additionalProperties: false and anyOf/allOf

[rafalkrupinski]

When validating against additionalProperties: false, should properties declared under anyOf or allOf also be considered?

For example

Value:

key: value

Schema:

type: object
properties: []
additionalProperties: false
allOf:
- properties:
  - key
    type: string

Is the property "key" valid in this object?

[jviotti]

Hi @rafalkrupinski ,

In your example, it should not. additionalProperties only considers a properties keyword that is a direct sibling of it, ignoring any other one. However, in 2019-09 and later, we introduced unevaluatedProperties (https://www.learnjsonschema.com/2020-12/unevaluated/unevaluatedproperties/) for that specific reason: it can look at adjacent properties that are not direct siblings.

For example:

type: object
properties: []
unevaluatedProperties: false
allOf:
- properties:
  - key
    type: string

[rafalkrupinski]

Ooh, that's a great source you've linked. Thank you!

[jviotti]

Any time! learnjsonschema.com is very much in progress but any comment you have don't hesitate in opening an issue! https://github.com/sourcemeta/learnjsonschema.com

[rafalkrupinski]

No worries, I'm still working with the old Wrigth draft / openapi 3.0. The docs there should be enough.