Example Node

Basic Example Node
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Overview

This node, named "Example Node," is a basic transformation tool designed to add or overwrite a string property in each input item’s JSON data. It processes incoming data items and sets the value of a specified string field ("My String") on each item. This node is useful when you want to inject or modify a simple text value across multiple data entries within an n8n workflow.

Practical examples:

  • Adding a constant label or tag to all records before sending them to another system.
  • Overwriting or setting a descriptive field in data items for further processing or filtering.
  • Quickly testing workflows by injecting a placeholder string into data.

Properties

Name Meaning
My String The description text; a string value to set on each item's myString field. Placeholder shown as "Placeholder value".

Output

The node outputs the same number of items as it receives, with each item’s JSON data augmented by a new or updated property named myString. The value of this property corresponds to the input provided via the "My String" parameter.

Output structure example:

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

No binary data output is produced by this node.

Dependencies

  • No external services or API keys are required.
  • The 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.

To resolve errors:

  • Ensure the input data is valid JSON objects.
  • Verify that the "My String" property is correctly set and is a string.

Links and References

Discussion