Hey so I feel really dumb but how would I make a malli schema which validates that I have a non-empty string 😅 I’m thinking something like [:and string? [:not= blank?]] but there’s no blank? predicate support…

@suomi.esko You can use any predicate with :fn, either: [:fn str/blank?] (local, fast) or [:fn 'str/blank?] (portable)

@ikitommi Seems to work for the positive case, but I really do want to test the negation of that and I can’t seem to get it to work, or at least :not= isn’t what I should use. I think there isn’t a complementing predicate yet? 🙂

[:and string? some?] or [:fn {:error/message "should be non-empty string"} '(complement str/blank?)]?

could be :not ....

latter works though

former indeed does not, some? is effectively “not nil” check