Define default value for an enum

[srika4]

Hi. Looking for an example to define a "default value" with an enum.

{
  "properties": {
    "Param": {
      "const": "p1", // not working
      "default": "p1", // is this correct and can validate?
      "enum": [
        "p1",
        "p3"
      ]
    }
  }
}

[gregsdennis]

"const": "p1", // not working

Can you show instances where this isn't working?

"default": "p1", // is this correct and can validate?

default is just an annotation. It doesn't validate, and it doesn't provide a value to be validated if the instance doesn't have that property. It's just there as information for the consumer.

`"const": ..., "enum": ... "

Both of these keywords are intended to be used independently. const requires that the instance is exactly that value, and enum can be considered a oneOf with a bunch of consts in it.

{ "enum": [ 1, 2, 3 ] }

is the same as

{
  "oneOf": [
    { "const": 1 },
    { "const": 2 },
    { "const": 3 }
  ]
}