elasticsearch
Loading

Append processor

Appends one or more values to an existing array if the field already exists and it is an array. Converts a scalar to an array and appends one or more values to it if the field exists and it is a scalar. Creates an array containing the provided values if the field doesn’t exist. Accepts a single value or an array of values.

Name Required Default Description
field yes - The field to be appended to. Supports template snippets.
value yes - The value to be appended. Supports template snippets.
allow_duplicates no true If false, the processor does not appendvalues already present in the field.
media_type no application/json The media type for encoding value. Applies only when value is atemplate snippet. Must be one of application/json, text/plain, orapplication/x-www-form-urlencoded.
description no - Description of the processor. Useful for describing the purpose of the processor or its configuration.
if no - Conditionally execute the processor. See Conditionally run a processor.
ignore_failure no false Ignore failures for the processor. See Handling pipeline failures.
on_failure no - Handle failures for the processor. See Handling pipeline failures.
tag no - Identifier for the processor. Useful for debugging and metrics. 
{
  "append": {
    "field": "tags",
    "value": ["production", "{{{app}}}", "{{{owner}}}"]
  }
}