omeroweb.webgateway.obj_id_bitmask: handle empty query results #580
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See ome/openmicroscopy#6411
The current implementation behaves incorrectly when
getWhereList
returns an empty list (no matches). This is due to the fact that the contract oftable.slice()
is to return all rows ifrow_numbers
is empty or None.Instead, this fix detects the scenario where
row_numbers
is empty and return the corresponding bitmask as an HTTP response