Execute Set Node Based on Function Output

This n8n workflow demonstrates how to dynamically control the execution of a Set node based on the output of a Function node. It provides a clear example of using conditional logic (If node) to route data and perform actions only when specific criteria are met by custom JavaScript code.

What it does

This workflow performs the following steps:

1. Starts the workflow: The Start node initiates the workflow execution.
2. Executes Custom JavaScript: A Function node runs custom JavaScript code. This code is responsible for generating an output that will be used for conditional routing.
3. Evaluates Function Output: An If node receives the output from the Function node and evaluates a condition.
4. Conditionally Executes Set Node:
   • If the condition in the If node evaluates to true, the data is passed to the Edit Fields (Set) node.
   • If the condition evaluates to false, the Edit Fields (Set) node is skipped.
5. Edits/Sets Fields (Conditional): The Edit Fields (Set) node, if executed, can be configured to add, remove, or modify fields in the incoming data.

Prerequisites/Requirements

• An active n8n instance.

Setup/Usage

1. Import the workflow:
   • Copy the provided JSON code.
   • In your n8n instance, click on "Workflows" in the left sidebar.
   • Click "New" or the "+" icon, then select "Import from JSON".
   • Paste the JSON code and click "Import".
2. Configure the Function node:
   • Open the Function node.
   • Modify the JavaScript code within the node to produce the desired output that your If node will evaluate. For example, you might return { "shouldProceed": true } or { "value": 10 }.
3. Configure the If node:
   • Open the If node.
   • Set up the condition(s) based on the expected output from your Function node. For instance, if your function returns { "shouldProceed": true }, you would set a condition like shouldProceed is true.
4. Configure the Edit Fields (Set) node:
   • Open the Edit Fields (Set) node.
   • Define the fields you want to add, remove, or update when this branch of the workflow is executed.
5. Activate the workflow:
   • Toggle the "Active" switch in the top right corner of the workflow editor to enable the workflow.
6. Execute the workflow:
   • You can manually test the workflow by clicking "Execute Workflow" in the editor, or it will run based on its trigger (which is a Start node in this case, meaning it can be triggered manually or by a schedule if configured).