Fix deletion bug in retrieval_service to check for materials before d…

…eleting

ai_ta_backend/service/retrieval_service.py

@@ -317,23 +317,22 @@ def delete_from_nomic_and_supabase(self, course_name: str, identifier_key: str,
     try:
       print(f"Deleting from Nomic and Supabase for {course_name} using {identifier_key}: {identifier_value}")
       response = self.sqlDb.getMaterialsForCourseAndKeyAndValue(course_name, identifier_key, identifier_value)
-      print(f"Trying to delete materials: {response}")
+      if not response.data:
+        raise Exception(f"No materials found for {course_name} using {identifier_key}: {identifier_value}")
       data = response.data[0]  # single record fetched
       nomic_ids_to_delete = [str(data['id']) + "_" + str(i) for i in range(1, len(data['contexts']) + 1)]
 
       # delete from Nomic
       # check if project exists
       response = self.sqlDb.getProjectsMapForCourse(course_name)
-      if response.data:
-        project_id = response.data[0]['doc_map_id']
-      else:
-        return "No document map found for this course"
+      if not response.data:
+        raise Exception(f"No document map found for this course: {course_name}")
+      project_id = response.data[0]['doc_map_id']
       self.nomicService.delete_from_document_map(project_id, nomic_ids_to_delete)
 
       # delete from Supabase
       print(f"Deleting from Supabase for {course_name} using {identifier_key}: {identifier_value}")
       response = self.sqlDb.deleteMaterialsForCourseAndKeyAndValue(course_name, identifier_key, identifier_value)
-      print(f"Deleted from sql: {response}")
     except Exception as e:
       print(f"Error in deleting file from Nomic or Supabase using {identifier_key}: {identifier_value}", e)
       self.sentry.capture_exception(e)