessionAttendanceCourse`

server/vbv_lernwelt/importer/services.py

@@ -150,25 +150,20 @@ def create_or_update_course_session(
     for circle in circle_keys:
         circle_name = CIRCLE_NAMES[circle][language]
 
-        attendance_course_lp_qs = LearningContentAttendanceCourse.objects.filter(
+        attendance_course_lc = LearningContentAttendanceCourse.objects.filter(
             slug=f"{course.slug}-lp-circle-{circle_name.lower()}-lc-präsenzkurs-{circle_name.lower()}"
-        )
+        ).first()
 
-        if attendance_course_lp_qs and attendance_course_lp_qs.exists():
+        if attendance_course_lc:
-            # reset existing data
+            # update existing data
-            # TODO: Is this save? stuff shouldn't get lost
+            csa, _created = CourseSessionAttendanceCourse.objects.get_or_create(
-            CourseSessionAttendanceCourse.objects.filter(
+                course_session=cs, learning_content=attendance_course_lc
-                course_session=cs, learning_content=attendance_course_lp_qs.first()
+            )
-            ).delete()
 
             location = f"{data[f'{circle} Raum']}, {data[f'{circle} Standort']}, {data[f'{circle} Adresse']}"
+            csa.location = location
 
-            csa = CourseSessionAttendanceCourse.objects.create(
+            csa.trainer = ""
-                course_session=cs,
-                learning_content=attendance_course_lp_qs.first(),
-                location=location,
-                trainer="",
-            )
             csa.due_date.start = try_parse_datetime(data[f"{circle} Start"])[1]
             csa.due_date.end = try_parse_datetime(data[f"{circle} Ende"])[1]
             csa.due_date.save()
@@ -269,7 +264,6 @@ def create_or_update_trainer(course: Course, data: Dict[str, Any], language="de"
     # circle expert handling
     circle_data = parse_circle_group_string(data["Circles"])
     for circle_key in circle_data:
-
         circle_name = CIRCLE_NAMES[circle_key][language]
 
         # print(circle_name, groups)

server/vbv_lernwelt/importer/tests/test_import_course_sessions.py

@@ -123,6 +123,57 @@ class CreateOrUpdateCourseSessionTestCase(TestCase):
             attendance_course.due_date.end.isoformat(), "2023-06-06T13:00:00+00:00"
         )
 
+    def test_import_course_session_twice(self):
+        """
+        importing the course session twice should create the
+        `CourseSessionAttendanceCourse` only once
+        """
+        row = [
+            ("ID", "DE 2023 A"),
+            ("Generation", 2023),
+            ("Region", "Deutschschweiz"),
+            ("Sprache", "de"),
+            ("Klasse", "A"),
+            ("Fahrzeug Start", "06.06.2023, 13:30"),
+            ("Fahrzeug Ende", "06.06.2023, 15:00"),
+            (
+                "Fahrzeug Raum",
+                "https://teams.microsoft.com/l/meetup-join/19%3ameeting_N2I5YzViZTQtYTM2Ny00OTYwLTgzNzAtYWI4OTQzODcxNTlj%40thread.v2/0?context=%7b%22Tid%22%3a%22fedd03c8-a756-4803-8f27-0db8f7c488f2%22%2c%22Oid%22%3a%22f92e6382-3884-4e71-a2fd-b305a75d9812%22%7d",
+            ),
+            ("Fahrzeug Standort", None),
+            ("Fahrzeug Adresse", None),
+        ]
+
+        data = dict(row)
+
+        cs1 = create_or_update_course_session(
+            self.course, data, language="de", circle_keys=["Fahrzeug"]
+        )
+        attendance_course1 = CourseSessionAttendanceCourse.objects.first()
+        self.assertEqual(
+            attendance_course1.due_date.start.isoformat(), "2023-06-06T11:30:00+00:00"
+        )
+        self.assertEqual(
+            attendance_course1.due_date.end.isoformat(), "2023-06-06T13:00:00+00:00"
+        )
+
+        # import a second time
+        data["Fahrzeug Start"] = "06.06.2023, 13:15"
+        data["Fahrzeug Ende"] = "06.06.2023, 14:45"
+        cs2 = create_or_update_course_session(
+            self.course, data, language="de", circle_keys=["Fahrzeug"]
+        )
+
+        self.assertEqual(cs1.id, cs2.id)
+        attendance_course2 = CourseSessionAttendanceCourse.objects.first()
+        self.assertEqual(
+            attendance_course2.due_date.start.isoformat(), "2023-06-06T11:15:00+00:00"
+        )
+        self.assertEqual(
+            attendance_course2.due_date.end.isoformat(), "2023-06-06T12:45:00+00:00"
+        )
+        self.assertEqual(attendance_course1.id, attendance_course2.id)
+
     def test_raise_exception_if_header_is_missing(self):
         data = [
             ("ID", "DE 2023"),