Custom Filter: Doesn't Contain

[jtich21]

I am needing to filter based on two different dimensions so using a custom filter. I found where I can use a Contains String, but I need it to work as a Doesn’t Contain function and return all results except for what I am using as my searchstring.

[Dawid]

I believe you’re looking for NOT() function:

NOT(contains(${afield}, "search_value"))