Don't try to find max_diff from empty datasets

European-XFEL · Jan 30, 2024 · aafc20c · aafc20c
1 parent 2304460
commit aafc20c
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/damnit/migrations.py b/damnit/migrations.py
@@ -202,7 +202,7 @@ def migrate_v0_to_v1(db, db_dir, dry_run):
 
                 if 'max_diff' in ds.attrs:
                     max_diffs[(proposal, run_no, name)] = ds.attrs['max_diff'].item()
-                elif ds.ndim == 1 and np.issubdtype(ds.dtype, np.number):
+                elif ds.ndim == 1 and ds.size > 0 and np.issubdtype(ds.dtype, np.number):
                     data = ds[()]
                     max_diff = abs(np.nanmax(data) - np.nanmin(data)).item()
                     max_diffs[(proposal, run_no, name)] = max_diff