[#1472] Filter does not work for blank additional field

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Migrated from Redmine #1472 | Author: G Muller
Status: New | Priority: High, I’m very impatient | Created: 2025-09-12

Hello everyone,

I’m trying to filter some reservations where a specific additional field isn’t filled out. I’m using this query string: “&filter[status]=canceled&filter[additional_fields][4a423cc175d88c2eec19798d53c1b0df]=”, but it’s not working.

The field ID is correct because if I filter on a single value, it works perfectly.

Can anyone give me some guidance?

Thanks!