Module: 2/5
Lesson: 5/7
Exercises:
Module 2 | Lesson 4

Lesson 4: Data Mapping

In n8n: The Expression Editor

In n8n, you click into a field and you'll see an expression editor. You write in {{ }} syntax to reference outputs from previous nodes.

The syntax is more verbose than Make, but it works the same way:

{{ $node["HTTP Request"].json.current.temperature_2m }}

This means: "From the node called 'HTTP Request', get the JSON output, go to the 'current' property, and get 'temperature_2m'."

n8n has an autocomplete feature. As you type, it suggests available fields. Use that to explore what's available from previous nodes.

Both platforms are doing the same thing: letting you reference previous outputs and insert them into current fields.

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