User other value if no data exist from previous node

[Sebastian1]

Hey there,

I did ask this question already Ifempty in expression but the solution seems not to work in this case or maybe it does only work if the first value is available within that firstvalue || secondvalue

At the moment I get this message (No output data returnedn8n stops executing the workflow when a node has no output data. You can change this default behaviour via Settings > “Always Output Data”.) in the set node where I do want either one value or the other depending on the IF node true or false

This is my workflow

Any advice is appreciated

[n8n]

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[Sebastian1]

I did solve it with that code node

but wonder if there is not an easier solution or maybe something I can use in the expression of the node where the customer_id is needed?

[Ludwig]

Hi @Sebastian1! Thank you for reaching out and being a part of the community!

Yes, you can solve it in the expression field with a ternary like @liam mentioned in your previous post.

Ifempty in expression

That definitely works but you can simplify it to: {{ $json.set2 ? $json.set2 : $json.code }} or simply it even further with {{ $json.set2 || $json.code }}. If the code I quoted worked for you then so will both of these if you just copy and paste them. Read more about it by looking up truthy and falsy values, ternary operation, and logical or operator (||) The $json.set2 ? will automatically return false if it is undefined or “”, so you only need to put the value itself in this case

Here’s an example workflow: