append

append is a DML operation that adds one value to the end of a sequence.

Use it when the target sequence already exists and order matters.

YOp

- append:
    path: config/allowed_hosts
    value: "*.example.com"

Parameters

Parameter	Type	Required	Description
path	string	yes	Path to the target sequence.
value	any	yes	YAML value to append.

Behavior

• Requires the target path to exist.
• Requires the target to be a sequence.
• Appends the value after existing items.
• Does not deduplicate. Use unique after append when uniqueness is required.

Errors

Error	Meaning
PATH_NOT_FOUND	Target path does not exist.
NOT_A_SEQUENCE	Target is not a sequence.

Example

yops:
  - append:
      path: tags
      value: reviewed

Input:

tags:
  - draft

Output:

tags:
  - draft
  - reviewed