Optional node execution

Questions
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1

Describe the problem/error/question

From version 1.0, what is the correct way to access an optional node, which may or may not be executed?

What is the error message (if any)?

[ERROR: no data, execute “Set1” node first]

Please share your workflow [Updated]

Information on your n8n setup

  • n8n version: 1.0.1
  • Database (default: SQLite): PostgreSQL
  • n8n EXECUTIONS_PROCESS setting (default: own, main): main
  • Running n8n via (Docker, npm, n8n cloud, desktop app): Docker
  • Operating system: Linux
2

First, you have to make sure that the node is connected. Because with v1, nodes will only execute if they receive data.
Regarding accessing the data. You would then probably write:

{{ $json.value2 || $json.value1 }}
1 Like
3

Thanks for the quick response. The example I created was not very clear, correct me if I’m wrong, to access via $json it is necessary that both nodes are paired, however the problem I am having after updating to v1 and accessing data from more than a step back that haven’t been executed, so I need to access them via $node['NotPairedNode'] / $('NotPairedNode').

4

Ah yes, in that case, it is really more complicated. Right now do not think there is a way of doing that anymore. We will think about it and see if there is a good way to make that possible.

5

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