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.

Table 3. Append Options

{
  "append": {
    "field": "tags",
    "value": ["production", "{{app}}", "{{owner}}"]
  }
}