FlowmageDocs
Expressions

Write an expression

Fill a node's field from the run's data: pick a value in the Input pane, change it with a function, and see what the field holds before the flow runs.

Steps

Pick a value

Double-click the node and click in the field. In the Input pane, under From earlier steps, open a step and click the field you need. It goes in at the cursor as a chip, such as ID · Start; the line under the field shows its value from the last test.

A node's settings with the Input pane open at Start. The field What you are asking holds the chips ID and Total from Start, and the line under it reads Order A-1042 is worth € 1850.

Change it with a function

Under Build, click Functions, pick a group such as Text, and click a function. It goes in at the cursor, filled from your data where it fits, with its first value selected to replace. Dates, Secrets and Files are under Build too. Or type {{ and pick from the list.

The Input pane at Build, then Functions, listing Text, Numbers, Lists, Dates, Encoding and Conversion & fallbacks.
How it works

Each {{ }} is worked out when the node runs, from that run's data; the text around it stays as typed. A field that is one expression and nothing else keeps the value's kind, so a list stays a list. fx at the end of the field shows the expression as stored.

If it did not work

  • The line under the field is red. Find its message on When an expression fails.
  • A value reads hasn’t run yet. No sample data yet: click Test previous nodes at the foot of the Input pane.
  • The field reads Resolves to nothing. The step's output has no such field. Click the field it suggests, or pick the value again.

Next

Dates, text and lists recipes

Expressions to copy.

What an expression can read

The names it starts with, and paths.