# Conditional Check After Barcode Scan?
**URL:** https://community.glideapps.com/t/conditional-check-after-barcode-scan/82431
**Category:** Ask for Help
**Tags:** scanner
**Created:** [June 12, 2025, 5:38pm UTC](https://community.glideapps.com/t/conditional-check-after-barcode-scan/82431 "2025-06-12T17:38:06Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@JohnnyBoy](https://community.glideapps.com/u/JohnnyBoy)
#### Post date: [June 12, 2025, 5:38pm UTC](https://community.glideapps.com/t/conditional-check-after-barcode-scan/82431/1 "2025-06-12T17:38:06Z")
Hello! I’m unable to figure out how to perform a conditional check upon a scan since the workflow editor will only allow conditionals at the action origin. The desired flow is: Person scans barcode, system looks up that scanned ID in a table and compares value: If X do this, if not, do this. Screenshot shows how the scanned action can only be placed after the conditional.
Any help you can provide is appreciated. Thanks!
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### Author:  [@ThinhDinh](https://community.glideapps.com/u/ThinhDinh)
#### Post date: [June 12, 2025, 11:53pm UTC](https://community.glideapps.com/t/conditional-check-after-barcode-scan/82431/2 "2025-06-12T23:53:30Z")
I think you can do this:
- Add a webhook workflow and build the logic above there, plan ahead by having a query step to query the scanned barcode value that you will send over, and reference that in your conditions.
- Go back to the scan barcode chain of actions, add a step to trigger the webhook workflow, and send over the scanned barcode value through the body/query params.
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### Author:  [@JohnnyBoy](https://community.glideapps.com/u/JohnnyBoy)
#### Post date: [June 16, 2025, 10:06pm UTC](https://community.glideapps.com/t/conditional-check-after-barcode-scan/82431/3 "2025-06-16T22:06:22Z")
Thank you. Your suggestion was a little above my head but I was able to figure out a way forward by first calculating the condition in a table, creating a relation to that, and then referencing that relation in the conditional at the beginning of the workflow. This video was helpful for those who need it: [https://www.youtube.com/watch?v=A0pe7gGZVrw&ab\_channel=GRUMO](https://www.youtube.com/watch?v=A0pe7gGZVrw&ab_channel=GRUMO)
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### Author:  [@ThinhDinh](https://community.glideapps.com/u/ThinhDinh)
#### Post date: [June 16, 2025, 11:18pm UTC](https://community.glideapps.com/t/conditional-check-after-barcode-scan/82431/4 "2025-06-16T23:18:39Z")
Is the “scan barcode” action a part of that workflow, or can you configure a scan barcode component separately?
Honestly I haven’t built many apps that use barcodes, my assumption based on your comment is we can have a scan barcode component which triggers a workflow.
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### Author:  [@ThinhDinh](https://community.glideapps.com/u/ThinhDinh)
#### Post date: [June 16, 2025, 11:21pm UTC](https://community.glideapps.com/t/conditional-check-after-barcode-scan/82431/5 "2025-06-16T23:21:20Z")
Just searched for it, yeah we do have both (a component and an action).
> **[Scanner | Glide Docs](https://www.glideapps.com/docs/barcode-scanner)**
>
> Scan barcodes and QR codes with your Glide app.
> **[Scan Barcode or QR Code | Glide Docs](https://www.glideapps.com/docs/scan-barcode)**
>
> Scan barcodes or QR codes and log the values to your table.
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### Author:  [@system](https://community.glideapps.com/u/system)
#### Post date: [June 23, 2025, 11:21pm UTC](https://community.glideapps.com/t/conditional-check-after-barcode-scan/82431/6 "2025-06-23T23:21:28Z")
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