refactor: use taxonomy.export_id in header

Author: rpenido

openedx/core/djangoapps/content_tagging/rest_api/v1/tests/test_views.py

@@ -1818,7 +1818,7 @@ def test_export_course(self, user_attr) -> None:
         assert response.headers['Content-Type'] == 'text/csv'
 
         expected_csv = (
-            '"Name","Type","ID","Taxonomy 1","Taxonomy 2"\r\n'
+            '"Name","Type","ID","1-taxonomy-1","2-taxonomy-2"\r\n'
             '"Test Course","course","course-v1:orgA+test_course+test_run","Tag 1.1",""\r\n'
             '"  test sequential","sequential","block-v1:orgA+test_course+test_run+type@sequential+block@test_'
             'sequential","Tag 1.1, Tag 1.2","Tag 2.1"\r\n'

openedx/core/djangoapps/content_tagging/rest_api/v1/views.py

@@ -174,8 +174,7 @@ def _generate_csv_rows() -> Iterator[str]:
 
             # Prepare the header for the taxonomies
             for taxonomy_id, taxonomy in taxonomies.items():
-                # ToDo: change to taxonomy.external_id after the external_id is implemented
-                header[f"taxonomy_{taxonomy_id}"] = taxonomy.name
+                header[f"taxonomy_{taxonomy_id}"] = taxonomy.export_id
 
             csv_writer = csv.DictWriter(pseudo_buffer, fieldnames=header.keys(), quoting=csv.QUOTE_NONNUMERIC)
             yield csv_writer.writerow(header)