How to add string to a list by using code expression

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Hi, i'm building app using supabase db and as i understood with supabase, flutterflow dont have an option "List update type" (as with the fireabase db) that includes option "Add to set" which is adding an item to a list. So i think i need to do a code expression to add an item to list.

What have you tried so far?

I was trying. But it just replace an item, not add

Did you check FlutterFlow's Documentation for this topic?

Yes