n8n - 💡(How to fix) Fix Bug in .length function [3 comments, 3 participants]

When using @json.output.length in a if node, I'm being told that '1000 ' is not a integer. There seems to be a leading space causing an error.

• error: all

TL;DR

Remove the leading space from the @json.output.length value to fix the integer conversion error.

Guidance

• Verify that the issue is indeed caused by a leading space in the @json.output.length value by checking the output of @json.output.length in a debug node.
• Try using the trim() function to remove any leading or trailing whitespace from the @json.output.length value, e.g., {{ $json.output.length.trim() }}.
• If the issue persists, try using a regular expression to remove any non-numeric characters from the @json.output.length value.
• Consider reporting this issue to the n8n community or developers, as the workaround of multiplying by 1 may not be the most efficient solution.

Example

// Remove leading and trailing whitespace
{{ $json.output.length.trim() }}

// Remove non-numeric characters using a regular expression
{{ $json.output.length.replace(/[^0-9]/g, '') }}

Notes

The provided workaround of multiplying by 1 may work, but it does not address the root cause of the issue. The trim() function or regular expression approach may provide a more robust solution.

Recommendation

Apply the workaround using the trim() function or regular expression approach, as it is a more targeted solution to the issue.