fix: return empty list when no courses are found for request

cms/djangoapps/contentstore/rest_api/v2/views/tests/test_home.py

@@ -247,3 +247,25 @@ def test_api_v2_is_disabled(self, mock_modulestore, mock_course_overview):
         self.assertEqual(response.status_code, status.HTTP_200_OK)
         mock_modulestore().get_course_summaries.assert_called_once()
         mock_course_overview.get_all_courses.assert_not_called()
+
+    @ddt.data(
+        ("active_only", "true"),
+        ("archived_only", "true"),
+        ("search", "sample"),
+        ("order", "org"),
+        ("page", 1),
+    )
+    @ddt.unpack
+    def test_if_empty_list_of_courses(self, query_param, value):
+        """Get list of courses when no courses are available.
+
+        Expected result:
+        - An empty list of courses available to the logged in user.
+        """
+        self.active_course.delete()
+        self.archived_course.delete()
+
+        response = self.client.get(self.api_v2_url, {query_param: value})
+
+        self.assertEqual(len(response.data['results']['courses']), 0)
+        self.assertEqual(response.status_code, status.HTTP_200_OK)

cms/djangoapps/contentstore/views/course.py

@@ -576,6 +576,9 @@ def filter_ccx(course_access):
     if course_keys:
         courses_list = CourseOverview.get_all_courses(filter_={'id__in': course_keys})
 
+    if not courses_list:
+        return [], []
+
     search_query, order, active_only, archived_only = get_query_params_if_present(request)
     courses_list = get_filtered_and_ordered_courses(
         courses_list,