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 assigns it to a field called myString on every incoming data item. This node is useful for simple data enrichment or tagging scenarios where you want to append a consistent string value to all items passing through the workflow.

Practical examples:

• Adding a fixed label or category name to each data item.
• Injecting a constant identifier or note into records before further processing.
• Testing workflows by appending a known string to verify data flow.

Properties

Output

The output consists of the same number of items as the input. Each item's JSON data will have a new or updated property named myString set to the value provided in the node's input property.

No binary data is produced by this node.

Example output JSON structure per item:

{
  "myString": "value set by user",
  // ... other original properties remain unchanged
}

Dependencies

• No external services or API keys are required.
• This node operates purely on the input data within the workflow.

Troubleshooting

• Common issues:

  • If the input data is empty or not structured as expected, the node will simply pass through the data without modification.
  • Errors during execution typically relate to invalid input types or unexpected data structures.

• Error messages:

  • If an error occurs on a specific item, and the node is configured to continue on failure, the error details will be attached to that item’s output under an error property.
  • Otherwise, the node throws an error indicating the item index where the failure happened.

Links and References

• n8n Documentation - Creating Nodes
• n8n Workflow Basics