Returning a array from Code Node - A 'json' property isn't an object

Describe the problem/error/question

A code node with just this line -
return ['1','2','3','4'];
gives me a error “A ‘json’ property isn’t an object”

What is the error message (if any)?

“A ‘json’ property isn’t an object”

Returning an array is useful to use a batch node following the code node, or let the default n8n behavior where it runs the next node once for each item automatically (e.g save them to a database).

This used to be working in the 0.9.* versions before I recently upgraded to 1.1 version.

I hope it is still possible to return an array from a code node, and I am missing something small/obvious here.

Any help is appreciated, Thanks !

Information on your n8n setup

  • n8n version: 1.1.1
  • Running n8n via Docker compose

Hey @atomtr,

To be honest I would expect that to fail even in 0.2.x as we expect the data to be JSON, If you were to do something like…

return [{id:'1'},{id:'2'},{id:'3'},{id:'4'}];

That would return an array and give you 4 items so the next node would run 4 times.

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Thanks for that @Jon - I guess I must have been on an even older version and now have updated my workflow to return proper json objects. Cheers

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