Concat processor

The Concat processor concatenates a mix of field values and literal strings into a single field.

To concatenate values:

Select Create → Create processor.
Select Concat from the Processor menu.
Set the items to concatenate. Each item is either a field reference or a literal string value.
Set the Target field where the concatenated result is stored.

YAML reference

In YAML mode, configure the concat processor using the following parameters. For the complete Streamlang syntax, refer to the Streamlang reference.

Parameter	Type	Required	Description
`from`	array	Yes	Items to concatenate. Each item is either `{ type: "field", value: "<field_name>" }` or `{ type: "literal", value: "<text>" }`.
`to`	string	Yes	Target field.
`ignore_missing`	boolean	No	When `true`, skip this processor if any referenced field is missing.

		- action: concat
  from:
    - type: literal
      value: "User: "
    - type: field
      value: attributes.username
    - type: literal
      value: " (ID: "
    - type: field
      value: attributes.user_id
    - type: literal
      value: ")"
  to: attributes.user_summary
		
	