Validating nested list of numbers/booleans with JSON schema

Question

I'm not sure if this is possible with JSON schema, but I have data similar to this:

[1, 1, [0, 0, [true]], true]

How can I validate [0, 0, 1] so that at least one of the items is 1/true?

So far, I have managed to create schema to this point:

 { "type": "array", "items": { "$ref": "#/definitions/_items" }, "definitions": { "_items": { "anyOf": [ { "enum": [ 0, 1 ], "type": "integer" }, { "enum": [ false, true ], "type": "boolean" }, { "type": "array", "items": { "anyOf": [ { "$ref": "#/definitions/_items" } ] } } ] } } } 

Apparently it does validate all accepted values, but it doesn't take on account, if there are all, some, one, or none of the values 1 / true. I misunderstood, that anyOf, allOf and oneOf are reserved for that...

Answer 1

What you need is a contains keyword. This is planned to be added in the next version of the JSON Schema specification. Until that is implemented, you can do it without contains , but the logic is a bit complicated. I've also cleaned up some of the unnecessary bits from what you have so far.

{
  "type": "array",
  "items": { "$ref": "#/definitions/_items" },
  "allOf": [{ "$ref": "#/definitions/contains-1-or-true" }],
  "definitions": {
    "_items": {
      "anyOf": [
        { "enum": [0, 1] },
        { "type": "boolean" },
        { "$ref": "#" }
      ]
    },
    "contains-1-or-true": {
      "not": {
        "type": "array",
        "items": {
          "not": { "enum": [1, true] }
        }
      }
    }
  }
}