Fix export deletion on KC storage

kobo/apps/openrosa/apps/viewer/signals.py

@@ -1,5 +1,4 @@
 from django.conf import settings
-from django.core.files.storage import default_storage
 from django.db.models.signals import post_delete, post_save, pre_delete
 from django.dispatch import receiver
 from guardian.shortcuts import assign_perm, get_perms_for_model
@@ -8,6 +7,9 @@
 from kobo.apps.openrosa.apps.viewer.models.data_dictionary import DataDictionary
 from kobo.apps.openrosa.apps.viewer.models.export import Export
 from kobo.apps.openrosa.apps.viewer.models.parsed_instance import ParsedInstance
+from kpi.deployment_backends.kc_access.storage import (
+    default_kobocat_storage as default_storage,
+)
 
 
 @receiver(post_delete, sender=Export)

kobo/apps/openrosa/apps/viewer/tests/test_exports.py

@@ -89,8 +89,9 @@ def test_create_export(self):
     def test_delete_file_on_export_delete(self):
         self._publish_transportation_form()
         self._submit_transport_instance()
-        export = generate_export(Export.XLS_EXPORT, 'xls', self.user.username,
-                                 self.xform.id_string)
+        export = generate_export(
+            Export.XLS_EXPORT, 'xls', self.user.username, self.xform.id_string
+        )
         self.assertTrue(default_storage.exists(export.filepath))
         # delete export object
         export.delete()