Expression Node

Expression evaluates formulas or templates and writes results to payload.

Configuration Fields

Field	Required	Purpose
Expression	Yes	Formula/template to evaluate
Output Path	Yes	Payload path to store result

Setup Steps

1. Place Expression after payload normalization.
2. Define expression logic.
3. Set explicit output path.
4. Validate result type before downstream use.

Best Practices

• Keep expressions short and readable.
• Avoid complex business logic in a single expression.
• Store intermediate values under clear keys.

Common Issues

• Null/missing field errors in expression input.
• Type mismatches in downstream nodes.