n8n Zero to Hero · Level 1: The Automation Playground · Episode 05
Secret Codes
Giving your robot a secret spy codename — combining text and reading a value that updates itself.
What this episode is about
Your robot's ID card from Episode 4 is about to get a secret upgrade. We add one more field — codename — but instead of typing a value directly, we combine two pieces of text together: a fixed word like "Agent," and your robot's own name field, reached into dynamically with an expression. Change the name, and watch the codename update itself automatically, without you touching it. That's the difference between a value you type once and a value that's alive.
What you'll learn
- Combining (concatenating) two pieces of text into one value
- Turning on Expression mode with the fx toggle
- Reading another field's value dynamically using $json
- Why a dynamic value updates itself automatically when its source changes
- Building on your saved Robot ID Card from Episode 4 instead of starting over