Invalid Data passing the entry check

Questions
1

Describe the problem/error/question

I am getting data via a webhook and want to check the field values (if-node). It looks like I am not able to check a {{ null }} value. The record is passing my entry check nevertheless

Screen Shot 08-04-26 at 08.45 AM
Screen Shot 08-04-26 at 08.45 AM1870×868 86.3 KB

What is the error message (if any)?

Please share your workflow

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Share the output returned by the last node

Information on your n8n setup

  • n8n version: 2.23.2 Community Edition
  • Database (default: SQLite):
  • n8n EXECUTIONS_PROCESS setting (default: own, main):
  • Running n8n via (Docker, npm, n8n cloud, desktop app):
  • Operating system: Ubuntu
2

Hey @Nadir, while you wait for a response, here are some things that might help:

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3

Hi there,

Have you done the courses?

You check values by adding the actual values not field names.
So for example {{ $json.accountNumber }}
You can simply drag in the fields to set them.

Also they are inside the body so it would be $json.body.accountNumber

4

Oh my god … sometimes you don’t see the forest because of all the trees :laughing:

5

Thank you !

6

accountNumber in your payload is a JSON null, which isn’t always handled by the Is not empty operator the way you’d expect. Instead of comparing against {{ null }}, use an expression such as:



{{ $json.accountNumber !== null }}

or, if you also want to catch undefined:



{{ $json.accountNumber != null }}

If your goal is simply to verify that the field contains a real value, you can also use:



{{ !!$json.accountNumber }}

That will evaluate to false for null, undefined, and empty strings.

7

Thank you !