Call another node from code node

Describe the problem/error/question

Hey guys at n8n,

I’m trying to detect if a field exists in JSON received from a webhook inside a “Code node” and based on the result call another node, is that possible? or is there another way to do that with another node? I looked at the documentation and the community but I didn’t find a way to achieve this.

What is the error message (if any)?

Please share your workflow

This is the logic I have with a script:

const jsonData = {
  // the webhook received JSON data here

// Check if "uuid" exists in "meta_data"
const metaData = jsonData.meta_data || [];
let uuidExists = false;

for (const item of metaData) {
  if (item.key === "uuid") {
    uuidExists = true;

if (uuidExists) {
  call or continue with "send email node" for example
} else {
 stop and do nothing node

Share the output returned by the last node

Information on your n8n setup

  • n8n version: 1.1.1
  • Database (default: SQLite): Postgre SQL
  • n8n EXECUTIONS_PROCESS setting (default: own, main): own
  • Running n8n via (Docker, npm, n8n cloud, desktop app): Docker
  • Operating system:

Hi @rodmontgt, this isn’t directly possible but you could consider returning your uuidExists field through your Code node, then connect a subsequent If node. If uuidExists is true, run your other node, otherwise don’t.


Thanks @MutedJam, following your advice, I was able to accomplish it with the following code:

// Check if UUID field exists
const jsonData = $('Order').first().json;  // the webhook received JSON data here

// Check if "uuid" exists in "meta_data"
const metaData = jsonData.order.body.meta_data || [];
let uuidExists = 0; // Initialize with false value
let uuidValue = null; // Initialize the variable to store UUID value

for (const item of metaData) {
  if (item.key === "uuid") {
    uuidExists = 1; // Assign 1 if positive, 0 if false
    uuidValue = item.value; // Store the UUID value

//Return UUID value
return [{
  json: { 
    "uuidValue": uuidValue,
    "uuidExists": uuidExists

Then with a IF node, I can compare the uuidExists value, I wanted to do it with boolean values but I have no luck with that, so with numbers is OK

1 Like

This topic was automatically closed 7 days after the last reply. New replies are no longer allowed.