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verify_uploads_are_distinct

headless_lms_server::domain::exercise_services::answer_uploads

Function verify_uploads_are_distinct 

Source 
pub fn verify_uploads_are_distinct(
    requested: &[Uuid],
) -> Result<(), ControllerError>
Expand description

Rejects a submit naming the same upload twice.

Deduplicating instead would record the file twice under one submission and list it twice in a download, and would hide a client defect while doing so. There is no answer a duplicate could sensibly mean, so it is reported rather than repaired.