Hi all,
I've an app where users are able to create a barcode. I only want unique barcodes to be created and check before creation of the barcode if the same already exists.
Therefore I created the collection "coupon" with the field "barcodeValue". Now if somebody enters a code "1234567" in the field it should check on duplicates and show a snackbar.
What is a scalable solution for a duplicate check for a thousands of barcodes?
I tried this but couldn't get it work.
