multiple types + enum gives false negative

[moeriki]

Hi all,

Code below gives a false negative on validation. Country can be null or any of the enum list. When validating null it returns an error.

var validate = validator({
    type: 'object',
    properties: {
        country: {
            type: [
                'string',
                'null',
            ],
            enum: [
                'BE',
                'NL',
            ],
        },
    },
});

validate({
    country: null,
});

[ { "field": "data.country", "message": "must be an enum value" } ]

[dmeznaric]

you just need to add null to enum values.

var validate = validator({
    type: 'object',
        properties: {
          country: {
            type: [
              'string',
              'null'
            ],
            enum: [
              'BE',
              'NL',
              null
            ]
          }
    },
});

validate({
    country: null,
});

[emilbayes]

Based on the JSON Schema definition of enum I believe @dmeznaric suggestion to be correct.

However you could relax the definition of your country rule by removing the type. enum is strictly defined by it's array. You can see how the rule behave here