Aggregate

processing.aggregate Processing v0.1.0

Aggregates the input items — optionally grouped by a field — with collect, count, sum, avg, min, max, first, last, and concatenate operations.

Ports

Direction	Port	Label
Input	`input`	Items
Output	`output`	Groups

Properties

Property	Type	Default	Description
Group by `groupBy`	`string`	`—`	Dot-path of the field to group items by. Leave blank to aggregate everything into a single group.
Operations `operations`	`rows`	`[{"op":"count","field":"","as":"count"}]`	One output value per row: pick an operation, the field it reads (not needed for count; blank on concatenate = the whole item), and the output key (blank = op_field, "count", or "concatenated").
Separator `separator`	`string`	`", "`	Text placed between the joined values (concatenate rows), e.g. ", ", a space, or "". Shown when `Array.isArray(operations) && operations.some((r) => r?.op === "concatenate")`
Prefix `prefix`	`string`	`""`	Optional text placed before the joined result (concatenate rows). Shown when `Array.isArray(operations) && operations.some((r) => r?.op === "concatenate")`
Suffix `suffix`	`string`	`""`	Optional text placed after the joined result (concatenate rows). Shown when `Array.isArray(operations) && operations.some((r) => r?.op === "concatenate")`

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