Example NodeInstall

Overview

This node, named "Example Node," is a basic transformation node designed to add or overwrite a string property in each input item’s JSON data. It takes an input string from the user and sets this string as the value of the myString field on every incoming data item.

Common scenarios for this node include:

• Adding a static label or tag to all items passing through a workflow.
• Overwriting or setting a specific string property uniformly across multiple data items.
• Testing or demonstrating how to manipulate item data within n8n workflows.

For example, if you want to mark all records with a status like "Processed" or add a note "Checked by QA", this node can be used to set that string on each item.

Properties

Output

The node outputs the same number of items as it receives, but each item’s JSON data will have a new or updated property called myString containing the string provided via the input property.

Output structure example for one item:

{
  "json": {
    "myString": "User provided string"
    // ... other original properties remain unchanged
  }
}

No binary data output is produced by this node.

Dependencies

• No external services or API keys are required.
• The node relies solely on internal n8n workflow data manipulation capabilities.

Troubleshooting

• Empty or missing myString value: If the input string is left empty, the node will set the myString property to an empty string on all items, which might not be intended.
• Errors during execution: If an error occurs while processing an item, the node either stops execution or continues based on the "Continue On Fail" setting. Errors include invalid parameter retrieval or unexpected data structures.
• Incorrect input data format: The node expects input items to have JSON data; if the input is malformed or missing, errors may occur.

Links and References

• n8n Documentation - Creating Custom Nodes
• n8n Workflow Data Structure