only modify fieldmap_id when not None

nipreps · Oct 2, 2024 · a288dea · a288dea
1 parent bd290fc
commit a288dea
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/fmriprep/utils/bids.py b/fmriprep/utils/bids.py
@@ -78,7 +78,7 @@ def collect_derivatives(
             **q,
             **{k: v for k, v in entities.items() if k not in ['suffix', 'extension']},
         }
-        if xfm == 'boldref2fmap':
+        if xfm == 'boldref2fmap' and fieldmap_id:
             # fieldmaps have ids like auto_00000
             query['to'] = fieldmap_id.replace('_', '')
         item = layout.get(return_type='filename', **query)