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Adds to a list assign — the missing piece between Flow Assign (set a single value) and a full Flow Transform.

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Configuration

  • Target assign — the list to mutate. If currently nil, it is initialised to []. Errors if the assign holds a non-list value.
  • Value source — where the value comes from. Same vocabulary as Flow Compose / Flow Assign:
    • Assign — copy the raw value of another assign.
    • Extract — traverse into a map/struct at a path.
    • Dated property — read a dated property through its facade.
    • Literal — a fixed JSON-serializable value.
  • Mode — Append (default) adds the resolved value as a single element; Concat spreads a resolved list onto the target (it errors if the value source is not a list).
  • Position — End (default) adds at the tail, Start at the head.

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Tips

  • Use Concat to join two list assigns instead of folding element by element through a Flow Each.
  • Pair Append with a Flow Each upstream to fold a derived value over a collection without writing a Flow Transform.

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Ports