# Lookup a row using a qr code - then change a value

**URL:** <https://community.miniextensions.com/t/lookup-a-row-using-a-qr-code-then-change-a-value/272>\
**Category:** Need help\
**Created:** [May 15, 2023, 3:45pm UTC](https://community.miniextensions.com/t/lookup-a-row-using-a-qr-code-then-change-a-value/272 "2023-05-15T15:45:43Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Tapefabrik](https://avatars.discourse-cdn.com/v4/letter/t/278dde/32.png) [@Tapefabrik](https://community.miniextensions.com/u/Tapefabrik)\
**Post date:** [May 15, 2023, 3:45pm UTC](https://community.miniextensions.com/t/lookup-a-row-using-a-qr-code-then-change-a-value/272/1 "2023-05-15T15:45:43Z")

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Dear Community & Team,

i am trying to use miniExtension to check on a guestlist. Basically i have 4 entries, having an attribute “id” and unique values for the id like: 1.) abc 2.) def 3.) ghi 4.) jkl

Every entry has another checkbox value “checked” being not checked at the start.

I want to scan a qr code having a value of e.g. “abc”, matching to the id field - then i want to see the value of “checked”. If it is not checked, it should be checked.

If i scan the code again, i want to see that the value of “checked” is set. Ideally no possibility to check it again.

I tried this by setting up a form, having two fields. One id and one “checked”. Id can be selected using the qr code function.

My issue - the form does not behave like a look-up version at all. Scanning a qr code sets the value - but does not retrieve the value of “checked” from the database… is there any tutorial on how to set something like this up?

Thanks!

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**Author:** ![Abdul](https://avatars.discourse-cdn.com/v4/letter/a/dfb087/32.png) [@Abdul](https://community.miniextensions.com/u/Abdul)\
**Post date:** [May 16, 2023, 1:59am UTC](https://community.miniextensions.com/t/lookup-a-row-using-a-qr-code-then-change-a-value/272/2 "2023-05-16T01:59:48Z")

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Hi @Tapefabrik. Welcome to miniExtensions forum.

You can configure this feature following the steps outlined in the article: [How to look up barcodes & QR codes on the login page? | miniExtensions for Airtable](https://docs.miniextensions.com/en/articles/5339254). Note that barcode scanning can be enabled for any login field, so it doesn’t necessarily have to be a barcode field specifically.