5. Error Handling

5. Error Handling

If a normative requirement is violated by a JSON Patch document, or if an operation is not successful, evaluation of the JSON Patch document SHOULD terminate and application of the entire patch document SHALL NOT be deemed successful.

See [RFC5789], Section 2.2 for considerations regarding handling errors when JSON Patch is used with the HTTP PATCH method, including suggested status codes to use to indicate various conditions.

Note that the HTTP PATCH method is atomic, as per [RFC5789]. Therefore, the following patch would result in no changes being made to the document at all (because the "test" operation results in an error):

[
  { "op": "replace", "path": "/a/b/c", "value": 42 },
  { "op": "test", "path": "/a/b/c", "value": "C" }
]