How to constraint values of an object in JSON schema?

Question

I want to constrain my object values. In particular, only string and array (of string) types are allowed:

"myobject": {
  "string": "foo",
  "array": [
    "bar",
    "baz",
  ],
  "bool": true, // invalid
  "object": {}, // invalid
}

Object keys should be "free". I can't find a way to do this in JSON schema.

The following seems not working, it still allow bool and object value types:

"myobject": {
  "type": "object",
  "properties": {
    "type": ["string", "array"]
  }
}

@Inga thanks for helping, but in that question, the key are "fixed". It's easy to define types for a fixed-keys object. — gremo
– gremo, Commented Jun 7, 2020 at 7:45

Carsten · Accepted Answer · 2020-06-07 08:33:17Z

2

If the keys are „free“ as you put it, you can use the additionalProperties keyword like this:

{
  "type": "object",
  "additionalProperties": {
    "type": ["string", "array"]
  }
}

answered Jun 7, 2020 at 8:33

Carsten

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